{"id":74140,"date":"2022-10-09T23:19:06","date_gmt":"2022-10-10T06:19:06","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=74140"},"modified":"2024-08-16T05:48:55","modified_gmt":"2024-08-16T12:48:55","slug":"p043e-code-evaporative-emission-system-leak-detection-reference-orifice-low-flow","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p043e-code-evaporative-emission-system-leak-detection-reference-orifice-low-flow\/","title":{"rendered":"P043e Code: Evaporative Emission System Leak Detection Reference Orifice Low Flow"},"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-column74140_da7de7-77 > .kt-inside-inner-col,.kadence-column74140_da7de7-77 > .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-column74140_da7de7-77 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column74140_da7de7-77 > .kt-inside-inner-col{flex-direction:column;}.kadence-column74140_da7de7-77 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column74140_da7de7-77 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column74140_da7de7-77{position:relative;}@media all and (max-width: 1024px){.kadence-column74140_da7de7-77 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column74140_da7de7-77 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column74140_da7de7-77 inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-cee072  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-c6f644\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading74140_ff1a0a-17, .wp-block-kadence-advancedheading.kt-adv-heading74140_ff1a0a-17[data-kb-block=\"kb-adv-heading74140_ff1a0a-17\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading74140_ff1a0a-17 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading74140_ff1a0a-17[data-kb-block=\"kb-adv-heading74140_ff1a0a-17\"] 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-heading74140_ff1a0a-17 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading74140_ff1a0a-17[data-kb-block=\"kb-adv-heading74140_ff1a0a-17\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading74140_ff1a0a-17 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading74140_ff1a0a-17\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The diagnostic trouble code (DTC) P043e stands for &ldquo;Evaporative Emission System Leak Detection Reference Orifice Low Flow.&rdquo;&nbsp;<\/li>\n\n\n\n<li>The powertrain control module (PCM) will trigger this code when debris clogs up the reference orifice tube in the evaporative emission (EVAP) system.<\/li>\n\n\n\n<li>Common causes of the P043e code are damaged or clogged leak detection orifice inside the detection pump, circuit issues, and a PCM problem.<\/li>\n\n\n\n<li>A vehicle that sets a P043e code can show symptoms like an illuminated check engine light and slightly diminished fuel efficiency.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Many modern vehicles are equipped with an evaporative emission system (EVAP). The function of this system is to trap and purge smog-forming fuel vapors to prevent them from polluting the atmosphere.<\/p>\n\n\n\n<p>The <a href=\"https:\/\/www.carparts.com\/engine-control-module\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"powertrain control module\">powertrain control module<\/a> (PCM) is usually altered once there&rsquo;s a fault or leak within this system. P043e is one of the trouble codes related to the EVAP system.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P043e Code Mean?<\/h2>\n\n\n\n<p><a href=\"https:\/\/www.carparts.com\/blog\/search-obd2-codes-list\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Diagnostic trouble code\">Diagnostic trouble code<\/a> (DTC) P043e stands for &ldquo;Evaporative Emission System Leak Detection Reference Orifice Low Flow.&rdquo;<\/p>\n\n\n\n<p>The <a href=\"https:\/\/www.carparts.com\/blog\/evaporative-emission-control-evap-system-101-the-basics\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"EVAP system\">EVAP system<\/a> uses a vapor canister to trap excessive fuel vapors until the engine is in a suitable condition to burn them. The <a href=\"https:\/\/www.carparts.com\/vapor-canister\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"vapor canister\">vapor canister<\/a> is the EVAP system&rsquo;s focal point.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/vapor-canister-replacements-for-car-1024x683.jpg\" alt=\"vapor canister replacements for car\" class=\"wp-image-74231\" style=\"width:1024px;height:683px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/vapor-canister-replacements-for-car-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/vapor-canister-replacements-for-car-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/vapor-canister-replacements-for-car-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/vapor-canister-replacements-for-car-1536x1025.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/vapor-canister-replacements-for-car-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/vapor-canister-replacements-for-car-1200x800.jpg 1200w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/vapor-canister-replacements-for-car-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/vapor-canister-replacements-for-car.jpg 2000w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">The canister keeps the fuel vapors from the gas tank when the engine is turned off.<\/figcaption><\/figure>\n\n\n\n<p>The canister keeps the fuel vapors from the <a href=\"https:\/\/www.carparts.com\/fuel-tank\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"gas tank\">gas tank<\/a> when the engine is turned off. The canister contains activated charcoal, which traps the vapors until the engine starts and the conditions for a vapor purge are met.<\/p>\n\n\n\n<p>Some EVAP systems use an electronic leak detection pump to generate pressure within the system so that leaks\/flow can be tested.<\/p>\n\n\n\n<p>The leak detection pump usually has a reference orifice tube. This tube inhibits airflow to create a pressure difference in the EVAP system. The PCM will set code P043e if the orifice tube becomes clogged with debris.