{"id":40278,"date":"2026-03-30T22:58:06","date_gmt":"2026-03-30T20:58:06","guid":{"rendered":"https:\/\/diagnozabam.ro\/sfaturi\/?p=40278"},"modified":"2026-03-30T22:58:06","modified_gmt":"2026-03-30T20:58:06","slug":"p0140-code-o2-sensor-circuit-no-activity-detected","status":"publish","type":"post","link":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0140-code-o2-sensor-circuit-no-activity-detected\/","title":{"rendered":"P0140 Code \u2013 O2 Sensor Circuit No Activity Detected"},"content":{"rendered":"<p data-start=\"224\" data-end=\"346\">The <strong data-start=\"228\" data-end=\"242\">P0140 code<\/strong> indicates that the <strong data-start=\"262\" data-end=\"318\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0134-code-o2-sensor-circuit-no-activity-detected\/\">oxygen sensor<\/a> (O2 sensor) located on Bank 1 Sensor 2<\/strong> is showing <strong data-start=\"330\" data-end=\"345\">no activity<\/strong>.<\/p>\n<p data-start=\"348\" data-end=\"549\">This sensor is positioned <strong data-start=\"374\" data-end=\"427\">after the catalytic converter (downstream sensor)<\/strong> and its main role is to <strong data-start=\"452\" data-end=\"494\">monitor catalytic converter efficiency<\/strong>, not to control fuel mixture like the upstream sensor.<\/p>\n<p data-start=\"551\" data-end=\"621\">When the <strong data-start=\"560\" data-end=\"589\">Engine Control Unit (ECU)<\/strong> detects that the sensor signal:<\/p>\n<ul data-start=\"622\" data-end=\"691\">\n<li data-section-id=\"1efduod\" data-start=\"622\" data-end=\"633\">\n<p data-start=\"624\" data-end=\"633\">is flat<\/p>\n<\/li>\n<li data-section-id=\"15akuwd\" data-start=\"634\" data-end=\"656\">\n<p data-start=\"636\" data-end=\"656\">does not fluctuate<\/p>\n<\/li>\n<li data-section-id=\"1vmsdek\" data-start=\"657\" data-end=\"691\">\n<p data-start=\"659\" data-end=\"691\">or shows no response over time<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"693\" data-end=\"737\">it triggers the <strong data-start=\"709\" data-end=\"736\">P0140 <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0229-code-throttle-pedal-position-sensor-c-intermittent\/\">OBD2<\/a> trouble code<\/strong>.<\/p>\n<hr data-start=\"739\" data-end=\"742\" \/>\n<h2 data-section-id=\"1m2c4vv\" data-start=\"744\" data-end=\"781\">How the Downstream O2 Sensor Works<\/h2>\n<p data-start=\"783\" data-end=\"837\">Unlike upstream sensors, the downstream sensor should:<\/p>\n<ul data-start=\"838\" data-end=\"935\">\n<li data-section-id=\"tlqeyn\" data-start=\"838\" data-end=\"872\">\n<p data-start=\"840\" data-end=\"872\">show <strong data-start=\"845\" data-end=\"872\">stable voltage patterns<\/strong><\/p>\n<\/li>\n<li data-section-id=\"76c2dz\" data-start=\"873\" data-end=\"898\">\n<p data-start=\"875\" data-end=\"898\">react slower to changes<\/p>\n<\/li>\n<li data-section-id=\"1funapv\" data-start=\"899\" data-end=\"935\">\n<p data-start=\"901\" data-end=\"935\">monitor <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/wet-vs-dry-timing-belt-what-drivers-must-know\/\">emissions<\/a> after combustion<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"937\" data-end=\"999\">If the signal is completely inactive \u2192 ECU assumes failure.<\/p>\n<hr data-start=\"1001\" data-end=\"1004\" \/>\n<h2 data-section-id=\"1su7xuz\" data-start=\"1006\" data-end=\"1026\">Symptoms of P0140<\/h2>\n<p data-start=\"1028\" data-end=\"1076\">In many cases, symptoms are mild or even absent:<\/p>\n<ul data-start=\"1078\" data-end=\"1215\">\n<li data-section-id=\"13qodzz\" data-start=\"1078\" data-end=\"1103\">\n<p data-start=\"1080\" data-end=\"1103\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/%e2%9a%99%ef%b8%8f-faulty-maf-sensor-symptoms-causes-fixes\/\">Check Engine<\/a> Light ON<\/p>\n<\/li>\n<li data-section-id=\"wrwq7\" data-start=\"1104\" data-end=\"1143\">\n<p