{"id":39634,"date":"2026-03-23T20:58:31","date_gmt":"2026-03-23T18:58:31","guid":{"rendered":"https:\/\/diagnozabam.ro\/sfaturi\/?p=39634"},"modified":"2026-03-23T20:58:31","modified_gmt":"2026-03-23T18:58:31","slug":"p0303-code-cylinder-3-misfire-causes-symptoms-fix","status":"publish","type":"post","link":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\/","title":{"rendered":"P0303 Code \u2013 Cylinder 3 Misfire (Causes, Symptoms, Fix)"},"content":{"rendered":"<p data-start=\"524\" data-end=\"644\">The <strong data-start=\"528\" data-end=\"550\">P0303 trouble code<\/strong> indicates that the engine control unit (ECU) has detected a <strong data-start=\"611\" data-end=\"643\">misfire in cylinder number 3<\/strong>.<\/p>\n<p data-start=\"646\" data-end=\"825\">A misfire occurs when the air-fuel mixture inside the cylinder fails to burn correctly. This can happen due to ignition problems, fuel delivery issues or mechanical engine faults.<\/p>\n<p data-start=\"827\" data-end=\"965\">When this happens repeatedly, the ECU records the <strong data-start=\"877\" data-end=\"916\">P0303 diagnostic trouble code (<a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0205-code-injector-circuit-malfunction-cylinder-5\/\">DTC<\/a>)<\/strong> and usually turns on the <strong data-start=\"942\" data-end=\"964\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/%e2%9a%99%ef%b8%8f-faulty-maf-sensor-symptoms-causes-fixes\/\">Check Engine<\/a> Light<\/strong>.<\/p>\n<p data-start=\"967\" data-end=\"1048\">Misfires can cause rough engine operation, <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/%e2%9a%99%ef%b8%8f-faulty-maf-sensor-symptoms-causes-fixes\/\">loss of power<\/a> and increased <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/wet-vs-dry-timing-belt-what-drivers-must-know\/\">emissions<\/a>.<\/p>\n<hr data-start=\"1050\" data-end=\"1053\" \/>\n<h2 data-section-id=\"2ekyjz\" data-start=\"1055\" data-end=\"1097\">How Cylinder Misfires Affect the Engine<\/h2>\n<p data-start=\"1099\" data-end=\"1188\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/wet-vs-dry-timing-belt-what-drivers-must-know\/\">Modern engines<\/a> rely on precise combustion <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/%e2%9a%99%ef%b8%8f-timing-belt-or-chain-interval-the-real-maintenance-guide\/\">timing<\/a>. If one cylinder stops firing correctly:<\/p>\n<ul data-start=\"1190\" data-end=\"1302\">\n<li data-section-id=\"vhls1r\" data-start=\"1190\" data-end=\"1216\">\n<p data-start=\"1192\" data-end=\"1216\">the engine loses balance<\/p>\n<\/li>\n<li data-section-id=\"78ce6z\" data-start=\"1217\" data-end=\"1249\">\n<p data-start=\"1219\" data-end=\"1249\">fuel is not burned efficiently<\/p>\n<\/li>\n<li data-section-id=\"1969vpp\" data-start=\"1250\" data-end=\"1271\">\n<p data-start=\"1252\" data-end=\"1271\">vibration increases<\/p>\n<\/li>\n<li data-section-id=\"dodjon\" data-start=\"1272\" data-end=\"1302\">\n<p data-start=\"1274\" data-end=\"1302\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/wet-vs-dry-timing-belt-what-drivers-must-know\/\">emissions<\/a> rise significantly<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1304\" data-end=\"1432\">If ignored for too long, a misfire can also damage the <strong data-start=\"1359\" data-end=\"1382\">catalytic converter<\/strong> due to unburned fuel entering the <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/exhaust-smoke-colors\/\">exhaust<\/a> system.<\/p>\n<hr data-start=\"1434\" data-end=\"1437\" \/>\n<h2 data-section-id=\"1qemycj\" data-start=\"1439\" data-end=\"1464\">Common Causes of P0303<\/h2>\n<p data-start=\"1466\" data-end=\"1516\">Several components may trigger the <strong data-start=\"1501\" data-end=\"1515\">P0303 code<\/strong>.<\/p>\n<h3 data-section-id=\"12vwl66\" data-start=\"1518\" data-end=\"1546\">Ignition system problems<\/h3>\n<p data-start=\"1547\" data-end=\"1605\">The ignition system is the most common source of misfires.<\/p>\n<p data-start=\"1607\" data-end=\"1631\">Possible issues include:<\/p>\n<ul data-start=\"1633\" data-end=\"1742\">\n<li data-section-id=\"ihfi6w\" data-start=\"1633\" data-end=\"1666\">\n<p data-start=\"1635\" data-end=\"1666\">faulty spark plug in cylinder 3<\/p>\n<\/li>\n<li data-section-id=\"s461tc\" data-start=\"1667\" data-end=\"1687\">\n<p data-start=\"1669\" data-end=\"1687\">worn ignition coil<\/p>\n<\/li>\n<li data-section-id=\"ntb35n\" data-start=\"1688\" data-end=\"1713\">\n<p data-start=\"1690\" data-end=\"1713\">damaged spark plug wire<\/p>\n<\/li>\n<li data-section-id=\"1xvbmwi\" data-start=\"1714\" data-end=\"1742\">\n<p data-start=\"1716\" data-end=\"1742\">poor electrical connection<\/p>\n<\/li>\n<\/ul>\n<h3 data-section-id=\"zzdhuy\" data-start=\"1744\" data-end=\"1768\">Fuel delivery issues<\/h3>\n<p data-start=\"1769\" data-end=\"1854\">If the fuel injector does not supply the correct amount of fuel, combustion may fail.