<\/p>\n\n\n\n<p><strong><em>Note:<\/em><\/strong><em> The definition of code P043e might 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<h2 class=\"wp-block-heading\">What are the Common Causes of the P043e Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Damaged or clogged leak detection orifice inside the detection pump<\/li>\n\n\n\n<li>Circuit issues, such as damaged wires or poor connections<\/li>\n\n\n\n<li>An issue with the ECM, such as software in need of an update<\/li>\n<\/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<h2 class=\"wp-block-heading\">What are the Common Symptoms of the P043e Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><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><\/li>\n\n\n\n<li>Slightly diminished fuel efficiency<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P043e Code<\/h2>\n\n\n\n<p>DTC P043e can be logged in various vehicles. However, this doesn&rsquo;t mean that there&rsquo;s a universal solution that&rsquo;ll work for all makes and models.<\/p>\n\n\n\n<p>&nbsp;If you&rsquo;re not that well-versed with auto repair, it might be best to call your mechanic to help you out.&nbsp; However, if you&rsquo;re confident with your knowledge in auto repair, then you can go ahead and do it yourself.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Fix the P043e Code<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/mechanic-with-obd-tool-running-tests-on-car-1024x683.jpg\" alt=\"mechanic with obd tool running tests on car\" class=\"wp-image-74233\" style=\"width:1024px;height:683px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/mechanic-with-obd-tool-running-tests-on-car-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/mechanic-with-obd-tool-running-tests-on-car-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/mechanic-with-obd-tool-running-tests-on-car-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/mechanic-with-obd-tool-running-tests-on-car-1536x1025.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/mechanic-with-obd-tool-running-tests-on-car-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/mechanic-with-obd-tool-running-tests-on-car-1200x800.jpg 1200w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/mechanic-with-obd-tool-running-tests-on-car-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/mechanic-with-obd-tool-running-tests-on-car.jpg 2000w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">Fixing any trouble code can be hard if you&rsquo;re not a certified mechanic.<\/figcaption><\/figure>\n\n\n\n<p>Fixing any trouble code can be hard if you&rsquo;re not a certified mechanic. So it&rsquo;s usually best to take your vehicle to the nearest auto repair shop if you don&rsquo;t have the repair skills to get it done.<\/p>\n\n\n\n<p>But if you&rsquo;re equipped with the right tools and auto repair know-how, you can go ahead and address the problem on your own. However, keep in mind that vehicles can be structured differently per manufacturer. For example, repair steps for a P043e in a Toyota might not work for other vehicles.<\/p>\n\n\n\n<p>So make sure to read up on repair steps that are specific to your make and model. Checking out guides from Chilton or getting an ALLDATA subscription helps.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Get an Orifice Tube Service Kit Without Leaving Your Home<\/h2>\n\n\n\n<p>If there&rsquo;s a clog in the reference orifice tube, the PCM may set P043e code. A clog is likely also what&rsquo;s causing your engine to use up more fuel than usual. Servicing the damaged orifice tube with an orifice tube service kit should help resolve the fuel issue and save you some money in the process. You can purchase a kit at CarParts.com.<\/p>\n\n\n\n<p>Our goal at CarParts.com is to make ordering online quick and easy. You can browse our catalog from the comforts of home and order what you need conveniently. It only takes a few quick clicks to add things to your cart. After that, you can enjoy the convenience of our secure checkout. We&rsquo;ll ship any new parts you order straight to your door in as fast as two business days.<\/p>\n\n\n\n<p>Resolve the P043e code in your vehicle and bring your vehicle&rsquo;s fuel efficiency back to what it once was. Order an <a href=\"https:\/\/www.carparts.com\/orifice-tube-service-kit\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"orifice tube service kit\">orifice tube service kit<\/a> now at CarParts.com.<\/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>Many modern vehicles are equipped with an evaporative emission system (EVAP). The function of this system is to trap and&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p043e-code-evaporative-emission-system-leak-detection-reference-orifice-low-flow\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":74227,"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":[1323,1198,1663],"ppma_author":[2607,2855],"class_list":{"0":"post-74140","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-engine-control-module-2","9":"tag-fuel-tank-2","10":"tag-vapor-canister","11":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P043e Code: Evaporative Emission System Leak Detection Reference Orifice Low Flow - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Learn what a P043e code means, its possible causes, and the common symptoms associated with it in this article.\" \/>\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\/p043e-code-evaporative-emission-system-leak-detection-reference-orifice-low-flow\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P043e Code: Evaporative Emission System Leak Detection Reference Orifice Low Flow - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Learn what a P043e code means, its possible causes, and the common symptoms associated with it in this article.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/p043e-code-evaporative-emission-system-leak-detection-reference-orifice-low-flow\/\" \/>\n<meta property=\"og:site_name\" content=\"In The Garage with CarParts.com\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/carpartscom\" \/>\n<meta property=\"article:published_time\" content=\"2022-10-10T06:19:06+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-08-16T12:48:55+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/vapor-canister-of-car-evap-system.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2000\" \/>\n\t<meta property=\"og:image:height\" content=\"1334\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:site\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p043e-code-evaporative-emission-system-leak-detection-reference-orifice-low-flow\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p043e-code-evaporative-emission-system-leak-detection-reference-orifice-low-flow\\\/\"},\"author\":[{\"@type\":\"Person\",\"$id\":\"4\",\"name\":\"CarParts.com Research Team\",\"jobTitle\":\"Expert Automotive Writer\",\"description\":\"The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. 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