data-start=\"1106\" data-end=\"1143\">slightly increased fuel consumption<\/p>\n<\/li>\n<li data-section-id=\"17pfn53\" data-start=\"1144\" data-end=\"1169\">\n<p data-start=\"1146\" data-end=\"1169\">failed <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/wet-vs-dry-timing-belt-what-drivers-must-know\/\">emissions<\/a> test<\/p>\n<\/li>\n<li data-section-id=\"1757mwn\" data-start=\"1170\" data-end=\"1215\">\n<p data-start=\"1172\" data-end=\"1215\">no major drivability issues (in most cases)<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1217\" data-end=\"1282\">Important: This code often does NOT affect how the <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/electric-car-range-2026-real-conditions-explained\/\">car<\/a> drives.<\/p>\n<hr data-start=\"1284\" data-end=\"1287\" \/>\n<h2 data-section-id=\"1qen04m\" data-start=\"1289\" data-end=\"1314\">Common Causes of P0140<\/h2>\n<p data-start=\"1316\" data-end=\"1339\">Typical causes include:<\/p>\n<ul data-start=\"1341\" data-end=\"1564\">\n<li data-section-id=\"1919b87\" data-start=\"1341\" data-end=\"1386\">\n<p data-start=\"1343\" data-end=\"1386\">faulty downstream O2 sensor (most common)<\/p>\n<\/li>\n<li data-section-id=\"b5q1wx\" data-start=\"1387\" data-end=\"1421\">\n<p data-start=\"1389\" data-end=\"1421\">damaged wiring or open circuit<\/p>\n<\/li>\n<li data-section-id=\"14zzuiy\" data-start=\"1422\" data-end=\"1453\">\n<p data-start=\"1424\" data-end=\"1453\">loose or corroded connector<\/p>\n<\/li>\n<li data-section-id=\"18xevb\" data-start=\"1454\" data-end=\"1493\">\n<p data-start=\"1456\" data-end=\"1493\">blown fuse (heater circuit related)<\/p>\n<\/li>\n<li data-section-id=\"kvn0bd\" data-start=\"1494\" data-end=\"1521\">\n<p data-start=\"1496\" data-end=\"1521\">ECU signal issue (rare)<\/p>\n<\/li>\n<li data-section-id=\"fhw0mz\" data-start=\"1522\" data-end=\"1564\">\n<p data-start=\"1524\" data-end=\"1564\">catalytic converter issues (less common)<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"1566\" data-end=\"1569\" \/>\n<h2 data-section-id=\"1a4mwcz\" data-start=\"1571\" data-end=\"1599\">How Serious Is Code P0140<\/h2>\n<p data-start=\"1601\" data-end=\"1633\">Severity: <strong data-start=\"1614\" data-end=\"1633\">Low to Moderate<\/strong><\/p>\n<ul data-start=\"1635\" data-end=\"1739\">\n<li data-section-id=\"1kbppiv\" data-start=\"1635\" data-end=\"1671\">\n<p data-start=\"1637\" data-end=\"1671\">vehicle usually remains drivable<\/p>\n<\/li>\n<li data-section-id=\"u84oeb\" data-start=\"1672\" data-end=\"1698\">\n<p data-start=\"1674\" data-end=\"1698\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/wet-vs-dry-timing-belt-what-drivers-must-know\/\">emissions<\/a> may increase<\/p>\n<\/li>\n<li data-section-id=\"r8l3wl\" data-start=\"1699\" data-end=\"1739\">\n<p data-start=\"1701\" data-end=\"1739\">long-term issues possible if ignored<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"1741\" data-end=\"1744\" \/>\n<h2 data-section-id=\"1ebaww7\" data-start=\"1746\" data-end=\"1770\">How to Diagnose P0140<\/h2>\n<p data-start=\"1772\" data-end=\"1804\">Professional diagnosis includes:<\/p>\n<ol data-start=\"1806\" data-end=\"2026\">\n<li data-section-id=\"1ja7n1h\" data-start=\"1806\" data-end=\"1841\">\n<p data-start=\"1809\" data-end=\"1841\">Scan for <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/obd2-winter-codes-what-they-mean-and-why-they-appear\/\">codes<\/a> using <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0229-code-throttle-pedal-position-sensor-c-intermittent\/\">OBD2<\/a> tool<\/p>\n<\/li>\n<li data-section-id=\"t4nzms\" data-start=\"1842\" data-end=\"1885\">\n<p data-start=\"1845\" data-end=\"1885\">Check live data for O2 sensor activity<\/p>\n<\/li>\n<li data-section-id=\"yjui0p\" data-start=\"1886\" data-end=\"1920\">\n<p data-start=\"1889\" data-end=\"1920\">Inspect wiring and connectors<\/p>\n<\/li>\n<li data-section-id=\"19amgdv\" data-start=\"1921\" data-end=\"1948\">\n<p data-start=\"1924\" data-end=\"1948\">Measure sensor voltage<\/p>\n<\/li>\n<li data-section-id=\"117ro44\" data-start=\"1949\" data-end=\"1983\">\n<p data-start=\"1952\" data-end=\"1983\">Check sensor heater operation<\/p>\n<\/li>\n<li data-section-id=\"1owt1v\" data-start=\"1984\" data-end=\"2026\">\n<p data-start=\"1987\" data-end=\"2026\">Inspect catalytic converter if needed<\/p>\n<\/li>\n<\/ol>\n<p data-start=\"2028\" data-end=\"2081\">A flat signal (no fluctuation) confirms the issue.