{"id":79745,"date":"2025-06-04T15:02:40","date_gmt":"2025-06-04T20:02:40","guid":{"rendered":"https:\/\/www.emanualonline.com\/blog\/?p=79745"},"modified":"2025-06-04T15:07:02","modified_gmt":"2025-06-04T20:07:02","slug":"p242a-obd2-exhaust-gas-temperature-sensor-circuit","status":"publish","type":"post","link":"https:\/\/www.emanualonline.com\/blog\/p242a-obd2-exhaust-gas-temperature-sensor-circuit","title":{"rendered":"P242A OBD2: Exhaust Gas Temperature Sensor Circuit"},"content":{"rendered":"<h2>What Does the P242A Code Mean?<\/h2>\n<p>The P242A code refers to an issue with the Exhaust Gas Temperature (EGT) Sensor Circuit. This code is triggered when the vehicle&#8217;s Powertrain Control Module (PCM) detects an implausible signal from the EGT sensor, which measures the temperature of exhaust gases entering and exiting the Selective Catalytic Reduction (SCR) system.<\/p>\n<h2>What Causes the P242A Code?<\/h2>\n<p>Several factors can lead to the P242A code being stored, 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 related to the EGT sensor<\/li>\n<\/ul>\n<h2>What Are the Symptoms of the P242A Code?<\/h2>\n<p>Common symptoms associated with the P242A code may include:<\/p>\n<ul>\n<li>Illuminated check engine light<\/li>\n<li>Decreased engine performance<\/li>\n<li>Increased emissions<\/li>\n<\/ul>\n<h2>How Serious Is the P242A Code?<\/h2>\n<p>The severity of the P242A code is considered moderate. While it may not pose an immediate threat to the vehicle&#8217;s safety or functionality, it is crucial to diagnose and address the issue within a reasonable timeframe to prevent further complications and ensure the vehicle runs optimally.<\/p>\n<h2>How to Diagnose the P242A Code<\/h2>\n<p>To properly diagnose the P242A code, a technician will typically:<\/p>\n<ol>\n<li>Use an OBD-II scanner to confirm the P242A code and check for any additional codes.<\/li>\n<li>Inspect the EGT sensor and its wiring for any visible damage or disconnections.<\/li>\n<li>Test the EGT sensor\u2019s functionality using a multimeter.<\/li>\n<li>Check the PCM for proper operation and updates.<\/li>\n<\/ol>\n<h2>Common Repairs for the P242A Code<\/h2>\n<p>Repairs for the P242A code may include:<\/p>\n<ul>\n<li>Replacing the Exhaust Gas Temperature (EGT) 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 P242A Code?<\/h2>\n<p>The cost to fix the P242A code can vary widely depending on the specific repairs needed. On average, repair costs can range from $100 to $800, depending on parts and labor involved.<\/p>\n<h2>Can I Fix the P242A Code Myself?<\/h2>\n<p>While some experienced DIYers may be able to address basic wiring issues or replace the EGT sensor, it is recommended to have a professional technician diagnose and repair the P242A code. This ensures that the repair is done correctly and that any underlying issues are properly addressed.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What Does the P242A Code Mean? The P242A code refers to an issue with the Exhaust Gas Temperature (EGT) Sensor Circuit. This code is triggered when the vehicle&#8217;s Powertrain Control Module (PCM) detects an implausible signal from the EGT sensor, which measures the temperature of exhaust gases entering and exiting the Selective Catalytic Reduction (SCR) &hellip;<\/p>\n","protected":false},"author":26,"featured_media":87961,"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-79745","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 P242A \u2013 Causes, Symptoms, and Repairs<\/title>\n<meta name=\"description\" content=\"Learn all about the P242A code, what causes exhaust gas temperature sensor circuit 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\/p242a-obd2-exhaust-gas-temperature-sensor-circuit\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P242A OBD2: Exhaust Gas Temperature Sensor Circuit\" \/>\n<meta property=\"og:description\" content=\"What Does the P242A Code Mean? The P242A code refers to an issue with the Exhaust Gas Temperature (EGT) Sensor Circuit. This code is triggered when the\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.emanualonline.com\/blog\/p242a-obd2-exhaust-gas-temperature-sensor-circuit\" \/>\n<meta property=\"og:site_name\" content=\"eManualOnline Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/EmanualOnline\/\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/jee514\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-04T20:02:40+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-06-04T20:07:02+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p242a-obd2-exhaust-gas-temperature-sensor-circuit.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"675\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"JC Landry\" \/>\n<meta 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The P242A code refers to an issue with the Exhaust Gas Temperature (EGT) Sensor Circuit. This code is triggered when the vehicle&#8217;s Powertrain Control Module (PCM) detects an implausible signal from the EGT sensor, which measures the temperature of exhaust gases entering and exiting the Selective Catalytic Reduction (SCR)&hellip;","_links":{"self":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/79745","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=79745"}],"version-history":[{"count":3,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/79745\/revisions"}],"predecessor-version":[{"id":87965,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/79745\/revisions\/87965"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media\/87961"}],"wp:attachment":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media?parent=79745"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/categories?post=79745"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/tags?post=79745"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}