<\/p>\n<p data-start=\"1856\" data-end=\"1873\">Examples include:<\/p>\n<ul data-start=\"1875\" data-end=\"1943\">\n<li data-section-id=\"1pitbgx\" data-start=\"1875\" data-end=\"1898\">\n<p data-start=\"1877\" data-end=\"1898\">clogged fuel injector<\/p>\n<\/li>\n<li data-section-id=\"10vclw5\" data-start=\"1899\" data-end=\"1923\">\n<p data-start=\"1901\" data-end=\"1923\">faulty injector wiring<\/p>\n<\/li>\n<li data-section-id=\"1wmg0eb\" data-start=\"1924\" data-end=\"1943\">\n<p data-start=\"1926\" data-end=\"1943\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/low-fuel-consumption-cars-2026\/\">low fuel<\/a> pressure<\/p>\n<\/li>\n<\/ul>\n<h3 data-section-id=\"1n6rkvs\" data-start=\"1945\" data-end=\"1968\">Air intake problems<\/h3>\n<p data-start=\"1969\" data-end=\"2015\">Incorrect air mixture can also cause misfires.<\/p>\n<p data-start=\"2017\" data-end=\"2033\">Possible causes:<\/p>\n<ul data-start=\"2035\" data-end=\"2101\">\n<li data-section-id=\"ij1bj5\" data-start=\"2035\" data-end=\"2049\">\n<p data-start=\"2037\" data-end=\"2049\">vacuum leaks<\/p>\n<\/li>\n<li data-section-id=\"ldrj54\" data-start=\"2050\" data-end=\"2077\">\n<p data-start=\"2052\" data-end=\"2077\">dirty mass airflow sensor<\/p>\n<\/li>\n<li data-section-id=\"1a8yp0u\" data-start=\"2078\" data-end=\"2101\">\n<p data-start=\"2080\" data-end=\"2101\">intake manifold leaks<\/p>\n<\/li>\n<\/ul>\n<h3 data-section-id=\"bjwhln\" data-start=\"2103\" data-end=\"2133\">Mechanical engine problems<\/h3>\n<p data-start=\"2134\" data-end=\"2180\">More serious issues may also trigger the code.<\/p>\n<p data-start=\"2182\" data-end=\"2196\">These include:<\/p>\n<ul data-start=\"2198\" data-end=\"2287\">\n<li data-section-id=\"aa3pd0\" data-start=\"2198\" data-end=\"2229\">\n<p data-start=\"2200\" data-end=\"2229\">low compression in cylinder 3<\/p>\n<\/li>\n<li data-section-id=\"by3e0i\" data-start=\"2230\" data-end=\"2249\">\n<p data-start=\"2232\" data-end=\"2249\">worn piston rings<\/p>\n<\/li>\n<li data-section-id=\"1xydczw\" data-start=\"2250\" data-end=\"2264\">\n<p data-start=\"2252\" data-end=\"2264\">burnt valves<\/p>\n<\/li>\n<li data-section-id=\"191nwt3\" data-start=\"2265\" data-end=\"2287\">\n<p data-start=\"2267\" data-end=\"2287\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/head-gasket-repair-cost-what-youll-really-pay\/\">head gasket<\/a> problems<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"2289\" data-end=\"2292\" \/>\n<h2 data-section-id=\"i8v94q\" data-start=\"2294\" data-end=\"2323\">Symptoms of the P0303 Code<\/h2>\n<p data-start=\"2325\" data-end=\"2390\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/pc-freezes-randomly-causes-and-fix\/\">Drivers<\/a> may notice several symptoms when <strong data-start=\"2366\" data-end=\"2389\">cylinder 3 misfires<\/strong>.<\/p>\n<p data-start=\"2392\" data-end=\"2413\">Common signs include:<\/p>\n<ul data-start=\"2415\" data-end=\"2552\">\n<li data-section-id=\"m4qvhn\" data-start=\"2415\" data-end=\"2427\">\n<p data-start=\"2417\" data-end=\"2427\">rough idle<\/p>\n<\/li>\n<li data-section-id=\"152ay9g\" data-start=\"2428\" data-end=\"2446\">\n<p data-start=\"2430\" data-end=\"2446\">engine vibration<\/p>\n<\/li>\n<li data-section-id=\"zfd2m5\" data-start=\"2447\" data-end=\"2462\">\n<p data-start=\"2449\" data-end=\"2462\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/%e2%9a%99%ef%b8%8f-faulty-maf-sensor-symptoms-causes-fixes\/\">loss of power<\/a><\/p>\n<\/li>\n<li data-section-id=\"1wcuyz0\" data-start=\"2463\" data-end=\"2482\">\n<p data-start=\"2465\" data-end=\"2482\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0209-code-injector-circuit-cylinder-9-fault\/\">poor fuel economy<\/a><\/p>\n<\/li>\n<li data-section-id=\"dqeq3d\" data-start=\"2483\" data-end=\"2522\">\n<p data-start=\"2485\" data-end=\"2522\">engine <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0209-code-injector-circuit-cylinder-9-fault\/\">hesitation during acceleration<\/a><\/p>\n<\/li>\n<li data-section-id=\"190izym\" data-start=\"2523\" data-end=\"2552\">\n<p data-start=\"2525\" data-end=\"2552\">flashing <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/%e2%9a%99%ef%b8%8f-faulty-maf-sensor-symptoms-causes-fixes\/\">Check Engine<\/a> Light<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2554\" data-end=\"2658\">If the warning light <strong data-start=\"2575\" data-end=\"2586\">flashes<\/strong>, it indicates a severe misfire that may damage the catalytic converter.<\/p>\n<hr data-start=\"2660\" data-end=\"2663\" \/>\n<h2 data-section-id=\"1ebav42\" data-start=\"2665\" data-end=\"2689\">How to Diagnose P0303<\/h2>\n<p data-start=\"2691\" data-end=\"2739\">Proper diagnosis requires a systematic approach.<\/p>\n<h3 data-section-id=\"13znv0o\" data-start=\"2741\" data-end=\"2770\">Step 1 \u2013 Scan the vehicle<\/h3>\n<p data-start=\"2771\" data-end=\"2861\">Use an <strong data-start=\"2778\" data-end=\"2794\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0229-code-throttle-pedal-position-sensor-c-intermittent\/\">OBD2<\/a> scanner<\/strong> to confirm the stored code and check for additional <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/obd2-winter-codes-what-they-mean-and-why-they-appear\/\">codes<\/a> such as:<\/p>\n<ul data-start=\"2863\" data-end=\"2894\">\n<li data-section-id=\"1769dyz\" data-start=\"2863\" data-end=\"2870\">\n<p data-start=\"2865\" data-end=\"2870\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0300-random-misfire-causes-symptoms-fix\/\">P0300<\/a><\/p>\n<\/li>\n<li data-section-id=\"1769dyy\" data-start=\"2871\" data-end=\"2878\">\n<p data-start=\"2873\" data-end=\"2878\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0301-code-cylinder-1-misfire-detected\/\">P0301<\/a><\/p>\n<\/li>\n<li data-section-id=\"1769dyx\" data-start=\"2879\" data-end=\"2886\">\n<p data-start=\"2881\" data-end=\"2886\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0302-code-cylinder-2-misfire-detected\/\">P0302<\/a><\/p>\n<\/li>\n<li data-section-id=\"1769dz3\" data-start=\"2887\" data-end=\"2894\">\n<p data-start=\"2889\" data-end=\"2894\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0304-code-cylinder-4-misfire-detected\/\">P0304<\/a><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2896\" data-end=\"2942\">These may indicate multiple cylinder misfires.