{"id":40282,"date":"2026-03-31T04:58:05","date_gmt":"2026-03-31T02:58:05","guid":{"rendered":"https:\/\/diagnozabam.ro\/sfaturi\/?p=40282"},"modified":"2026-03-31T04:58:05","modified_gmt":"2026-03-31T02:58:05","slug":"p0143-code-o2-sensor-circuit-low-voltage","status":"publish","type":"post","link":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0143-code-o2-sensor-circuit-low-voltage\/","title":{"rendered":"P0143 Code \u2013 O2 Sensor Circuit Low Voltage"},"content":{"rendered":"<p data-start=\"162\" data-end=\"325\">The <strong data-start=\"166\" data-end=\"185\">P0143 <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0229-code-throttle-pedal-position-sensor-c-intermittent\/\">OBD2<\/a> code<\/strong> indicates that the <strong data-start=\"205\" data-end=\"253\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0134-code-o2-sensor-circuit-no-activity-detected\/\">oxygen sensor<\/a> (O2 sensor) on Bank 1 Sensor 3<\/strong> is reporting a <strong data-start=\"269\" data-end=\"291\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/obd2-winter-codes-what-they-mean-and-why-they-appear\/\">low voltage<\/a> signal<\/strong> to the Engine Control Unit (ECU).<\/p>\n<p data-start=\"327\" data-end=\"509\">This sensor is positioned <strong data-start=\"353\" data-end=\"389\">downstream in the <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/exhaust-smoke-colors\/\">exhaust<\/a> system<\/strong>, typically after the catalytic converter. Its role is to monitor <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/exhaust-smoke-colors\/\">exhaust<\/a> gases and confirm emission system performance.<\/p>\n<p data-start=\"511\" data-end=\"559\">Normal <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0134-code-o2-sensor-circuit-no-activity-detected\/\">oxygen sensor<\/a> voltage fluctuates between:<\/p>\n<ul data-start=\"560\" data-end=\"611\">\n<li data-section-id=\"1z0ofp8\" data-start=\"560\" data-end=\"585\">\n<p data-start=\"562\" data-end=\"585\"><strong data-start=\"562\" data-end=\"585\">0.1V (lean mixture)<\/strong><\/p>\n<\/li>\n<li data-section-id=\"1yd8of6\" data-start=\"586\" data-end=\"611\">\n<p data-start=\"588\" data-end=\"611\"><strong data-start=\"588\" data-end=\"611\">0.9V (rich mixture)<\/strong><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"613\" data-end=\"752\">When the ECU detects that the signal remains consistently <strong data-start=\"671\" data-end=\"719\">too low (lean condition or no proper signal)<\/strong>, it triggers the <strong data-start=\"737\" data-end=\"751\">P0143 code<\/strong>.<\/p>\n<hr data-start=\"754\" data-end=\"757\" \/>\n<h2 data-section-id=\"1l9isdx\" data-start=\"759\" data-end=\"787\">How Bank 1 Sensor 3 Works<\/h2>\n<p data-start=\"789\" data-end=\"805\">Bank 1 Sensor 3:<\/p>\n<ul data-start=\"806\" data-end=\"926\">\n<li data-section-id=\"3e5cde\" data-start=\"806\" data-end=\"846\">\n<p data-start=\"808\" data-end=\"846\">monitors post-catalyst <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/exhaust-smoke-colors\/\">exhaust<\/a> gases<\/p>\n<\/li>\n<li data-section-id=\"11vq44l\" data-start=\"847\" data-end=\"886\">\n<p data-start=\"849\" data-end=\"886\">reacts slower than upstream sensors<\/p>\n<\/li>\n<li data-section-id=\"1q4tey1\" data-start=\"887\" data-end=\"926\">\n<p data-start=\"889\" data-end=\"926\">ensures <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/wet-vs-dry-timing-belt-what-drivers-must-know\/\">emissions<\/a> system efficiency<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"928\" data-end=\"1020\">It does not directly control the air-fuel ratio but provides feedback for system validation.