{"id":71859,"date":"2022-09-06T02:01:41","date_gmt":"2022-09-06T09:01:41","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=71859"},"modified":"2023-08-09T00:56:29","modified_gmt":"2023-08-09T07:56:29","slug":"u0401-code-invalid-data-received-from-ecm-pcm-a","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/u0401-code-invalid-data-received-from-ecm-pcm-a\/","title":{"rendered":"U0401 Code: Invalid Data Received from ECM \/ PCM \u201cA\u201d"},"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\"> 2<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column_4f82b2-ea > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_4f82b2-ea > .kt-inside-inner-col,.kadence-column_4f82b2-ea > .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_4f82b2-ea > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_4f82b2-ea > .kt-inside-inner-col{flex-direction:column;}.kadence-column_4f82b2-ea > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_4f82b2-ea > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_4f82b2-ea{position:relative;}@media all and (max-width: 1024px){.kadence-column_4f82b2-ea > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_4f82b2-ea > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_4f82b2-ea qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-727b2b  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-edf35e\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_8e5ec8-ff, .wp-block-kadence-advancedheading.kt-adv-heading_8e5ec8-ff[data-kb-block=\"kb-adv-heading_8e5ec8-ff\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_8e5ec8-ff mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_8e5ec8-ff[data-kb-block=\"kb-adv-heading_8e5ec8-ff\"] 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_8e5ec8-ff img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_8e5ec8-ff[data-kb-block=\"kb-adv-heading_8e5ec8-ff\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_8e5ec8-ff summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_8e5ec8-ff\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>The U0401 code stands for &ldquo;Invalid Data Received from ECM\/PCM &lsquo;A&rsquo;&rdquo;, which means modules on the data network are receiving implausible data from the vehicle&rsquo;s powertrain control module.<\/li><li>The common causes of the U0401 code include one or more faulty sensors, a dead battery, and data network issues.<\/li><li>The vehicle refusing to start, an illuminated check engine light, and a disabled traction control system are some common symptoms related to the U0401 code.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Is your <a href=\"https:\/\/www.carparts.com\/blog\/check-engine-light-flashing\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"check engine light on\">check engine light on<\/a>? Using a scan tool can help you identify your vehicle&rsquo;s problem. If the U0401 code has been triggered, this article will inform you about the code&rsquo;s definition, common causes, and common symptoms.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the U0401 Code Mean?<\/h2>\n\n\n\n<p>Diagnostic trouble code U0401 stands for Invalid Data Received from ECM\/PCM &ldquo;A.&rdquo; This code is logged when modules on the data network are receiving implausible data from the ECM\/PCM. Modern vehicles use a data network that allows vehicle control modules to communicate with each other. These control modules expect to receive a specific type of information from related modules.<\/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\/08\/car-engine-control-module-1024x683.jpg\" alt=\"car engine control module\" class=\"wp-image-71873\" width=\"1024\" height=\"683\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/08\/car-engine-control-module-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/08\/car-engine-control-module-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/08\/car-engine-control-module-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/08\/car-engine-control-module-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/08\/car-engine-control-module-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/08\/car-engine-control-module.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>The code U0401 is logged when modules on the data network receive implausible data from the ECM\/PCM.<\/figcaption><\/figure>\n\n\n\n<p><em><strong>Note:<\/strong> The definition of the U0401 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<h2 class=\"wp-block-heading\">What are the Common Causes of the U0401 Code?<\/h2>\n\n\n\n<p>The U0401 code can be triggered by the following problems<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>One or more faulty sensors causing the PCM to send invalid data<\/li><li>A <a href=\"https:\/\/www.carparts.com\/blog\/5-signs-of-a-bad-battery\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"dead battery or charging system problems\">dead battery or charging system problems<\/a><\/li><li>Circuit issues, such as a damaged <a href=\"https:\/\/www.carparts.com\/blog\/car-wiring\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"wire\">wire<\/a> or poor connection<\/li><li>PCM problems<\/li><li>Data network problems<\/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<h2 class=\"wp-block-heading\">What are the Common Symptoms of the U0401 Code?<\/h2>\n\n\n\n<p>The P0401 code can cause your vehicle to show the following symptoms:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><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><li>Vehicle <a href=\"https:\/\/www.carparts.com\/blog\/my-car-wont-start-what-should-i-do\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"refuses to start\">refuses to start<\/a><\/li><li>Vehicle enters &ldquo;<a href=\"https:\/\/www.carparts.com\/blog\/web-stories\/what-is-limp-mode\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"limp mode\">limp mode<\/a>&rdquo;<\/li><li>The traction control system or stability control might get disabled<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the U0401 Code<\/h2>\n\n\n\n<p>While the U0401 code might have a list of common causes, you will still need to verify what specifically is wrong with your vehicle. Keep in mind that the steps for diagnosing this and other <a href=\"https:\/\/www.carparts.com\/blog\/search-obd2-codes-list\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"trouble codes\">trouble codes<\/a> may vary depending on your vehicle specifications.<\/p>\n\n\n\n<p>Diagnosing DTCs requires a lot of technical knowledge and may need specialized tools. If you don&rsquo;t think you&rsquo;re up to the task, you shouldn&rsquo;t hesitate to let a professional mechanic do the job for you.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Fix the U0401 Code<\/h2>\n\n\n\n<p>Attempting to fix the U0402 code can be difficult especially if you don&rsquo;t have the right tools and knowledge. If you have any doubts, feel free to consult a trusted mechanic. If you think you have the automotive know-how to work on your vehicle, make sure to follow the right steps because repair procedures can vary greatly between different makes and models.<\/p>\n\n\n\n<p>It&rsquo;s vital that you find reliable sources and how-to guides. You can try checking guides like those from Chilton or an ALLDATA single vehicle subscription. You can also <a href=\"https:\/\/www.carparts.com\/blog\/why-you-should-always-consult-a-repair-manual\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"consult your vehicle manual\">consult your vehicle manual<\/a>, as they might have important information that can help you.<\/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\"> 2<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>Is your check engine light on? Using a scan tool can help you identify your vehicle&rsquo;s problem. If the U0401&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/u0401-code-invalid-data-received-from-ecm-pcm-a\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":71871,"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],"ppma_author":[2607,2855],"class_list":{"0":"post-71859","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":"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>U0401 Code: Invalid Data Received from ECM \/ PCM \u201cA\u201d - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Did the U0401 code appear on your scanner? 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Learn about its definition, common causes, and usual symptoms in this article.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/u0401-code-invalid-data-received-from-ecm-pcm-a\/\" \/>\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=\"2022-09-06T09:01:41+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-08-09T07:56:29+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/08\/checking-car-for-trouble-code.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1500\" \/>\n\t<meta property=\"og:image:height\" content=\"1000\" \/>\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=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/u0401-code-invalid-data-received-from-ecm-pcm-a\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/u0401-code-invalid-data-received-from-ecm-pcm-a\\\/\"},\"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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