<\/p>\n<h3 data-section-id=\"i1dkh1\" data-start=\"2944\" data-end=\"2976\">Step 2 \u2013 Inspect spark plugs<\/h3>\n<p data-start=\"2977\" data-end=\"3029\">Remove the spark plug from cylinder 3 and check for:<\/p>\n<ul data-start=\"3031\" data-end=\"3086\">\n<li data-section-id=\"17g2jb6\" data-start=\"3031\" data-end=\"3050\">\n<p data-start=\"3033\" data-end=\"3050\">oil contamination<\/p>\n<\/li>\n<li data-section-id=\"1yggplk\" data-start=\"3051\" data-end=\"3068\">\n<p data-start=\"3053\" data-end=\"3068\">carbon deposits<\/p>\n<\/li>\n<li data-section-id=\"11nsqyg\" data-start=\"3069\" data-end=\"3086\">\n<p data-start=\"3071\" data-end=\"3086\">worn electrodes<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"3088\" data-end=\"3133\">Replacing spark plugs often solves the issue.<\/p>\n<h3 data-section-id=\"mk8kgt\" data-start=\"3135\" data-end=\"3168\">Step 3 \u2013 Check ignition coils<\/h3>\n<p data-start=\"3169\" data-end=\"3297\">Swap the ignition coil from cylinder 3 with another cylinder.<br data-start=\"3230\" data-end=\"3233\" \/>If the misfire moves to another cylinder, the coil is defective.<\/p>\n<h3 data-section-id=\"1b67fk4\" data-start=\"3299\" data-end=\"3334\">Step 4 \u2013 Test the fuel injector<\/h3>\n<p data-start=\"3335\" data-end=\"3407\">Listen for injector <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/hdd-clicking-noise-causes-and-data-recovery-guide\/\">clicking<\/a> sounds or perform an injector balance test.<\/p>\n<h3 data-section-id=\"p0owq\" data-start=\"3409\" data-end=\"3448\">Step 5 \u2013 Perform a compression test<\/h3>\n<p data-start=\"3449\" data-end=\"3560\">If ignition and fuel systems are working correctly, a <strong data-start=\"3503\" data-end=\"3523\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/how-to-check-a-blown-head-gasket\/\">compression test<\/a><\/strong> may reveal internal engine problems.<\/p>\n<hr data-start=\"3562\" data-end=\"3565\" \/>\n<h2 data-section-id=\"1b1qjll\" data-start=\"3567\" data-end=\"3596\">Repair Solutions for P0303<\/h2>\n<p data-start=\"3598\" data-end=\"3643\">Fixing the problem depends on the root cause.<\/p>\n<p data-start=\"3645\" data-end=\"3668\">Common repairs include:<\/p>\n<ul data-start=\"3670\" data-end=\"3850\">\n<li data-section-id=\"167pnl3\" data-start=\"3670\" data-end=\"3693\">\n<p data-start=\"3672\" data-end=\"3693\">replacing spark plugs<\/p>\n<\/li>\n<li data-section-id=\"saihgu\" data-start=\"3694\" data-end=\"3720\">\n<p data-start=\"3696\" data-end=\"3720\">replacing ignition coils<\/p>\n<\/li>\n<li data-section-id=\"6ss2fm\" data-start=\"3721\" data-end=\"3759\">\n<p data-start=\"3723\" data-end=\"3759\">cleaning or replacing fuel <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/do-gasoline-engines-have-injectors-full-technical-breakdown\/\">injectors<\/a><\/p>\n<\/li>\n<li data-section-id=\"4dz0ik\" data-start=\"3760\" data-end=\"3784\">\n<p data-start=\"3762\" data-end=\"3784\">repairing vacuum leaks<\/p>\n<\/li>\n<li data-section-id=\"udynky\" data-start=\"3785\" data-end=\"3811\">\n<p data-start=\"3787\" data-end=\"3811\">replacing damaged wiring<\/p>\n<\/li>\n<li data-section-id=\"1m55m0w\" data-start=\"3812\" data-end=\"3850\">\n<p data-start=\"3814\" data-end=\"3850\">repairing internal engine components<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"3852\" data-end=\"3930\">Many P0303 cases are resolved with <strong data-start=\"3887\" data-end=\"3929\">simple ignition component replacements<\/strong>.<\/p>\n<hr data-start=\"3932\" data-end=\"3935\" \/>\n<h2 data-section-id=\"1y9b7ep\" data-start=\"3937\" data-end=\"3961\">Estimated Repair Cost<\/h2>\n<p data-start=\"3963\" data-end=\"4017\">Costs depend on the faulty component and vehicle type.