<\/p>\n<hr data-start=\"2083\" data-end=\"2086\" \/>\n<h2 data-section-id=\"fx0lfl\" data-start=\"2088\" data-end=\"2112\">How to Fix Code P0140<\/h2>\n<p data-start=\"2114\" data-end=\"2138\">Common repair solutions:<\/p>\n<ul data-start=\"2140\" data-end=\"2298\">\n<li data-section-id=\"7hfkgx\" data-start=\"2140\" data-end=\"2172\">\n<p data-start=\"2142\" data-end=\"2172\">replace downstream O2 sensor<\/p>\n<\/li>\n<li data-section-id=\"8gswok\" data-start=\"2173\" data-end=\"2204\">\n<p data-start=\"2175\" data-end=\"2204\">repair wiring or connectors<\/p>\n<\/li>\n<li data-section-id=\"et1djc\" data-start=\"2205\" data-end=\"2241\">\n<p data-start=\"2207\" data-end=\"2241\">check and replace fuse if needed<\/p>\n<\/li>\n<li data-section-id=\"14stuuo\" data-start=\"2242\" data-end=\"2271\">\n<p data-start=\"2244\" data-end=\"2271\">clean electrical contacts<\/p>\n<\/li>\n<li data-section-id=\"cvqfxz\" data-start=\"2272\" data-end=\"2298\">\n<p data-start=\"2274\" data-end=\"2298\">reset ECU after repair<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2300\" data-end=\"2360\">In most cases \u2192 <strong data-start=\"2319\" data-end=\"2360\">sensor replacement solves the problem<\/strong><\/p>\n<hr data-start=\"2362\" data-end=\"2365\" \/>\n<h2 data-section-id=\"1dcwvgk\" data-start=\"2367\" data-end=\"2396\">Vehicles Commonly Affected<\/h2>\n<p data-start=\"2398\" data-end=\"2440\">The <strong data-start=\"2402\" data-end=\"2416\">P0140 code<\/strong> appears on many brands:<\/p>\n<ul data-start=\"2442\" data-end=\"2525\">\n<li data-section-id=\"16yn0uo\" data-start=\"2442\" data-end=\"2449\">\n<p data-start=\"2444\" data-end=\"2449\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/bmw-art-car-world-tour-expands-to-romania\/\">BMW<\/a><\/p>\n<\/li>\n<li data-section-id=\"1wjv8mp\" data-start=\"2450\" data-end=\"2458\">\n<p data-start=\"2452\" data-end=\"2458\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/engines\/audi\/\">Audi<\/a><\/p>\n<\/li>\n<li data-section-id=\"19mc7gf\" data-start=\"2459\" data-end=\"2473\">\n<p data-start=\"2461\" data-end=\"2473\">Volkswagen<\/p>\n<\/li>\n<li data-section-id=\"1sstvq6\" data-start=\"2474\" data-end=\"2482\">\n<p data-start=\"2476\" data-end=\"2482\">Opel<\/p>\n<\/li>\n<li data-section-id=\"1xwxs7r\" data-start=\"2483\" data-end=\"2491\">\n<p data-start=\"2485\" data-end=\"2491\">Ford<\/p>\n<\/li>\n<li data-section-id=\"kxa3e8\" data-start=\"2492\" data-end=\"2502\">\n<p data-start=\"2494\" data-end=\"2502\">Toyota<\/p>\n<\/li>\n<li data-section-id=\"ibrl1c\" data-start=\"2503\" data-end=\"2513\">\n<p data-start=\"2505\" data-end=\"2513\">Nissan<\/p>\n<\/li>\n<li data-section-id=\"154nwq6\" data-start=\"2514\" data-end=\"2525\">\n<p data-start=\"2516\" data-end=\"2525\">Hyundai<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"2527\" data-end=\"2530\" \/>\n<h2 data-section-id=\"1pmu6oh\" data-start=\"2532\" data-end=\"2559\">Can You Drive With P0140<\/h2>\n<p data-start=\"2561\" data-end=\"2592\">Yes, you can <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/%f0%9f%94%a7-car-drive-shafts-everything-you-need-to-know\/\">drive<\/a> the vehicle.