<\/p>\n<hr data-start=\"1022\" data-end=\"1025\" \/>\n<h2 data-section-id=\"1su7xuw\" data-start=\"1027\" data-end=\"1047\">Symptoms of P0143<\/h2>\n<p data-start=\"1049\" data-end=\"1090\">Most vehicles will show limited symptoms:<\/p>\n<ul data-start=\"1092\" data-end=\"1224\">\n<li data-section-id=\"13qodzz\" data-start=\"1092\" data-end=\"1117\">\n<p data-start=\"1094\" data-end=\"1117\"><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=\"xblqqh\" data-start=\"1118\" data-end=\"1153\">\n<p data-start=\"1120\" data-end=\"1153\">possible <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/wet-vs-dry-timing-belt-what-drivers-must-know\/\">emissions<\/a> test failure<\/p>\n<\/li>\n<li data-section-id=\"9nxlhp\" data-start=\"1154\" data-end=\"1192\">\n<p data-start=\"1156\" data-end=\"1192\">slight decrease in fuel efficiency<\/p>\n<\/li>\n<li data-section-id=\"sjzx77\" data-start=\"1193\" data-end=\"1224\">\n<p data-start=\"1195\" data-end=\"1224\">no major drivability issues<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1226\" data-end=\"1271\">In some cases, no noticeable symptoms appear.<\/p>\n<hr data-start=\"1273\" data-end=\"1276\" \/>\n<h2 data-section-id=\"1qen04l\" data-start=\"1278\" data-end=\"1303\">Common Causes of P0143<\/h2>\n<p data-start=\"1305\" data-end=\"1328\">Typical causes include:<\/p>\n<ul data-start=\"1330\" data-end=\"1517\">\n<li data-section-id=\"l10ud5\" data-start=\"1330\" data-end=\"1364\">\n<p data-start=\"1332\" data-end=\"1364\">faulty O2 sensor (most common)<\/p>\n<\/li>\n<li data-section-id=\"nufm1h\" data-start=\"1365\" data-end=\"1398\">\n<p data-start=\"1367\" data-end=\"1398\">wiring damage or open circuit<\/p>\n<\/li>\n<li data-section-id=\"efd0s2\" data-start=\"1399\" data-end=\"1429\">\n<p data-start=\"1401\" data-end=\"1429\">poor electrical connection<\/p>\n<\/li>\n<li data-section-id=\"1ty39l\" data-start=\"1430\" data-end=\"1463\">\n<p data-start=\"1432\" data-end=\"1463\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/exhaust-smoke-colors\/\">exhaust<\/a> leaks near the sensor<\/p>\n<\/li>\n<li data-section-id=\"p2lmcd\" data-start=\"1464\" data-end=\"1498\">\n<p data-start=\"1466\" data-end=\"1498\">low signal due to sensor aging<\/p>\n<\/li>\n<li data-section-id=\"4htujr\" data-start=\"1499\" data-end=\"1517\">\n<p data-start=\"1501\" data-end=\"1517\">ECU issue (rare)<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"1519\" data-end=\"1522\" \/>\n<h2 data-section-id=\"1a4mwcw\" data-start=\"1524\" data-end=\"1552\">How Serious Is Code P0143<\/h2>\n<p data-start=\"1554\" data-end=\"1583\">Severity: <strong data-start=\"1564\" data-end=\"1583\">Low to Moderate<\/strong><\/p>\n<ul data-start=\"1585\" data-end=\"1692\">\n<li data-section-id=\"9bsfa4\" data-start=\"1585\" data-end=\"1613\">\n<p data-start=\"1587\" data-end=\"1613\">vehicle remains drivable<\/p>\n<\/li>\n<li data-section-id=\"u84oeb\" data-start=\"1614\" data-end=\"1640\">\n<p data-start=\"1616\" data-end=\"1640\"><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=\"qn02w4\" data-start=\"1641\" data-end=\"1692\">\n<p data-start=\"1643\" data-end=\"1692\">long-term neglect may affect system diagnostics<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"1694\" data-end=\"1697\" \/>\n<h2 data-section-id=\"1ebaww4\" data-start=\"1699\" data-end=\"1723\">How to Diagnose P0143<\/h2>\n<p data-start=\"1725\" data-end=\"1743\">Diagnosis process:<\/p>\n<ol data-start=\"1745\" data-end=\"1965\">\n<li data-section-id=\"16cj4li\" data-start=\"1745\" data-end=\"1781\">\n<p data-start=\"1748\" data-end=\"1781\">Scan vehicle using <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0229-code-throttle-pedal-position-sensor-c-intermittent\/\">OBD2<\/a> scanner<\/p>\n<\/li>\n<li data-section-id=\"1km0djq\" data-start=\"1782\" data-end=\"1821\">\n<p data-start=\"1785\" data-end=\"1821\">Check live data for sensor voltage<\/p>\n<\/li>\n<li data-section-id=\"yjui0p\" data-start=\"1822\" data-end=\"1856\">\n<p