<\/p>\n<p data-start=\"4019\" data-end=\"4041\">Typical repair ranges:<\/p>\n<div class=\"TyagGW_tableContainer\">\n<div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"4043\" data-end=\"4285\">\n<thead data-start=\"4043\" data-end=\"4070\">\n<tr data-start=\"4043\" data-end=\"4070\">\n<th class=\"\" data-start=\"4043\" data-end=\"4052\" data-col-size=\"sm\">Repair<\/th>\n<th class=\"\" data-start=\"4052\" data-end=\"4070\" data-col-size=\"sm\">Estimated Cost<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"4087\" data-end=\"4285\">\n<tr data-start=\"4087\" data-end=\"4124\">\n<td data-start=\"4087\" data-end=\"4110\" data-col-size=\"sm\">Spark plug replacement<\/td>\n<td data-start=\"4110\" data-end=\"4124\" data-col-size=\"sm\">$50 \u2013 $150<\/td>\n<\/tr>\n<tr data-start=\"4125\" data-end=\"4166\">\n<td data-start=\"4125\" data-end=\"4151\" data-col-size=\"sm\">Ignition coil replacement<\/td>\n<td data-start=\"4151\" data-end=\"4166\" data-col-size=\"sm\">$120 \u2013 $350<\/td>\n<\/tr>\n<tr data-start=\"4167\" data-end=\"4208\">\n<td data-start=\"4167\" data-end=\"4193\" data-col-size=\"sm\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0209-code-injector-circuit-cylinder-9-fault\/\">Fuel injector replacement<\/a><\/td>\n<td data-start=\"4193\" data-end=\"4208\" data-col-size=\"sm\">$200 \u2013 $600<\/td>\n<\/tr>\n<tr data-start=\"4209\" data-end=\"4243\">\n<td data-start=\"4209\" data-end=\"4228\" data-col-size=\"sm\">Vacuum leak repair<\/td>\n<td data-start=\"4228\" data-end=\"4243\" data-col-size=\"sm\">$100 \u2013 $300<\/td>\n<\/tr>\n<tr data-start=\"4244\" data-end=\"4285\">\n<td data-start=\"4244\" data-end=\"4269\" data-col-size=\"sm\">Engine mechanical repair<\/td>\n<td data-start=\"4269\" data-end=\"4285\" data-col-size=\"sm\">$800 \u2013 $3000<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p data-start=\"4287\" data-end=\"4339\">Early diagnosis can prevent expensive engine damage.<\/p>\n<hr data-start=\"4341\" data-end=\"4344\" \/>\n<h2 data-section-id=\"1gvf67t\" data-start=\"4346\" data-end=\"4378\">Can You Drive With Code P0303<\/h2>\n<p data-start=\"4380\" data-end=\"4432\">Driving with a <strong data-start=\"4395\" data-end=\"4412\">P0303 misfire<\/strong> is not recommended.<\/p>\n<p data-start=\"4434\" data-end=\"4501\">Short trips may still be possible, but continued driving can cause:<\/p>\n<ul data-start=\"4503\" data-end=\"4586\">\n<li data-section-id=\"1q7qegv\" data-start=\"4503\" data-end=\"4531\">\n<p data-start=\"4505\" data-end=\"4531\">catalytic converter damage<\/p>\n<\/li>\n<li data-section-id=\"rrsdt2\" data-start=\"4532\" data-end=\"4557\">\n<p data-start=\"4534\" data-end=\"4557\">severe engine vibration<\/p>\n<\/li>\n<li data-section-id=\"fqnftj\" data-start=\"4558\" data-end=\"4586\">\n<p data-start=\"4560\" data-end=\"4586\">increased fuel consumption<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"4588\" data-end=\"4671\">If the <strong data-start=\"4595\" data-end=\"4625\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/%e2%9a%99%ef%b8%8f-faulty-maf-sensor-symptoms-causes-fixes\/\">Check Engine<\/a> Light flashes<\/strong>, the vehicle should be inspected immediately.<\/p>\n<hr data-start=\"4673\" data-end=\"4676\" \/>\n<h2 data-section-id=\"1fq9usd\" data-start=\"4678\" data-end=\"4697\">FAQ \u2013 P0303 Code<\/h2>\n<h3 data-section-id=\"p9fs4\" data-start=\"4699\" data-end=\"4725\">What cylinder is P0303<\/h3>\n<p data-start=\"4726\" data-end=\"4777\">P0303 indicates a misfire in <strong data-start=\"4755\" data-end=\"4776\">cylinder number 3<\/strong>.<\/p>\n<h3 data-section-id=\"1ycb688\" data-start=\"4779\" data-end=\"4815\">Can a bad spark plug cause P0303<\/h3>\n<p data-start=\"4816\" data-end=\"4900\">Yes. A worn or damaged spark plug is one of the <strong data-start=\"4864\" data-end=\"4886\">most common causes<\/strong> of this code.<\/p>\n<h3 data-section-id=\"1adlbd4\" data-start=\"4902\" data-end=\"4922\">Is P0303 serious<\/h3>\n<p data-start=\"4923\" data-end=\"5019\">Yes. If ignored, a misfire can damage the <strong data-start=\"4965\" data-end=\"4988\">catalytic converter<\/strong> and reduce engine performance.<\/p>\n<h3 data-section-id=\"a42uam\" data-start=\"5021\" data-end=\"5048\">How do I fix code P0303<\/h3>\n<p data-start=\"5049\" data-end=\"5187\">Start by checking the <strong data-start=\"5071\" data-end=\"5103\">spark plug and ignition coil<\/strong> in cylinder 3. If the issue remains, inspect fuel <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/do-gasoline-engines-have-injectors-full-technical-breakdown\/\">injectors<\/a> and engine compression.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The P0303 trouble code indicates that the engine control unit (ECU) has detected a misfire in cylinder number 3. A misfire occurs when the air-fuel mixture inside the cylinder fails to burn correctly. This can happen due to ignition problems, fuel delivery issues or mechanical engine faults. When this happens repeatedly, the ECU records the [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":10039,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[45415],"tags":[45763,42841,45757,43981,45765,37241,45407,45759,45761,44497,45767,45517],"class_list":["post-39634","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-obd2-en","tag-car-repair-guide","tag-check-engine-light","tag-cylinder-3-misfire","tag-engine-diagnostics","tag-engine-fault-codes","tag-engine-misfire","tag-misfire-causes","tag-misfire-cylinder-3","tag-obd2-code-p0303","tag-obd2-diagnostics","tag-p0303","tag-p0303-code"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.2 (Yoast SEO v27.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>P0303 Code \u2013 Cylinder 3 Misfire (Causes, Symptoms, Fix) - Diagnoza BAM<\/title>\n<meta name=\"description\" content=\"P0303 code means cylinder 3 misfire detected. Learn the causes, symptoms, diagnostic steps and repair costs before serious...