<\/p>\n<p data-start=\"2594\" data-end=\"2602\">However:<\/p>\n<ul data-start=\"2603\" data-end=\"2697\">\n<li data-section-id=\"u84oeb\" data-start=\"2603\" data-end=\"2629\">\n<p data-start=\"2605\" data-end=\"2629\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/wet-vs-dry-timing-belt-what-drivers-must-know\/\">emissions<\/a> may increase<\/p>\n<\/li>\n<li data-section-id=\"kpobnl\" data-start=\"2630\" data-end=\"2667\">\n<p data-start=\"2632\" data-end=\"2667\">fuel efficiency may drop slightly<\/p>\n<\/li>\n<li data-section-id=\"1q29g4k\" data-start=\"2668\" data-end=\"2697\">\n<p data-start=\"2670\" data-end=\"2697\">inspection tests may fail<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"2699\" data-end=\"2702\" \/>\n<h2 data-section-id=\"e9pjyq\" data-start=\"2704\" data-end=\"2730\">P0140 vs Other O2 Codes<\/h2>\n<ul data-start=\"2732\" data-end=\"2869\">\n<li data-section-id=\"1crr70p\" data-start=\"2732\" data-end=\"2776\">\n<p data-start=\"2734\" data-end=\"2776\"><strong data-start=\"2734\" data-end=\"2749\">P0130\u2013P0135<\/strong> \u2192 upstream sensor issues<\/p>\n<\/li>\n<li data-section-id=\"z65ngb\" data-start=\"2777\" data-end=\"2822\">\n<p data-start=\"2779\" data-end=\"2822\"><strong data-start=\"2779\" data-end=\"2788\">P0140<\/strong> \u2192 downstream sensor no activity<\/p>\n<\/li>\n<li data-section-id=\"1ixa4vb\" data-start=\"2823\" data-end=\"2869\">\n<p data-start=\"2825\" data-end=\"2869\"><strong data-start=\"2825\" data-end=\"2834\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0420-code-opel-real-causes-quick-fixes\/\">P0420<\/a><\/strong> \u2192 catalytic converter efficiency<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2871\" data-end=\"2898\">\u00a0These are often related.<\/p>\n<hr data-start=\"2900\" data-end=\"2903\" \/>\n<h2 data-section-id=\"9961x4\" data-start=\"2905\" data-end=\"2924\">FAQ \u2013 P0140 Code<\/h2>\n<h3 data-section-id=\"1impx6i\" data-start=\"2926\" data-end=\"2960\">Does P0140 affect performance?<\/h3>\n<p data-start=\"2962\" data-end=\"3013\">Usually no. It mainly affects <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/wet-vs-dry-timing-belt-what-drivers-must-know\/\">emissions<\/a> monitoring.<\/p>\n<h3 data-section-id=\"p9tgks\" data-start=\"3015\" data-end=\"3040\">Is it safe to ignore?<\/h3>\n<p data-start=\"3042\" data-end=\"3084\">Short-term yes, long-term not recommended.<\/p>\n<h3 data-section-id=\"xfsc4d\" data-start=\"3086\" data-end=\"3119\">How much does it cost to fix?<\/h3>\n<ul data-start=\"3121\" data-end=\"3184\">\n<li data-section-id=\"1q3ayy\" data-start=\"3121\" data-end=\"3157\">\n<p data-start=\"3123\" data-end=\"3157\">O2 sensor: relatively affordable<\/p>\n<\/li>\n<li data-section-id=\"5efr9q\" data-start=\"3158\" data-end=\"3184\">\n<p data-start=\"3160\" data-end=\"3184\">labor: low to moderate<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"3186\" data-end=\"3189\" \/>\n<h2 data-section-id=\"6zcwlh\" data-start=\"3191\" data-end=\"3201\">Pro Tip<\/h2>\n<p data-start=\"3203\" data-end=\"3223\">\u00a0If you also have:<\/p>\n<ul data-start=\"3224\" data-end=\"3253\">\n<li data-section-id=\"1sxx0am\" data-start=\"3224\" data-end=\"3233\">\n<p data-start=\"3226\" data-end=\"3233\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0420-code-opel-real-causes-quick-fixes\/\">P0420<\/a><\/p>\n<\/li>\n<li data-section-id=\"1sx3vj0\" data-start=\"3234\" data-end=\"3243\">\n<p data-start=\"3236\" data-end=\"3243\">P0136<\/p>\n<\/li>\n<li data-section-id=\"1sx7ke4\" data-start=\"3244\" data-end=\"3253\">\n<p data-start=\"3246\" data-end=\"3253\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0141-code-o2-sensor-heater-circuit-malfunction\/\">P0141<\/a><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"3255\" data-end=\"3321\">Check the <strong data-start=\"3265\" data-end=\"3299\">catalytic converter AND wiring<\/strong>, not just the sensor.