{"id":79395,"date":"2025-06-18T13:00:25","date_gmt":"2025-06-18T18:00:25","guid":{"rendered":"https:\/\/www.emanualonline.com\/blog\/?p=79395"},"modified":"2025-06-18T13:14:40","modified_gmt":"2025-06-18T18:14:40","slug":"p20e4-obd2-exhaust-gas-temperature-sensor-2-3-correlation","status":"publish","type":"post","link":"https:\/\/www.emanualonline.com\/blog\/p20e4-obd2-exhaust-gas-temperature-sensor-2-3-correlation","title":{"rendered":"P20E4 OBD2: Exhaust Gas Temperature Sensor 2\/3 Correlation"},"content":{"rendered":"<h2>What Does the P20E4 Code Mean?<\/h2>\n<p>The P20E4 code is an OBD-II diagnostic trouble code that indicates a correlation issue between the Exhaust Gas Temperature (EGT) Sensor 2 and Sensor 3. This code is primarily associated with the vehicle&#8217;s emissions system, particularly the Selective Catalytic Reduction (SCR) system.<\/p>\n<h2>What Causes the P20E4 Code?<\/h2>\n<p>Several factors can trigger the P20E4 code, including:<\/p>\n<ul>\n<li>Exhaust Gas Temperature (EGT) sensor failure<\/li>\n<li>Powertrain Control Module (PCM) failure<\/li>\n<li>Wiring issues affecting the EGT sensors<\/li>\n<\/ul>\n<h2>What Are the Symptoms of the P20E4 Code?<\/h2>\n<p>Common symptoms associated with the P20E4 code may include:<\/p>\n<ul>\n<li>Check Engine Light illuminated<\/li>\n<li>Increased emissions<\/li>\n<li>Reduced engine performance<\/li>\n<li>Potential issues with engine temperature management<\/li>\n<\/ul>\n<h2>How Serious Is the P20E4 Code?<\/h2>\n<p>The P20E4 code is classified as a moderate severity issue. While it may not pose an immediate threat to the vehicle&#8217;s safety or functionality, it is crucial to address it in a timely manner to avoid potential long-term damage.<\/p>\n<h2>How to Diagnose the P20E4 Code<\/h2>\n<p>Diagnosing the P20E4 code involves several steps, including:<\/p>\n<ul>\n<li>Using an OBD-II scanner to confirm the presence of the code.<\/li>\n<li>Inspecting the wiring and connectors associated with the EGT sensors for signs of damage or corrosion.<\/li>\n<li>Testing the EGT sensors to ensure they are functioning properly.<\/li>\n<li>Checking the PCM for faults or updates.<\/li>\n<\/ul>\n<h2>Common Repairs for the P20E4 Code<\/h2>\n<p>Typical repairs for the P20E4 code may include:<\/p>\n<ul>\n<li>Replacing a faulty Exhaust Gas Temperature sensor<\/li>\n<li>Repairing or replacing damaged wiring or connectors<\/li>\n<li>Reprogramming or replacing the Powertrain Control Module (PCM)<\/li>\n<\/ul>\n<h2>How Much Does It Cost to Fix the P20E4 Code?<\/h2>\n<p>The cost to fix the P20E4 code can vary significantly based on the specific repair needed. On average, repairs can range from $100 to $800, depending on whether sensor replacements or PCM reprogramming is required.<\/p>\n<h2>Can I Fix the P20E4 Code Myself?<\/h2>\n<p>While some DIY enthusiasts may be able to perform basic inspections and wiring repairs, it is often recommended to consult with a certified mechanic for accurate diagnosis and repairs, especially when it involves the PCM or EGT sensors.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What Does the P20E4 Code Mean? The P20E4 code is an OBD-II diagnostic trouble code that indicates a correlation issue between the Exhaust Gas Temperature (EGT) Sensor 2 and Sensor 3. This code is primarily associated with the vehicle&#8217;s emissions system, particularly the Selective Catalytic Reduction (SCR) system. What Causes the P20E4 Code? Several factors &hellip;<\/p>\n","protected":false},"author":26,"featured_media":88965,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_uag_custom_page_level_css":"","footnotes":""},"categories":[11987],"tags":[],"class_list":["post-79395","post","type-post","status-publish","format-standard","has-post-thumbnail","","category-p-obd2-codes-powertrain"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.6 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>OBD2 Code P20E4 \u2013 Causes, Symptoms, and Repairs<\/title>\n<meta name=\"description\" content=\"Learn all about the P20E4 code, what causes exhaust gas temperature sensor 2\/3 correlation issues, and how to diagnose and fix common problems to maintain optimal engine performance.