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\/\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0303 Code \u2013 Cylinder 3 Misfire (Causes, Symptoms, Fix)\" \/>\n<meta property=\"og:description\" content=\"P0303 code means cylinder 3 misfire detected. Learn the causes, symptoms, diagnostic steps and repair costs before serious engine damage\" \/>\n<meta property=\"og:url\" content=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\/\" \/>\n<meta property=\"og:site_name\" content=\"Diagnoza BAM\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/diagnozabam\" \/>\n<meta property=\"article:published_time\" content=\"2026-03-23T18:58:31+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2024\/02\/lista-completa-coduri-de-eroare-opel-astra-h-zafira-b-td-cdti-mfrh-original.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"512\" \/>\n\t<meta property=\"og:image:height\" content=\"512\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Bejenaru Alexandru Ionut\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Scris de\" \/>\n\t<meta name=\"twitter:data1\" content=\"Bejenaru Alexandru Ionut\" \/>\n\t<meta name=\"twitter:label2\" content=\"Timp estimat pentru citire\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"NewsArticle\",\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\\\/\"},\"author\":{\"name\":\"Bejenaru Alexandru Ionut\",\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/#\\\/schema\\\/person\\\/77202adf825f4528d9ba9ab5b4ffafec\"},\"headline\":\"P0303 Code \u2013 Cylinder 3 Misfire (Causes, Symptoms, Fix)\",\"datePublished\":\"2026-03-23T18:58:31+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\\\/\"},\"wordCount\":648,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/wp-content\\\/uploads\\\/2024\\\/02\\\/lista-completa-coduri-de-eroare-opel-astra-h-zafira-b-td-cdti-mfrh-original.webp\",\"keywords\":[\"car repair guide\",\"check engine light\",\"cylinder 3 misfire\",\"engine diagnostics\",\"engine fault codes\",\"engine misfire\",\"misfire causes\",\"misfire cylinder 3\",\"obd2 code p0303\",\"OBD2 diagnostics\",\"P0303\",\"p0303 code\"],\"articleSection\":[\"OBD2-EN\"],\"inLanguage\":\"ro-RO\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\\\/#respond\"]}],\"copyrightYear\":\"2026\",\"copyrightHolder\":{\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\\\/\",\"url\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\\\/\",\"name\":\"P0303 Code \u2013 Cylinder 3 Misfire (Causes, Symptoms, Fix) - Diagnoza BAM\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/wp-content\\\/uploads\\\/2024\\\/02\\\/lista-completa-coduri-de-eroare-opel-astra-h-zafira-b-td-cdti-mfrh-original.webp\",\"datePublished\":\"2026-03-23T18:58:31+00:00\",\"description\":\"P0303 code means cylinder 3 misfire detected. Learn the causes, symptoms, diagnostic steps and repair costs before serious engine damage\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\\\/#breadcrumb\"},\"inLanguage\":\"ro-RO\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"ro-RO\",\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\\\/#primaryimage\",\"url\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/wp-content\\\/uploads\\\/2024\\\/02\\\/lista-completa-coduri-de-eroare-opel-astra-h-zafira-b-td-cdti-mfrh-original.webp\",\"contentUrl\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/wp-content\\\/uploads\\\/2024\\\/02\\\/lista-completa-coduri-de-eroare-opel-astra-h-zafira-b-td-cdti-mfrh-original.webp\",\"width\":512,\"height\":512,\"caption\":\"lista completa coduri de eroare opel astra h zafira b td cdti mfrh original\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"P0303 Code \u2013 Cylinder 3 Misfire (Causes, Symptoms, Fix)\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/#website\",\"url\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/\",\"name\":\"Diagnoza BAM\",\"description\":\"Independent Auto Diagnostics, Tech Analysis and Smart Insights\",\"publisher\":{\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/#organization\"},\"alternateName\":\"DBAM\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"ro-RO\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/#organization\",\"name\":\"Diagnoza BAM\",\"alternateName\":\"DBAM\",\"url\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"ro-RO\",\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/wp-content\\\/uploads\\\/2025\\\/11\\\/logo-diagnoza-bam-imagine.webp\",\"contentUrl\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/wp-content\\\/uploads\\\/2025\\\/11\\\/logo-diagnoza-bam-imagine.webp\",\"width\":512,\"height\":512,\"caption\":\"Diagnoza BAM\"},\"image\":{\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/diagnozabam\",\"https:\\\/\\\/mastodon.social\\\/@diagnozabam\",\"https:\\\/\\\/bsky.app\\\/profile\\\/did:plc:f4cmgfa3nv33bch7p3wgwchr\",\"https:\\\/\\\/www.tumblr.com\\\/diagbam\"],\"description\":\"Independent publishing platform focused on automotive diagnostics, OBD2 analysis, repair cost breakdowns, technology insights and practical technical guides.\",\"email\":\"redactie@diagnozabam.ro\",\"foundingDate\":\"2023-02-16\"},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/#\\\/schema\\\/person\\\/77202adf825f4528d9ba9ab5b4ffafec\",\"name\":\"Bejenaru Alexandru Ionut\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"ro-RO\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/96634b44a266a571c59a5e82fc6f12edfb6876914735dbc57aa2348d11395470?