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The P0140 code indicates that the oxygen sensor (O2 sensor) located on Bank 1 Sensor 2 is showing no activity. This sensor is positioned after the catalytic converter (downstream sensor) and its main role is to monitor catalytic converter efficiency, not to control fuel mixture like the upstream sensor. When the Engine Control Unit (ECU) [&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":[36299,36841,41073,36339,45999,46039,46001,45463,46021,46005,42874],"class_list":["post-40278","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-obd2-en","tag-bam","tag-car-diagnostics","tag-check-engine","tag-diagnoza","tag-engine-codes","tag-engine-fault-code","tag-obd2","tag-obd2-code","tag-p0140","tag-powertrain","tag-vehicle-diagnostics"],"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>P0140 Code \u2013 O2 Sensor Circuit No Activity Detected - Diagnoza BAM<\/title>\n<meta name=\"description\" content=\"P0140 code indicates a fault in the monitored system. 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Normally, the sensor should: rapidly switch voltage between lean and rich respond instantly 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":40281,"url":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0142-code-o2-sensor-circuit-malfunction\/","url_meta":{"origin":40278,"position":3},"title":"P0142 Code \u2013 O2 Sensor Circuit Malfunction","author":"Bejenaru Alexandru Ionut","date":"31 martie 2026","format":false,"excerpt":"The P0142 OBD2 code indicates a malfunction in the oxygen sensor circuit for Bank 1 Sensor 3. This sensor is typically located further downstream in the exhaust system, after the catalytic converter. Not all vehicles are equipped with a third oxygen sensor, but on those that are, it plays a\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":40131,"url":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0157-code-o2-sensor-circuit-low-voltage\/","url_meta":{"origin":40278,"position":4},"title":"P0157 Code \u2013 O2 Sensor Circuit Low Voltage","author":"Bejenaru Alexandru Ionut","date":"28 martie 2026","format":false,"excerpt":"The P0157 diagnostic trouble code indicates that the Engine Control Unit (ECU) has detected a low voltage signal from the oxygen (O2) sensor located on Bank 2 Sensor 2. This sensor is positioned downstream of the catalytic converter and is used to monitor catalytic converter efficiency. Under normal conditions, the\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":40280,"url":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0141-code-o2-sensor-heater-circuit-malfunction\/","url_meta":{"origin":40278,"position":5},"title":"P0141 Code \u2013 O2 Sensor Heater Circuit Malfunction","author":"Bejenaru Alexandru Ionut","date":"31 martie 2026","format":false,"excerpt":"The P0141 OBD2 code indicates a malfunction in the heater circuit of the oxygen sensor (O2 sensor) located on Bank 1 Sensor 2. This is the downstream oxygen sensor, positioned after the catalytic converter. Its role is to monitor exhaust gases and verify catalytic converter efficiency. Modern oxygen sensors are\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":[]}],"jetpack_likes_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/pf97go-atE","jetpack_sharing_enabled":true,"pll_sync_post":[],"_links":{"self":[{"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/posts\/40278","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=40278"}],"version-history":[{"count":1,"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/posts\/40278\/revisions"}],"predecessor-version":[{"id":40279,"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/posts\/40278\/revisions\/40279"}],"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=40278"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/categories?post=40278"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/tags?post=40278"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}