{"id":71078,"date":"2022-08-09T22:48:27","date_gmt":"2022-08-10T05:48:27","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=71078"},"modified":"2023-09-04T18:43:29","modified_gmt":"2023-09-05T01:43:29","slug":"p2401-code-evaporative-emission-system-leak-detection-pump-control-circuit-low","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p2401-code-evaporative-emission-system-leak-detection-pump-control-circuit-low\/","title":{"rendered":"P2401 Code: Evaporative Emission System Leak Detection Pump Control Circuit Low"},"content":{"rendered":"<!DOCTYPE html PUBLIC \"-\/\/W3C\/\/DTD HTML 4.0 Transitional\/\/EN\" \"http:\/\/www.w3.org\/TR\/REC-html40\/loose.dtd\">\n<html><body><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 3<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column_1c622f-3f > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_1c622f-3f > .kt-inside-inner-col,.kadence-column_1c622f-3f > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column_1c622f-3f > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_1c622f-3f > .kt-inside-inner-col{flex-direction:column;}.kadence-column_1c622f-3f > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_1c622f-3f > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_1c622f-3f{position:relative;}@media all and (max-width: 1024px){.kadence-column_1c622f-3f > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_1c622f-3f > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_1c622f-3f qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-ba5c83  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-630e1f\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_bdf2e7-9a, .wp-block-kadence-advancedheading.kt-adv-heading_bdf2e7-9a[data-kb-block=\"kb-adv-heading_bdf2e7-9a\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_bdf2e7-9a mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_bdf2e7-9a[data-kb-block=\"kb-adv-heading_bdf2e7-9a\"] mark.kt-highlight{font-family:Inter;font-weight:500;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading_bdf2e7-9a img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_bdf2e7-9a[data-kb-block=\"kb-adv-heading_bdf2e7-9a\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_bdf2e7-9a summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_bdf2e7-9a\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>The P2401 code stands for &ldquo;Evaporative Emission System Leak Detection Pump Control Circuit Low.&rdquo; It&rsquo;s set when the PCM detects the leak detection pump isn&rsquo;t activating when requested.<\/li><li>&nbsp;A failing leak detection pump, leaking vapor lines, and faulty wiring are some of the issues that could trigger the code.<\/li><li>Some symptoms to look out for include an illuminated check engine light, fuel smell, and if you fail an emissions test.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Are you worried about your vehicle&rsquo;s emissions? Check the onboard diagnostic (OBD) system of your vehicle with a scan tool for any stored <a href=\"https:\/\/www.carparts.com\/blog\/search-obd2-codes-list\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"trouble codes\">trouble codes<\/a>. If your vehicle has triggered the P2401 OBD-II code, then there&rsquo;s a chance its evaporative emissions system is faulty. Learn about its definition, common causes, and common symptoms in this article.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">What Does the P2401 Code Mean?<\/h1>\n\n\n\n<p>Diagnostic trouble code (DTC) P2401 code is defined as Evaporative Emission System Leak Detection Pump Control Circuit Low. The powertrain control module (PCM) triggers the P2401 code when it detects the leak detection pump isn&rsquo;t activating when requested. The leak detection pump is responsible for creating a vacuum in the evaporative emissions (EVAP) system to check for potential leaks. The leak detection pump is part of the EVAP system, which is responsible for preventing fuel vapors from escaping into the atmosphere.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/fuel-vapor-lines-1024x683.jpg\" alt=\"fuel vapor lines\" class=\"wp-image-71104\" width=\"1024\" height=\"683\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/fuel-vapor-lines-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/fuel-vapor-lines-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/fuel-vapor-lines-768x513.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/fuel-vapor-lines-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/fuel-vapor-lines-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/fuel-vapor-lines.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>Leaking vapor lines can trigger the code P2401.<\/figcaption><\/figure>\n\n\n\n<p><em><strong>Note:<\/strong> The definition of the P2401 code can be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.<\/em><\/p>\n\n\n\n<h1 class=\"wp-block-heading\">What are the Common Causes of the P2401 Code?