data-start=\"1825\" data-end=\"1856\">Inspect wiring and connectors<\/p>\n<\/li>\n<li data-section-id=\"symgfo\" data-start=\"1857\" data-end=\"1893\">\n<p data-start=\"1860\" data-end=\"1893\">Test voltage output from sensor<\/p>\n<\/li>\n<li data-section-id=\"ez9xol\" data-start=\"1894\" data-end=\"1924\">\n<p data-start=\"1897\" data-end=\"1924\">Inspect <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/exhaust-smoke-colors\/\">exhaust<\/a> for leaks<\/p>\n<\/li>\n<li data-section-id=\"5ayg7s\" data-start=\"1925\" data-end=\"1965\">\n<p data-start=\"1928\" data-end=\"1965\">Compare readings with other sensors<\/p>\n<\/li>\n<\/ol>\n<p data-start=\"1967\" data-end=\"2003\">A faulty sensor will typically show:<\/p>\n<ul data-start=\"2004\" data-end=\"2047\">\n<li data-section-id=\"rgukv4\" data-start=\"2004\" data-end=\"2028\">\n<p data-start=\"2006\" data-end=\"2028\">constant <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/obd2-winter-codes-what-they-mean-and-why-they-appear\/\">low voltage<\/a><\/p>\n<\/li>\n<li data-section-id=\"1f1emtl\" data-start=\"2029\" data-end=\"2047\">\n<p data-start=\"2031\" data-end=\"2047\">no fluctuation<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"2049\" data-end=\"2052\" \/>\n<h2 data-section-id=\"fx0lfm\" data-start=\"2054\" data-end=\"2078\">How to Fix Code P0143<\/h2>\n<p data-start=\"2080\" data-end=\"2104\">Common repair solutions:<\/p>\n<ul data-start=\"2106\" data-end=\"2258\">\n<li data-section-id=\"1sf158l\" data-start=\"2106\" data-end=\"2149\">\n<p data-start=\"2108\" data-end=\"2149\">replace the O2 sensor (Bank 1 Sensor 3)<\/p>\n<\/li>\n<li data-section-id=\"1yg6uso\" data-start=\"2150\" data-end=\"2178\">\n<p data-start=\"2152\" data-end=\"2178\">repair or replace wiring<\/p>\n<\/li>\n<li data-section-id=\"j4ipvb\" data-start=\"2179\" data-end=\"2209\">\n<p data-start=\"2181\" data-end=\"2209\">clean or secure connectors<\/p>\n<\/li>\n<li data-section-id=\"wa4euh\" data-start=\"2210\" data-end=\"2231\">\n<p data-start=\"2212\" data-end=\"2231\">fix <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/exhaust-smoke-colors\/\">exhaust<\/a> leaks<\/p>\n<\/li>\n<li data-section-id=\"cvqfxz\" data-start=\"2232\" data-end=\"2258\">\n<p data-start=\"2234\" data-end=\"2258\">reset ECU after repair<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"2260\" data-end=\"2263\" \/>\n<h2 data-section-id=\"1dcwvgk\" data-start=\"2265\" data-end=\"2294\">Vehicles Commonly Affected<\/h2>\n<p data-start=\"2296\" data-end=\"2360\">This code appears on vehicles equipped with multiple O2 sensors:<\/p>\n<ul data-start=\"2362\" data-end=\"2431\">\n<li data-section-id=\"16yn0uo\" data-start=\"2362\" data-end=\"2369\">\n<p data-start=\"2364\" data-end=\"2369\"><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=\"2370\" data-end=\"2378\">\n<p data-start=\"2372\" data-end=\"2378\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/engines\/audi\/\">Audi<\/a><\/p>\n<\/li>\n<li data-section-id=\"19mc7gf\" data-start=\"2379\" data-end=\"2393\">\n<p data-start=\"2381\" data-end=\"2393\">Volkswagen<\/p>\n<\/li>\n<li data-section-id=\"1xwxs7r\" data-start=\"2394\" data-end=\"2402\">\n<p data-start=\"2396\" data-end=\"2402\">Ford<\/p>\n<\/li>\n<li data-section-id=\"kxa3e8\" data-start=\"2403\" data-end=\"2413\">\n<p data-start=\"2405\" data-end=\"2413\">Toyota<\/p>\n<\/li>\n<li data-section-id=\"1xesam0\" data-start=\"2414\" data-end=\"2431\">\n<p data-start=\"2416\" data-end=\"2431\">Mercedes-Benz<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"2433\" data-end=\"2436\" \/>\n<h2 data-section-id=\"1pmu6oi\" data-start=\"2438\" data-end=\"2465\">Can You Drive With P0143<\/h2>\n<p data-start=\"2467\" data-end=\"2498\">Yes, the vehicle can be driven.