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/96634b44a266a571c59a5e82fc6f12edfb6876914735dbc57aa2348d11395470?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/96634b44a266a571c59a5e82fc6f12edfb6876914735dbc57aa2348d11395470?s=96&d=mm&r=g\",\"caption\":\"Bejenaru Alexandru Ionut\"},\"sameAs\":[\"https:\\\/\\\/diagnozabam.ro\"],\"honorificPrefix\":\"Mr.\",\"birthDate\":\"1997-12-23\",\"url\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/author\\\/bejenaru-alexandru-ionut\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"P0303 Code \u2013 Cylinder 3 Misfire (Causes, Symptoms, Fix) - Diagnoza BAM","description":"P0303 code means cylinder 3 misfire detected. Learn the causes, symptoms, diagnostic steps and repair costs before serious...","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\/","og_locale":"ro_RO","og_type":"article","og_title":"P0303 Code \u2013 Cylinder 3 Misfire (Causes, Symptoms, Fix)","og_description":"P0303 code means cylinder 3 misfire detected. Learn the causes, symptoms, diagnostic steps and repair costs before serious engine damage","og_url":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\/","og_site_name":"Diagnoza BAM","article_publisher":"https:\/\/www.facebook.com\/diagnozabam","article_published_time":"2026-03-23T18:58:31+00:00","og_image":[{"width":512,"height":512,"url":"https:\/\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2024\/02\/lista-completa-coduri-de-eroare-opel-astra-h-zafira-b-td-cdti-mfrh-original.webp","type":"image\/webp"}],"author":"Bejenaru Alexandru Ionut","twitter_card":"summary_large_image","twitter_misc":{"Scris de":"Bejenaru Alexandru Ionut","Timp estimat pentru citire":"4 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"NewsArticle","@id":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\/#article","isPartOf":{"@id":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\/"},"author":{"name":"Bejenaru Alexandru Ionut","@id":"https:\/\/diagnozabam.ro\/sfaturi\/#\/schema\/person\/77202adf825f4528d9ba9ab5b4ffafec"},"headline":"P0303 Code \u2013 Cylinder 3 Misfire (Causes, Symptoms, Fix)","datePublished":"2026-03-23T18:58:31+00:00","mainEntityOfPage":{"@id":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\/"},"wordCount":648,"commentCount":0,"publisher":{"@id":"https:\/\/diagnozabam.ro\/sfaturi\/#organization"},"image":{"@id":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\/#primaryimage"},"thumbnailUrl":"https:\/\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2024\/02\/lista-completa-coduri-de-eroare-opel-astra-h-zafira-b-td-cdti-mfrh-original.webp","keywords":["car repair guide","check engine light","cylinder 3 misfire","engine diagnostics","engine fault codes","engine misfire","misfire causes","misfire cylinder 3","obd2 code p0303","OBD2 diagnostics","P0303","p0303 code"],"articleSection":["OBD2-EN"],"inLanguage":"ro-RO","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\/#respond"]}],"copyrightYear":"2026","copyrightHolder":{"@id":"https:\/\/diagnozabam.ro\/sfaturi\/#organization"}},{"@type":"WebPage","@id":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\/","url":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\/","name":"P0303 Code \u2013 Cylinder 3 Misfire (Causes, Symptoms, Fix) - Diagnoza BAM","isPartOf":{"@id":"https:\/\/diagnozabam.ro\/sfaturi\/#website"},"primaryImageOfPage":{"@id":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\/#primaryimage"},"image":{"@id":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\/#primaryimage"},"thumbnailUrl":"https:\/\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2024\/02\/lista-completa-coduri-de-eroare-opel-astra-h-zafira-b-td-cdti-mfrh-original.webp","datePublished":"2026-03-23T18:58:31+00:00","description":"P0303 code means cylinder 3 misfire detected. Learn the causes, symptoms, diagnostic steps and repair costs before serious engine damage","breadcrumb":{"@id":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\/#breadcrumb"},"inLanguage":"ro-RO","potentialAction":[{"@type":"ReadAction","target":["https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\/"]}]},{"@type":"ImageObject","inLanguage":"ro-RO","@id":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\/#primaryimage","url":"https:\/\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2024\/02\/lista-completa-coduri-de-eroare-opel-astra-h-zafira-b-td-cdti-mfrh-original.webp","contentUrl":"https:\/\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2024\/02\/lista-completa-coduri-de-eroare-opel-astra-h-zafira-b-td-cdti-mfrh-original.webp","width":512,"height":512,"caption":"lista completa coduri de eroare opel astra h zafira b td cdti mfrh original"},{"@type":"BreadcrumbList","@id":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0303-code-cylinder-3-misfire-causes-symptoms-fix\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/diagnozabam.ro\/sfaturi\/"},{"@type":"ListItem","position":2,"name":"P0303 Code \u2013 Cylinder 3 Misfire (Causes, Symptoms, Fix)"}]},{"@type":"WebSite","@id":"https:\/\/diagnozabam.ro\/sfaturi\/#website","url":"https:\/\/diagnozabam.ro\/sfaturi\/","name":"Diagnoza