{"id":79716,"date":"2025-06-05T13:40:51","date_gmt":"2025-06-05T18:40:51","guid":{"rendered":"https:\/\/www.emanualonline.com\/blog\/?p=79716"},"modified":"2025-06-05T13:40:51","modified_gmt":"2025-06-05T18:40:51","slug":"p2404-obd2-evaporative-emission-system-leak-detection-pump-sense-circuit","status":"publish","type":"post","link":"https:\/\/www.emanualonline.com\/blog\/p2404-obd2-evaporative-emission-system-leak-detection-pump-sense-circuit","title":{"rendered":"P2404 OBD2: Evaporative Emission System Leak Detection Pump Sense Circuit"},"content":{"rendered":"<p>The P2404 OBD-II code indicates an issue with the Evaporative Emission System (EVAP) leak detection pump sense circuit. This code is triggered when the vehicle&#8217;s computer detects a malfunction in the pressure\/vacuum monitoring system of the EVAP system, which plays a critical role in reducing harmful emissions.<\/p>\n<h2>What Does the P2404 Code Mean?<\/h2>\n<p>OBD-II Code P2404 is defined as a problem within the Evaporative Emission System Leak Detection Pump Sense Circuit. The EVAP system&#8217;s purpose is to capture and vent fuel vapors from the fuel tank to the intake manifold for combustion, thus preventing these vapors from escaping into the atmosphere.<\/p>\n<h2>What Causes the P2404 Code?<\/h2>\n<p>Several factors can trigger the P2404 code, including:<\/p>\n<ul>\n<li>Evap leak detection pump failure<\/li>\n<li>Leak in the EVAP system<\/li>\n<li>Powertrain Control Module (PCM) failure<\/li>\n<li>Restriction in the EVAP system<\/li>\n<li>Wiring issues<\/li>\n<\/ul>\n<h2>What Are the Symptoms of the P2404 Code?<\/h2>\n<p>While some vehicles may not exhibit noticeable symptoms, others may display certain indications, including:<\/p>\n<ul>\n<li>Illuminated check engine light<\/li>\n<li>Decreased fuel efficiency<\/li>\n<li>Failed emissions test<\/li>\n<\/ul>\n<h2>How Serious Is the P2404 Code?<\/h2>\n<p>The P2404 code is classified as a moderate severity issue. Although it may not pose an immediate threat to your vehicle&#8217;s safety or functionality, it is advisable to address it promptly to prevent further complications and ensure optimal vehicle performance.<\/p>\n<h2>How to Diagnose the P2404 Code<\/h2>\n<p>To properly diagnose the P2404 code, a qualified technician will typically perform the following steps:<\/p>\n<ol>\n<li>Use an OBD-II scanner to confirm the P2404 code and check for any additional codes.<\/li>\n<li>Inspect the EVAP system for any visible leaks or damage.<\/li>\n<li>Test the leak detection pump for proper operation.<\/li>\n<li>Examine the wiring and connections for any signs of wear or corrosion.<\/li>\n<li>Check the Powertrain Control Module (PCM) for any faults.<\/li>\n<\/ol>\n<h2>Common Repairs for the P2404 Code<\/h2>\n<p>Common repairs for the P2404 code may include:<\/p>\n<ul>\n<li>Replacing the evap leak detection pump<\/li>\n<li>Repairing or replacing damaged hoses or connections in the EVAP system<\/li>\n<li>Addressing any wiring issues or shorts<\/li>\n<li>Reprogramming or replacing the PCM if necessary<\/li>\n<\/ul>\n<h2>How Much Does It Cost to Fix the P2404 Code?<\/h2>\n<p>The cost to repair the P2404 code can vary significantly based on the extent of the damage and the labor rates in your area. Typically, repairs can range from $100 to $500, depending on whether parts need to be replaced or if a more extensive diagnostic procedure is required.<\/p>\n<h2>Can I Fix the P2404 Code Myself?<\/h2>\n<p>While some DIY enthusiasts may attempt to fix the P2404 code themselves, it is recommended to seek assistance from a qualified mechanic. Proper diagnosis requires specialized tools and knowledge of the EVAP system, and making incorrect repairs may lead to further issues.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The P2404 OBD-II code indicates an issue with the Evaporative Emission System (EVAP) leak detection pump sense circuit. This code is triggered when the vehicle&#8217;s computer detects a malfunction in the pressure\/vacuum monitoring system of the EVAP system, which plays a critical role in reducing harmful emissions. What Does the P2404 Code Mean? OBD-II Code &hellip;<\/p>\n","protected":false},"author":26,"featured_media":88053,"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-79716","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 P2404 \u2013 Causes, Symptoms, and Repairs<\/title>\n<meta name=\"description\" content=\"Learn all about the P2404 code, what causes evaporative emission system leak detection pump sense 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\/p2404-obd2-evaporative-emission-system-leak-detection-pump-sense-circuit\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P2404 OBD2: Evaporative Emission System Leak Detection Pump Sense Circuit\" \/>\n<meta property=\"og:description\" content=\"The P2404 OBD-II code indicates an issue with the Evaporative Emission System (EVAP) leak detection pump sense circuit. 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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\/p2404-obd2-evaporative-emission-system-leak-detection-pump-sense-circuit.png",1200,675,false],"thumbnail":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p2404-obd2-evaporative-emission-system-leak-detection-pump-sense-circuit-150x150.png",150,150,true],"medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p2404-obd2-evaporative-emission-system-leak-detection-pump-sense-circuit-300x169.png",300,169,true],"medium_large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p2404-obd2-evaporative-emission-system-leak-detection-pump-sense-circuit-768x432.png",618,348,true],"large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p2404-obd2-evaporative-emission-system-leak-detection-pump-sense-circuit-1024x576.png",618,348,true],"1536x1536":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p2404-obd2-evaporative-emission-system-leak-detection-pump-sense-circuit.png",1200,675,false],"2048x2048":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p2404-obd2-evaporative-emission-system-leak-detection-pump-sense-circuit.png",1200,675,false],"tie-small":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p2404-obd2-evaporative-emission-system-leak-detection-pump-sense-circuit-110x75.png",110,75,true],"tie-medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p2404-obd2-evaporative-emission-system-leak-detection-pump-sense-circuit-403x215.png",403,215,true],"tie-large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p2404-obd2-evaporative-emission-system-leak-detection-pump-sense-circuit-310x205.png",310,205,true],"slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p2404-obd2-evaporative-emission-system-leak-detection-pump-sense-circuit-660x330.png",660,330,true],"big-slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p2404-obd2-evaporative-emission-system-leak-detection-pump-sense-circuit-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 P2404 OBD-II code indicates an issue with the Evaporative Emission System (EVAP) leak detection pump sense circuit. This code is triggered when the vehicle&#8217;s computer detects a malfunction in the pressure\/vacuum monitoring system of the EVAP system, which plays a critical role in reducing harmful emissions. What Does the P2404 Code Mean? OBD-II Code&hellip;","_links":{"self":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/79716","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=79716"}],"version-history":[{"count":1,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/79716\/revisions"}],"predecessor-version":[{"id":86415,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/79716\/revisions\/86415"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media\/88053"}],"wp:attachment":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media?parent=79716"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/categories?post=79716"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/tags?post=79716"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}