<\/p>\n<p data-start=\"2500\" data-end=\"2508\">However:<\/p>\n<ul data-start=\"2509\" data-end=\"2625\">\n<li data-section-id=\"ur1gmn\" data-start=\"2509\" data-end=\"2557\">\n<p data-start=\"2511\" data-end=\"2557\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/wet-vs-dry-timing-belt-what-drivers-must-know\/\">emissions<\/a> system performance may be affected<\/p>\n<\/li>\n<li data-section-id=\"1q29g4k\" data-start=\"2558\" data-end=\"2587\">\n<p data-start=\"2560\" data-end=\"2587\">inspection tests may fail<\/p>\n<\/li>\n<li data-section-id=\"4yserl\" data-start=\"2588\" data-end=\"2625\">\n<p data-start=\"2590\" data-end=\"2625\">long-term efficiency may decrease<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"2627\" data-end=\"2630\" \/>\n<h2 data-section-id=\"x7qm7b\" data-start=\"2632\" data-end=\"2657\">P0143 vs Related Codes<\/h2>\n<ul data-start=\"2659\" data-end=\"2751\">\n<li data-section-id=\"duj94t\" data-start=\"2659\" data-end=\"2694\">\n<p data-start=\"2661\" data-end=\"2694\"><strong data-start=\"2661\" data-end=\"2670\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0142-code-o2-sensor-circuit-malfunction\/\">P0142<\/a><\/strong> \u2013 circuit malfunction<\/p>\n<\/li>\n<li data-section-id=\"q76rgb\" data-start=\"2695\" data-end=\"2722\">\n<p data-start=\"2697\" data-end=\"2722\"><strong data-start=\"2697\" data-end=\"2706\">P0143<\/strong> \u2013 <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/obd2-winter-codes-what-they-mean-and-why-they-appear\/\">low voltage<\/a><\/p>\n<\/li>\n<li data-section-id=\"1l71wxy\" data-start=\"2723\" data-end=\"2751\">\n<p data-start=\"2725\" data-end=\"2751\"><strong data-start=\"2725\" data-end=\"2734\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0144-code-o2-sensor-circuit-high-voltage\/\">P0144<\/a><\/strong> \u2013 high voltage<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2753\" data-end=\"2818\">These <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/obd2-winter-codes-what-they-mean-and-why-they-appear\/\">codes<\/a> indicate different signal issues for the same sensor.<\/p>\n<hr data-start=\"2820\" data-end=\"2823\" \/>\n<h2 data-section-id=\"8na6aj\" data-start=\"2825\" data-end=\"2844\">FAQ \u2013 P0143 Code<\/h2>\n<h3 data-section-id=\"vjhvrd\" data-start=\"2846\" data-end=\"2892\">Does this mean the engine is running lean?<\/h3>\n<p data-start=\"2894\" data-end=\"2946\">Not necessarily. It may be a sensor or wiring issue.<\/p>\n<h3 data-section-id=\"xblm6a\" data-start=\"2948\" data-end=\"2983\">Is sensor replacement required?<\/h3>\n<p data-start=\"2985\" data-end=\"3004\">In most cases, yes.<\/p>\n<h3 data-section-id=\"e655qr\" data-start=\"3006\" data-end=\"3037\">Can wiring cause this code?<\/h3>\n<p data-start=\"3039\" data-end=\"3089\">Yes, especially open circuits or poor connections.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The P0143 OBD2 code indicates that the oxygen sensor (O2 sensor) on Bank 1 Sensor 3 is reporting a low voltage signal to the Engine Control Unit (ECU). This sensor is positioned downstream in the exhaust system, typically after the catalytic converter. Its role is to monitor exhaust gases and confirm emission system performance. Normal [&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":[36299,36841,41073,36339,45999,46039,46001,45463,46193,46005,42874],"class_list":["post-40282","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-p0143","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>P0143 Code \u2013 O2 Sensor Circuit Low Voltage - Diagnoza BAM<\/title>\n<meta name=\"description\" content=\"P0143 code indicates a fault in the monitored system. Learn causes, symptoms, diagnostics and repair solutions.