BAM","description":"Independent Auto Diagnostics, Tech Analysis and Smart Insights","publisher":{"@id":"https:\/\/diagnozabam.ro\/sfaturi\/#organization"},"alternateName":"DBAM","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/diagnozabam.ro\/sfaturi\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"ro-RO"},{"@type":"Organization","@id":"https:\/\/diagnozabam.ro\/sfaturi\/#organization","name":"Diagnoza BAM","alternateName":"DBAM","url":"https:\/\/diagnozabam.ro\/sfaturi\/","logo":{"@type":"ImageObject","inLanguage":"ro-RO","@id":"https:\/\/diagnozabam.ro\/sfaturi\/#\/schema\/logo\/image\/","url":"https:\/\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2025\/11\/logo-diagnoza-bam-imagine.webp","contentUrl":"https:\/\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2025\/11\/logo-diagnoza-bam-imagine.webp","width":512,"height":512,"caption":"Diagnoza BAM"},"image":{"@id":"https:\/\/diagnozabam.ro\/sfaturi\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/diagnozabam","https:\/\/mastodon.social\/@diagnozabam","https:\/\/bsky.app\/profile\/did:plc:f4cmgfa3nv33bch7p3wgwchr","https:\/\/www.tumblr.com\/diagbam"],"description":"Independent publishing platform focused on automotive diagnostics, OBD2 analysis, repair cost breakdowns, technology insights and practical technical guides.","email":"redactie@diagnozabam.ro","foundingDate":"2023-02-16"},{"@type":"Person","@id":"https:\/\/diagnozabam.ro\/sfaturi\/#\/schema\/person\/77202adf825f4528d9ba9ab5b4ffafec","name":"Bejenaru Alexandru Ionut","image":{"@type":"ImageObject","inLanguage":"ro-RO","@id":"https:\/\/secure.gravatar.com\/avatar\/96634b44a266a571c59a5e82fc6f12edfb6876914735dbc57aa2348d11395470?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/96634b44a266a571c59a5e82fc6f12edfb6876914735dbc57aa2348d11395470?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/96634b44a266a571c59a5e82fc6f12edfb6876914735dbc57aa2348d11395470?s=96&d=mm&r=g","caption":"Bejenaru Alexandru Ionut"},"sameAs":["https:\/\/diagnozabam.ro"],"honorificPrefix":"Mr.","birthDate":"1997-12-23","url":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/author\/bejenaru-alexandru-ionut\/"}]}},"lang":"en","translations":{"en":39634},"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2024\/02\/lista-completa-coduri-de-eroare-opel-astra-h-zafira-b-td-cdti-mfrh-original.webp","jetpack-related-posts":[{"id":39442,"url":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0301-code-cylinder-1-misfire-detected\/","url_meta":{"origin":39634,"position":0},"title":"P0301 Code \u2013 Cylinder 1 Misfire Detected","author":"Bejenaru Alexandru Ionut","date":"22 martie 2026","format":false,"excerpt":"What Does the P0301 Code Mean The P0301 code indicates that the engine control unit (ECU) has detected a misfire in cylinder 1. A misfire occurs when the air-fuel mixture inside the cylinder fails to ignite properly during the combustion process. Modern engines monitor crankshaft speed and combustion efficiency to\u2026","rel":"","context":"\u00cen \u201eOBD2-EN\u201d","block_context":{"text":"OBD2-EN","link":"https:\/\/diagnozabam.ro\/sfaturi\/category\/obd2-en\/"},"img":{"alt_text":"lista completa coduri de eroare opel astra h zafira b td cdti mfrh original","src":"https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2024\/02\/lista-completa-coduri-de-eroare-opel-astra-h-zafira-b-td-cdti-mfrh-original.webp?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":39444,"url":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0302-code-cylinder-2-misfire-detected\/","url_meta":{"origin":39634,"position":1},"title":"P0302 Code \u2013 Cylinder 2 Misfire Detected","author":"Bejenaru Alexandru Ionut","date":"22 martie 2026","format":false,"excerpt":"What Does the P0302 Code Mean The P0302 code indicates that the engine control unit (ECU) has detected a misfire in cylinder 2. A misfire occurs when the air-fuel mixture inside the cylinder fails to ignite properly during the combustion cycle. Modern engines monitor combustion efficiency using crankshaft speed sensors\u2026","rel":"","context":"\u00cen \u201eOBD2-EN\u201d","block_context":{"text":"OBD2-EN","link":"https:\/\/diagnozabam.ro\/sfaturi\/category\/obd2-en\/"},"img":{"alt_text":"lista completa coduri de eroare opel astra h zafira b td cdti mfrh original","src":"https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2024\/02\/lista-completa-coduri-de-eroare-opel-astra-h-zafira-b-td-cdti-mfrh-original.webp?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":39448,"url":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0304-code-cylinder-4-misfire-detected\/","url_meta":{"origin":39634,"position":2},"title":"P0304 Code \u2013 Cylinder 4 Misfire Detected","author":"Bejenaru Alexandru Ionut","date":"22 martie 2026","format":false,"excerpt":"What Does the P0304 Code Mean The P0304 code indicates that the engine control unit (ECU) has detected a misfire in cylinder 4. A misfire occurs when the air-fuel mixture inside the cylinder fails to ignite correctly during the combustion process. Modern vehicles use sensors to monitor crankshaft speed and\u2026","rel":"","context":"\u00cen \u201eOBD2-EN\u201d","block_context":{"text":"OBD2-EN","link":"https:\/\/diagnozabam.ro\/sfaturi\/category\/obd2-en\/"},"img":{"alt_text":"lista completa coduri de eroare opel astra h zafira b td cdti mfrh original","src":"https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2024\/02\/lista-completa-coduri-de-eroare-opel-astra-h-zafira-b-td-cdti-mfrh-original.webp?