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.emanualonline.com\/blog\/p20e4-obd2-exhaust-gas-temperature-sensor-2-3-correlation\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P20E4 OBD2: Exhaust Gas Temperature Sensor 2\/3 Correlation\" \/>\n<meta property=\"og:description\" content=\"What Does the P20E4 Code Mean? 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He also loves cats, Johnny Cash and Subarus.","sameAs":["https:\/\/www.facebook.com\/jee514","https:\/\/www.instagram.com\/rat_in_chief\/","https:\/\/www.linkedin.com\/in\/jean-claude-landry-857781186\/"],"url":"https:\/\/www.emanualonline.com\/blog\/author\/jclandry"}]}},"uagb_featured_image_src":{"full":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p20e4-obd2-exhaust-gas-temperature-sensor-23-correlation.png",1200,675,false],"thumbnail":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p20e4-obd2-exhaust-gas-temperature-sensor-23-correlation-150x150.png",150,150,true],"medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p20e4-obd2-exhaust-gas-temperature-sensor-23-correlation-300x169.png",300,169,true],"medium_large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p20e4-obd2-exhaust-gas-temperature-sensor-23-correlation-768x432.png",618,348,true],"large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p20e4-obd2-exhaust-gas-temperature-sensor-23-correlation-1024x576.png",618,348,true],"1536x1536":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p20e4-obd2-exhaust-gas-temperature-sensor-23-correlation.png",1200,675,false],"2048x2048":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p20e4-obd2-exhaust-gas-temperature-sensor-23-correlation.png",1200,675,false],"tie-small":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p20e4-obd2-exhaust-gas-temperature-sensor-23-correlation-110x75.png",110,75,true],"tie-medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p20e4-obd2-exhaust-gas-temperature-sensor-23-correlation-403x215.png",403,215,true],"tie-large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p20e4-obd2-exhaust-gas-temperature-sensor-23-correlation-310x205.png",310,205,true],"slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p20e4-obd2-exhaust-gas-temperature-sensor-23-correlation-660x330.png",660,330,true],"big-slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p20e4-obd2-exhaust-gas-temperature-sensor-23-correlation-1050x525.png",1050,525,true]},"uagb_author_info":{"display_name":"JC Landry","author_link":"https:\/\/www.emanualonline.com\/blog\/author\/jclandry"},"uagb_comment_info":0,"uagb_excerpt":"What Does the P20E4 Code Mean? The P20E4 code is an OBD-II diagnostic trouble code that indicates a correlation issue between the Exhaust Gas Temperature (EGT) Sensor 2 and Sensor 3. This code is primarily associated with the vehicle&#8217;s emissions system, particularly the Selective Catalytic Reduction (SCR) system. What Causes the P20E4 Code? Several factors&hellip;","_links":{"self":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/79395","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/users\/26"}],"replies":[{"embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/comments?post=79395"}],"version-history":[{"count":3,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/79395\/revisions"}],"predecessor-version":[{"id":88992,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/79395\/revisions\/88992"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media\/88965"}],"wp:attachment":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media?parent=79395"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/categories?post=79395"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/tags?post=79395"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}