{"id":80126,"date":"2025-05-24T15:45:34","date_gmt":"2025-05-24T20:45:34","guid":{"rendered":"https:\/\/www.emanualonline.com\/blog\/?p=80126"},"modified":"2025-06-04T05:12:07","modified_gmt":"2025-06-04T10:12:07","slug":"p26a2-obd2-exhaust-aftertreatment-glow-plug-circuit-high","status":"publish","type":"post","link":"https:\/\/www.emanualonline.com\/blog\/p26a2-obd2-exhaust-aftertreatment-glow-plug-circuit-high","title":{"rendered":"P26A2 OBD2: Exhaust Aftertreatment Glow Plug Circuit High"},"content":{"rendered":"<p>The P26A2 OBD-II code is a diagnostic trouble code (DTC) that indicates a problem with the exhaust aftertreatment glow plug circuit. This issue is commonly associated with diesel engines and can affect the vehicle&#8217;s emissions system.<\/p>\n<h2>What Does the P26A2 Code Mean?<\/h2>\n<p>The P26A2 code signifies that the glow plug circuit for the exhaust aftertreatment system is showing a high voltage condition. This can indicate that the glow plug is malfunctioning or that there is a problem within the circuit itself.<\/p>\n<h2>What Causes the P26A2 Code?<\/h2>\n<p>Several factors can trigger the P26A2 code, including:<\/p>\n<ul>\n<li>Glow plug control module failure<\/li>\n<li>Glow plug relay failure<\/li>\n<li>Powertrain Control Module (PCM) failure<\/li>\n<li>Wiring issues related to the glow plug circuit<\/li>\n<\/ul>\n<h2>What Are the Symptoms of the P26A2 Code?<\/h2>\n<p>The common symptoms associated with the P26A2 code include:<\/p>\n<ul>\n<li>Decreased engine performance<\/li>\n<li>Failure of DPF (Diesel Particulate Filter) regeneration<\/li>\n<li>Possible warning lights on the dashboard<\/li>\n<\/ul>\n<h2>How Serious Is the P26A2 Code?<\/h2>\n<p>The P26A2 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 important to have it diagnosed and repaired in a timely manner to prevent more serious problems from developing.<\/p>\n<h2>How to Diagnose the P26A2 Code<\/h2>\n<p>To properly diagnose the P26A2 code, a mechanic will typically follow these steps:<\/p>\n<ol>\n<li>Use an OBD-II scanner to confirm the code and check for any additional codes.<\/li>\n<li>Inspect the glow plug circuit, including wiring and connectors, for damage or corrosion.<\/li>\n<li>Test the glow plug control module and relay for proper operation.<\/li>\n<li>Check the Powertrain Control Module (PCM) for faults.<\/li>\n<\/ol>\n<h2>Common Repairs for the P26A2 Code<\/h2>\n<p>Common repairs for the P26A2 code may include:<\/p>\n<ul>\n<li>Replacing the glow plug if it is found to be defective.<\/li>\n<li>Repairing or replacing damaged wiring or connectors in the glow plug circuit.<\/li>\n<li>Replacing the glow plug control module or relay if they are faulty.<\/li>\n<li>Updating or reprogramming the PCM if necessary.<\/li>\n<\/ul>\n<h2>How Much Does It Cost to Fix the P26A2 Code?<\/h2>\n<p>The cost to fix the P26A2 code can vary widely based on the specific issue. On average, repairs can range from $100 to $800, depending on whether parts need to be replaced or if wiring repairs are necessary.<\/p>\n<h2>Can I Fix the P26A2 Code Myself?<\/h2>\n<p>While some car enthusiasts may be able to troubleshoot and repair issues related to the P26A2 code, it is generally recommended to have a professional mechanic diagnose and repair the problem. This is due to the complexity of the exhaust aftertreatment system and the potential for further issues if not addressed correctly.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The P26A2 OBD-II code is a diagnostic trouble code (DTC) that indicates a problem with the exhaust aftertreatment glow plug circuit. This issue is commonly associated with diesel engines and can affect the vehicle&#8217;s emissions system. What Does the P26A2 Code Mean? The P26A2 code signifies that the glow plug circuit for the exhaust aftertreatment &hellip;<\/p>\n","protected":false},"author":26,"featured_media":82232,"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-80126","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 P26A2 \u2013 Causes, Symptoms, and Repairs<\/title>\n<meta name=\"description\" content=\"Learn all about the P26A2 code, what causes exhaust aftertreatment glow plug circuit high, and how to diagnose and fix common issues 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\/p26a2-obd2-exhaust-aftertreatment-glow-plug-circuit-high\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P26A2 OBD2: Exhaust Aftertreatment Glow Plug Circuit High\" \/>\n<meta property=\"og:description\" content=\"The P26A2 OBD-II code is a diagnostic trouble code (DTC) that indicates a problem with the exhaust aftertreatment glow plug circuit. This issue is\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.emanualonline.com\/blog\/p26a2-obd2-exhaust-aftertreatment-glow-plug-circuit-high\" \/>\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=\"2025-05-24T20:45:34+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-06-04T10:12:07+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p26a2-obd2-exhaust-aftertreatment-glow-plug-circuit-high.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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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\/05\/p26a2-obd2-exhaust-aftertreatment-glow-plug-circuit-high.png",1200,675,false],"thumbnail":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p26a2-obd2-exhaust-aftertreatment-glow-plug-circuit-high-150x150.png",150,150,true],"medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p26a2-obd2-exhaust-aftertreatment-glow-plug-circuit-high-300x169.png",300,169,true],"medium_large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p26a2-obd2-exhaust-aftertreatment-glow-plug-circuit-high-768x432.png",618,348,true],"large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p26a2-obd2-exhaust-aftertreatment-glow-plug-circuit-high-1024x576.png",618,348,true],"1536x1536":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p26a2-obd2-exhaust-aftertreatment-glow-plug-circuit-high.png",1200,675,false],"2048x2048":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p26a2-obd2-exhaust-aftertreatment-glow-plug-circuit-high.png",1200,675,false],"tie-small":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p26a2-obd2-exhaust-aftertreatment-glow-plug-circuit-high-110x75.png",110,75,true],"tie-medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p26a2-obd2-exhaust-aftertreatment-glow-plug-circuit-high-403x215.png",403,215,true],"tie-large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p26a2-obd2-exhaust-aftertreatment-glow-plug-circuit-high-310x205.png",310,205,true],"slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p26a2-obd2-exhaust-aftertreatment-glow-plug-circuit-high-660x330.png",660,330,true],"big-slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p26a2-obd2-exhaust-aftertreatment-glow-plug-circuit-high-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":"The P26A2 OBD-II code is a diagnostic trouble code (DTC) that indicates a problem with the exhaust aftertreatment glow plug circuit. This issue is commonly associated with diesel engines and can affect the vehicle&#8217;s emissions system. What Does the P26A2 Code Mean? The P26A2 code signifies that the glow plug circuit for the exhaust aftertreatment&hellip;","_links":{"self":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/80126","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=80126"}],"version-history":[{"count":1,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/80126\/revisions"}],"predecessor-version":[{"id":82234,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/80126\/revisions\/82234"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media\/82232"}],"wp:attachment":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media?parent=80126"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/categories?post=80126"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/tags?post=80126"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}