\" \/>\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\/p0143-code-o2-sensor-circuit-low-voltage\/\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0143 Code \u2013 O2 Sensor Circuit Low Voltage\" \/>\n<meta property=\"og:description\" content=\"P0143 code indicates a fault in the monitored system. Learn causes, symptoms, diagnostics and repair solutions.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0143-code-o2-sensor-circuit-low-voltage\/\" \/>\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=\"2026-03-31T02:58:05+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=\"3 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"NewsArticle\",\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/p0143-code-o2-sensor-circuit-low-voltage\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/p0143-code-o2-sensor-circuit-low-voltage\\\/\"},\"author\":{\"name\":\"Bejenaru Alexandru Ionut\",\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/#\\\/schema\\\/person\\\/77202adf825f4528d9ba9ab5b4ffafec\"},\"headline\":\"P0143 Code \u2013 O2 Sensor Circuit Low Voltage\",\"datePublished\":\"2026-03-31T02:58:05+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/p0143-code-o2-sensor-circuit-low-voltage\\\/\"},\"wordCount\":398,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/p0143-code-o2-sensor-circuit-low-voltage\\\/#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\":[\"bam\",\"car diagnostics\",\"check engine\",\"diagnoza\",\"engine codes\",\"engine fault code\",\"obd2\",\"obd2 code\",\"p0143\",\"powertrain\",\"vehicle diagnostics\"],\"articleSection\":[\"OBD2-EN\"],\"inLanguage\":\"ro-RO\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/p0143-code-o2-sensor-circuit-low-voltage\\\/#respond\"]}],\"copyrightYear\":\"2026\",\"copyrightHolder\":{\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/p0143-code-o2-sensor-circuit-low-voltage\\\/\",\"url\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/p0143-code-o2-sensor-circuit-low-voltage\\\/\",\"name\":\"P0143 Code \u2013 O2 Sensor Circuit Low Voltage - Diagnoza BAM\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/p0143-code-o2-sensor-circuit-low-voltage\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/p0143-code-o2-sensor-circuit-low-voltage\\\/#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\":\"2026-03-31T02:58:05+00:00\",\"description\":\"P0143 code indicates a fault in the monitored system. Learn causes, symptoms, diagnostics and repair solutions.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/p0143-code-o2-sensor-circuit-low-voltage\\\/#breadcrumb\"},\"inLanguage\":\"ro-RO\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/p0143-code-o2-sensor-circuit-low-voltage\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"ro-RO\",\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/p0143-code-o2-sensor-circuit-low-voltage\\\/#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\\\/p0143-code-o2-sensor-circuit-low-voltage\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"P0143 Code \u2013 O2 Sensor Circuit Low Voltage\"}]},{\"@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":"P0143 Code \u2013 O2 Sensor Circuit Low Voltage - Diagnoza BAM","description":"P0143 code indicates a fault in the monitored system. Learn causes, symptoms, diagnostics and repair solutions.","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\/p0143-code-o2-sensor-circuit-low-voltage\/","og_locale":"ro_RO","og_type":"article","og_title":"P0143 Code \u2013 O2 Sensor Circuit Low Voltage","og_description":"P0143 code indicates a fault in the monitored system. Learn causes, symptoms, diagnostics and repair solutions.","og_url":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0143-code-o2-sensor-circuit-low-voltage\/","og_site_name":"Diagnoza BAM","article_publisher":"https:\/\/www.facebook.com\/diagnozabam","article_published_time":"2026-03-31T02:58:05+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":"3 