{"id":79385,"date":"2025-06-18T13:00:57","date_gmt":"2025-06-18T18:00:57","guid":{"rendered":"https:\/\/www.emanualonline.com\/blog\/?p=79385"},"modified":"2025-06-18T13:13:52","modified_gmt":"2025-06-18T18:13:52","slug":"p20da-obd2-exhaust-aftertreatment-fuel-supply-control-circuit-high","status":"publish","type":"post","link":"https:\/\/www.emanualonline.com\/blog\/p20da-obd2-exhaust-aftertreatment-fuel-supply-control-circuit-high","title":{"rendered":"P20DA OBD2: Exhaust Aftertreatment Fuel Supply Control Circuit High"},"content":{"rendered":"<h2><strong>What Does the P20DA Code Mean?<\/strong><\/h2>\n<p>The P20DA code indicates an issue with the Exhaust Aftertreatment Fuel Supply Control Circuit, specifically reporting that the circuit is experiencing a high signal. This generally points to problems related to the Diesel Exhaust Fluid (DEF) system, which is crucial for reducing emissions in diesel engines.<\/p>\n<h2>What Causes the P20DA Code?<\/h2>\n<p>This code is often triggered by issues with the DEF system. The most common causes include:<\/p>\n<ul>\n<li>DEF pump failure<\/li>\n<li>Powertrain Control Module (PCM) failure<\/li>\n<li>Wiring issues related to the DEF system<\/li>\n<\/ul>\n<h2>What Are the Symptoms of the P20DA Code?<\/h2>\n<p>When the P20DA code is present, you may notice several symptoms, including:<\/p>\n<ul>\n<li>DPF (Diesel Particulate Filter) regeneration may not occur<\/li>\n<li>Check Engine Light illuminated<\/li>\n<li>Decreased engine performance<\/li>\n<\/ul>\n<h2>How Serious Is the P20DA Code?<\/h2>\n<p>The P20DA code is classified as moderate severity. While it may not pose an immediate threat to the vehicle&#8217;s safety, it is crucial to address it promptly to prevent further complications and ensure the proper function of the exhaust system.<\/p>\n<h2>How to Diagnose the P20DA Code<\/h2>\n<p>A proper diagnosis of the P20DA code involves several steps:<\/p>\n<ul>\n<li>Use an OBD-II scanner to confirm the P20DA code and check for any related codes.<\/li>\n<li>Inspect the DEF pump and wiring for any visible damage or faults.<\/li>\n<li>Test the DEF pump operation to ensure it is functioning correctly.<\/li>\n<li>Check the Powertrain Control Module (PCM) for any faults.<\/li>\n<\/ul>\n<h2>Common Repairs for the P20DA Code<\/h2>\n<p>Repairs for the P20DA code may include:<\/p>\n<ul>\n<li>Replacing a faulty DEF pump<\/li>\n<li>Repairing or replacing damaged wiring<\/li>\n<li>Reprogramming or replacing the PCM if necessary<\/li>\n<\/ul>\n<h2>How Much Does It Cost to Fix the P20DA Code?<\/h2>\n<p>The cost to repair the P20DA code can vary widely depending on the specific issue. Typical repairs may range from $100 to $1,500, depending on whether you need to replace the DEF pump, repair wiring, or address PCM issues.<\/p>\n<h2>Can I Fix the P20DA Code Myself?<\/h2>\n<p>While some owners may be able to diagnose simple wiring issues or replace the DEF pump themselves, it is often recommended to consult a professional mechanic. The DEF system is complex, and improper repairs can lead to further problems.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What Does the P20DA Code Mean? The P20DA code indicates an issue with the Exhaust Aftertreatment Fuel Supply Control Circuit, specifically reporting that the circuit is experiencing a high signal. This generally points to problems related to the Diesel Exhaust Fluid (DEF) system, which is crucial for reducing emissions in diesel engines. What Causes the &hellip;<\/p>\n","protected":false},"author":26,"featured_media":88985,"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-79385","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 P20DA \u2013 Causes, Symptoms, and Repairs<\/title>\n<meta name=\"description\" content=\"Learn all about the P20DA code, what causes exhaust aftertreatment fuel supply 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\/p20da-obd2-exhaust-aftertreatment-fuel-supply-control-circuit-high\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P20DA OBD2: Exhaust Aftertreatment Fuel Supply Control Circuit High\" \/>\n<meta property=\"og:description\" content=\"What Does the P20DA 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\/p20da-obd2-exhaust-aftertreatment-fuel-supply-control-circuit-high.png",1200,675,false],"thumbnail":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p20da-obd2-exhaust-aftertreatment-fuel-supply-control-circuit-high-150x150.png",150,150,true],"medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p20da-obd2-exhaust-aftertreatment-fuel-supply-control-circuit-high-300x169.png",300,169,true],"medium_large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p20da-obd2-exhaust-aftertreatment-fuel-supply-control-circuit-high-768x432.png",618,348,true],"large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p20da-obd2-exhaust-aftertreatment-fuel-supply-control-circuit-high-1024x576.png",618,348,true],"1536x1536":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p20da-obd2-exhaust-aftertreatment-fuel-supply-control-circuit-high.png",1200,675,false],"2048x2048":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p20da-obd2-exhaust-aftertreatment-fuel-supply-control-circuit-high.png",1200,675,false],"tie-small":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p20da-obd2-exhaust-aftertreatment-fuel-supply-control-circuit-high-110x75.png",110,75,true],"tie-medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p20da-obd2-exhaust-aftertreatment-fuel-supply-control-circuit-high-403x215.png",403,215,true],"tie-large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p20da-obd2-exhaust-aftertreatment-fuel-supply-control-circuit-high-310x205.png",310,205,true],"slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p20da-obd2-exhaust-aftertreatment-fuel-supply-control-circuit-high-660x330.png",660,330,true],"big-slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p20da-obd2-exhaust-aftertreatment-fuel-supply-control-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":"What Does the P20DA Code Mean? The P20DA code indicates an issue with the Exhaust Aftertreatment Fuel Supply Control Circuit, specifically reporting that the circuit is experiencing a high signal. This generally points to problems related to the Diesel Exhaust Fluid (DEF) system, which is crucial for reducing emissions in diesel engines. What Causes the&hellip;","_links":{"self":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/79385","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=79385"}],"version-history":[{"count":3,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/79385\/revisions"}],"predecessor-version":[{"id":88989,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/79385\/revisions\/88989"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media\/88985"}],"wp:attachment":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media?parent=79385"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/categories?post=79385"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/tags?post=79385"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}