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":39386,"url":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0300-random-misfire-causes-symptoms-fix\/","url_meta":{"origin":39634,"position":3},"title":"P0300 Random Misfire: Causes, Symptoms, Fix","author":"Bejenaru Alexandru Ionut","date":"4 martie 2026","format":false,"excerpt":"The P0300 random misfire code is one of the most common engine trouble codes found in modern vehicles. When this code appears, it means the engine control unit (ECU) has detected multiple cylinder misfires occurring randomly rather than in a single cylinder. Unlike codes such as P0301 or P0302, which\u2026","rel":"","context":"\u00cen \u201eOBD2-EN\u201d","block_context":{"text":"OBD2-EN","link":"https:\/\/diagnozabam.ro\/sfaturi\/category\/obd2-en\/"},"img":{"alt_text":"P0300 random misfire engine diagnosti","src":"https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2026\/03\/p0300-random-misfire-engine-diagnosti.webp?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2026\/03\/p0300-random-misfire-engine-diagnosti.webp?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2026\/03\/p0300-random-misfire-engine-diagnosti.webp?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2026\/03\/p0300-random-misfire-engine-diagnosti.webp?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2026\/03\/p0300-random-misfire-engine-diagnosti.webp?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":40350,"url":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0207-code-injector-circuit-malfunction-cylinder-7\/","url_meta":{"origin":39634,"position":4},"title":"P0207 Code \u2013 Injector Circuit Malfunction Cylinder 7","author":"Bejenaru Alexandru Ionut","date":"1 aprilie 2026","format":false,"excerpt":"The P0207 code indicates a malfunction in the fuel injector circuit for cylinder 7. The Engine Control Unit (ECU) monitors each injector individually, and when it detects abnormal voltage, resistance, or signal behavior, it triggers this fault. Fuel injectors are electronically controlled valves that deliver precise amounts of fuel into\u2026","rel":"","context":"\u00cen \u201eOBD2-EN\u201d","block_context":{"text":"OBD2-EN","link":"https:\/\/diagnozabam.ro\/sfaturi\/category\/obd2-en\/"},"img":{"alt_text":"lista completa coduri de eroare opel astra h zafira b td cdti mfrh original","src":"https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2024\/02\/lista-completa-coduri-de-eroare-opel-astra-h-zafira-b-td-cdti-mfrh-original.webp?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":38999,"url":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/engine-misfire-symptoms-warning-signs\/","url_meta":{"origin":39634,"position":5},"title":"Engine Misfire Symptoms \u2013 Warning Signs","author":"Bejenaru Alexandru Ionut","date":"12 martie 2026","format":false,"excerpt":"Engine misfire symptoms are among the most serious warnings your vehicle can display. Many drivers mistake them for minor vibration or \u201crough running,\u201d but a misfire is a combustion failure inside one or more cylinders. When the air-fuel mixture fails to ignite correctly, the engine becomes unbalanced. Power drops. Fuel\u2026","rel":"","context":"\u00cen \u201eNews\u201d","block_context":{"text":"News","link":"https:\/\/diagnozabam.ro\/sfaturi\/category\/news\/"},"img":{"alt_text":"httpscoastlineacademy.com","src":"https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2025\/12\/led-bord-colorat-vs-standard-ce-este-legal-si-ce-este-sigur.webp?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2025\/12\/led-bord-colorat-vs-standard-ce-este-legal-si-ce-este-sigur.webp?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2025\/12\/led-bord-colorat-vs-standard-ce-este-legal-si-ce-este-sigur.webp?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2025\/12\/led-bord-colorat-vs-standard-ce-este-legal-si-ce-este-sigur.webp?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2025\/12\/led-bord-colorat-vs-standard-ce-este-legal-si-ce-este-sigur.webp?resize=1050%2C600&ssl=1 3x"},"classes":[]}],"jetpack_likes_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/pf97go-ajg","jetpack_sharing_enabled":true,"pll_sync_post":[],"_links":{"self":[{"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/posts\/39634","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/comments?post=39634"}],"version-history":[{"count":1,"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/posts\/39634\/revisions"}],"predecessor-version":[{"id":39635,"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/posts\/39634\/revisions\/39635"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/media\/10039"}],"wp:attachment":[{"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/media?parent=39634"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/categories?post=39634"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/tags?post=39634"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}