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"NewsArticle","@id":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0143-code-o2-sensor-circuit-low-voltage\/#article","isPartOf":{"@id":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0143-code-o2-sensor-circuit-low-voltage\/"},"author":{"name":"Bejenaru Alexandru Ionut","@id":"https:\/\/diagnozabam.ro\/sfaturi\/#\/schema\/person\/77202adf825f4528d9ba9ab5b4ffafec"},"headline":"P0143 Code \u2013 O2 Sensor Circuit Low Voltage","datePublished":"2026-03-31T02:58:05+00:00","mainEntityOfPage":{"@id":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0143-code-o2-sensor-circuit-low-voltage\/"},"wordCount":398,"commentCount":0,"publisher":{"@id":"https:\/\/diagnozabam.ro\/sfaturi\/#organization"},"image":{"@id":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0143-code-o2-sensor-circuit-low-voltage\/#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":["bam","car diagnostics","check engine","diagnoza","engine codes","engine fault code","obd2","obd2 code","p0143","powertrain","vehicle diagnostics"],"articleSection":["OBD2-EN"],"inLanguage":"ro-RO","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0143-code-o2-sensor-circuit-low-voltage\/#respond"]}],"copyrightYear":"2026","copyrightHolder":{"@id":"https:\/\/diagnozabam.ro\/sfaturi\/#organization"}},{"@type":"WebPage","@id":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0143-code-o2-sensor-circuit-low-voltage\/","url":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0143-code-o2-sensor-circuit-low-voltage\/","name":"P0143 Code \u2013 O2 Sensor Circuit Low Voltage - Diagnoza BAM","isPartOf":{"@id":"https:\/\/diagnozabam.ro\/sfaturi\/#website"},"primaryImageOfPage":{"@id":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0143-code-o2-sensor-circuit-low-voltage\/#primaryimage"},"image":{"@id":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0143-code-o2-sensor-circuit-low-voltage\/#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":"2026-03-31T02:58:05+00:00","description":"P0143 code indicates a fault in the monitored system. Learn causes, symptoms, diagnostics and repair solutions.","breadcrumb":{"@id":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0143-code-o2-sensor-circuit-low-voltage\/#breadcrumb"},"inLanguage":"ro-RO","potentialAction":[{"@type":"ReadAction","target":["https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0143-code-o2-sensor-circuit-low-voltage\/"]}]},{"@type":"ImageObject","inLanguage":"ro-RO","@id":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0143-code-o2-sensor-circuit-low-voltage\/#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\/p0143-code-o2-sensor-circuit-low-voltage\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/diagnozabam.ro\/sfaturi\/"},{"@type":"ListItem","position":2,"name":"P0143 Code \u2013 O2 Sensor Circuit Low Voltage"}]},{"@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":40282},"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":39757,"url":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0137-code-o2-sensor-circuit-low-voltage\/","url_meta":{"origin":40282,"position":0},"title":"P0137 Code \u2013 O2 Sensor Circuit Low Voltage","author":"Bejenaru Alexandru Ionut","date":"24 martie 2026","format":false,"excerpt":"The P0137 diagnostic trouble code (DTC) indicates that the Engine Control Unit (ECU) has detected a low voltage signal from the oxygen sensor on Bank 1 Sensor 2. The downstream oxygen sensor (Sensor 2) is located after the catalytic converter and is used to monitor catalytic converter efficiency and emissions\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":39751,"url":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0132-code-o2-sensor-circuit-high-voltage\/","url_meta":{"origin":40282,"position":1},"title":"P0132 