<\/h1>\n\n\n\n<p>The P2401 code is typically caused by an issue with the EVAP system. It can also be caused by the following:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Failed <a href=\"https:\/\/www.carparts.com\/evaporative-emissions-system-leak-detection-pump\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"leak detection pump\">leak detection pump<\/a><\/li><li>Leaking vapor lines<\/li><li>Faulty <a href=\"https:\/\/www.carparts.com\/blog\/car-wiring\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"wiring\">wiring<\/a><\/li><li>Faulty PCM<\/li><\/ul>\n\n\n\n<div id=\"article-search-widget\">\n<div class=\"cp-search\">\n<div align=\"center\">\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/w_auto,dpr_auto\/carparts\/logos\/badge_wordmark\/full_color\/CP_LOGO_COLOUR_RGB\" alt=\"CarParts.com\" width=\"300\" height=\"56\">\n<\/div>\n<form id=\"cpsearchform\" name=\"cpsearchform\" action=\"https:\/\/www.carparts.com\/search\" method=\"get\" target=\"_blank\" accept-charset=\"character_set\" aria-label=\"search CarParts.com\">\n    <input type=\"text\" class=\"keyword\" name=\"q\" placeholder=\"Search for parts on CarParts.com\" value=\"\" aria-label=\"Search CarParts.com\"><input type=\"submit\" class=\"btn-search\" value=\"Search\" aria-label=\"Search\">\n<\/form>\n<\/div>\n<\/div>\n\n\n\n<h1 class=\"wp-block-heading\">What are the Common Symptoms of the P2401 Code?<\/h1>\n\n\n\n<p>The P2401 code hardly shows any symptoms. You&rsquo;ll only most likely see an <a href=\"https:\/\/www.carparts.com\/blog\/check-engine-light-flashing\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"illuminated check engine light\">illuminated check engine light<\/a> or smell fuel. Your vehicle might also <a href=\"https:\/\/www.carparts.com\/blog\/how-to-pass-an-emissions-test\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"fail an emissions test\">fail an emissions test<\/a>.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">How to Diagnose the P2401 Code<\/h1>\n\n\n\n<p>While the definition of the P2401 code implies that the fault is with the leak detection pump, this is not always the case. To resolve this diagnostic trouble code, you must first identify the root cause. This may require a visual examination of the concerned components. This task could also require the use of specialized equipment and knowledge. If you&rsquo;re new to DIY repairs, we recommend that you seek the assistance of a professional mechanic.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/car-emissions-test-1024x683.jpg\" alt=\"car emissions test\" class=\"wp-image-71101\" width=\"1024\" height=\"683\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/car-emissions-test-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/car-emissions-test-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/car-emissions-test-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/car-emissions-test-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/car-emissions-test-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/car-emissions-test.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>Your vehicle might fail an emissions test if it has P2401 code logged.<\/figcaption><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\">How to Fix the P2401 Code<\/h1>\n\n\n\n<p>OBD-II codes can be caused by a variety of problems, so there is no single way to fix them. You must first obtain an accurate diagnosis in order to determine the best course of action.<\/p>\n\n\n\n<p>Once you&rsquo;ve determined the cause of the P2401 code, you can look for solutions from credible internet repair resources and how-to guides. When troubleshooting and repairing diagnostic codes, always <a href=\"https:\/\/www.carparts.com\/blog\/why-you-should-always-consult-a-repair-manual\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"refer to your vehicle&rsquo;s repair manual\">refer to your vehicle&rsquo;s repair manual<\/a>.<\/p>\n\n\n\n<p>Chilton repair manuals are also beneficial. ALLDATA subscriptions, on the other hand, are even better because they include precise factory repair information for drivers who want to conduct their own repairs.<\/p>\n\n\n\n<p>If you don&rsquo;t have much expertise in diagnosing or repairing issue codes, it&rsquo;s best to see a professional mechanic.<\/p>\n<\/body><\/html>\n","protected":false},"excerpt":{"rendered":"<p><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 3<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>Are you worried about your vehicle&rsquo;s emissions? Check the onboard diagnostic (OBD) system of your vehicle with a scan tool&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p2401-code-evaporative-emission-system-leak-detection-pump-control-circuit-low\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":71098,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[1314],"tags":[3508],"ppma_author":[2607,2855],"class_list":{"0":"post-71078","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-evaporative-emissions-system-leak-detection-pump","9":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P2401 Code: Evaporative Emission System Leak Detection Pump Control Circuit Low - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Learn what a P2401 code means, its possible causes, and the common symptoms associated with it. Read on for more info.\" \/>\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.carparts.com\/blog\/p2401-code-evaporative-emission-system-leak-detection-pump-control-circuit-low\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P2401 Code: Evaporative Emission System Leak Detection Pump Control Circuit Low - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Learn what a P2401 code means, its possible causes, and the common symptoms associated with it. 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