Code \u2013 O2 Sensor Circuit High Voltage","author":"Bejenaru Alexandru Ionut","date":"24 martie 2026","format":false,"excerpt":"The P0132 diagnostic trouble code (DTC) indicates that the Engine Control Unit (ECU) has detected an abnormally high voltage signal from the oxygen sensor circuit on Bank 1 Sensor 1. The oxygen sensor (O2 sensor) measures oxygen levels in exhaust gases and helps the ECU regulate the air-fuel mixture. When\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":40292,"url":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0151-code-o2-sensor-circuit-low-voltage\/","url_meta":{"origin":40282,"position":2},"title":"P0151 Code \u2013 O2 Sensor Circuit Low Voltage","author":"Bejenaru Alexandru Ionut","date":"31 martie 2026","format":false,"excerpt":"The P0151 OBD2 code indicates that the oxygen sensor (O2 sensor) on Bank 2 Sensor 1 is sending a low voltage signal to the Engine Control Unit (ECU). This is the upstream sensor, positioned before the catalytic converter on Bank 2. It plays a key role in regulating the air-fuel\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":40283,"url":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0144-code-o2-sensor-circuit-high-voltage\/","url_meta":{"origin":40282,"position":3},"title":"P0144 Code \u2013 O2 Sensor Circuit High Voltage","author":"Bejenaru Alexandru Ionut","date":"31 martie 2026","format":false,"excerpt":"The P0144 OBD2 code indicates that the oxygen sensor (O2 sensor) on Bank 1 Sensor 3 is sending a high voltage signal to the Engine Control Unit (ECU). This sensor is located downstream of the catalytic converter and is responsible for monitoring emissions performance. Normal O2 sensor voltage range: 0.1V\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":40101,"url":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0131-code-o2-sensor-circuit-low-voltage\/","url_meta":{"origin":40282,"position":4},"title":"P0131 Code \u2013 O2 Sensor Circuit Low Voltage","author":"Bejenaru Alexandru Ionut","date":"27 martie 2026","format":false,"excerpt":"The P0131 diagnostic trouble code (DTC) indicates that the Engine Control Unit (ECU) has detected a low voltage signal from the oxygen (O2) sensor located on Bank 1, Sensor 1. Bank 1 = side of engine with cylinder 1 Sensor 1 = upstream sensor (before catalytic converter) This sensor measures\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":40289,"url":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0145-code-o2-sensor-circuit-slow-response\/","url_meta":{"origin":40282,"position":5},"title":"P0145 Code \u2013 O2 Sensor Circuit Slow Response","author":"Bejenaru Alexandru Ionut","date":"31 martie 2026","format":false,"excerpt":"The P0145 OBD2 code indicates that the oxygen sensor (O2 sensor) on Bank 1 Sensor 3 is responding too slowly to changes in exhaust gas composition. This sensor is located downstream of the catalytic converter and is responsible for monitoring emissions stability and catalytic converter efficiency. Normally, an O2 sensor\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-atI","jetpack_sharing_enabled":true,"pll_sync_post":[],"_links":{"self":[{"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/posts\/40282","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=40282"}],"version-history":[{"count":1,"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/posts\/40282\/revisions"}],"predecessor-version":[{"id":40286,"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/posts\/40282\/revisions\/40286"}],"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=40282"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/categories?post=40282"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/tags?post=40282"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}