{"id":46263,"date":"2021-11-30T23:21:43","date_gmt":"2021-12-01T07:21:43","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=46263"},"modified":"2024-12-19T04:55:39","modified_gmt":"2024-12-19T12:55:39","slug":"u0140-code-lost-communication-with-body-control-module","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/u0140-code-lost-communication-with-body-control-module\/","title":{"rendered":"U0140 Code: Lost Communication With Body Control Module"},"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\"> 4<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column46263_72c0aa-1d > .kt-inside-inner-col,.kadence-column46263_72c0aa-1d > .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-column46263_72c0aa-1d > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column46263_72c0aa-1d > .kt-inside-inner-col{flex-direction:column;}.kadence-column46263_72c0aa-1d > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column46263_72c0aa-1d > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column46263_72c0aa-1d{position:relative;}@media all and (max-width: 1024px){.kadence-column46263_72c0aa-1d > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column46263_72c0aa-1d > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column46263_72c0aa-1d inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-ba1f05  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-5a9faf\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading46263_960d91-60, .wp-block-kadence-advancedheading.kt-adv-heading46263_960d91-60[data-kb-block=\"kb-adv-heading46263_960d91-60\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading46263_960d91-60 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading46263_960d91-60[data-kb-block=\"kb-adv-heading46263_960d91-60\"] 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-heading46263_960d91-60 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading46263_960d91-60[data-kb-block=\"kb-adv-heading46263_960d91-60\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading46263_960d91-60 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading46263_960d91-60\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The U0140 code stands for &ldquo;Lost Communication With Body Control Module (BCM)&rdquo;, which usually means the BCM isn&rsquo;t properly transmitting or receiving signals from various switches and sensors in your vehicle.<\/li>\n\n\n\n<li>Damaged wires, BCM internal hardware failure, and data network problems are some common causes of the U0140 code.<\/li>\n\n\n\n<li>Some common symptoms of the U0140 code include illuminated warning lights and malfunctioning door locks and power windows.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Your vehicle has a body control module (BCM) that receives information from different switches and sensors scattered throughout your vehicle. This part is in charge of different body functions, such as the keyless entry, mirror features, washers, and wipers. If something goes wrong and the BCM can&rsquo;t receive or send information properly, it can trigger <a href=\"https:\/\/www.carparts.com\/blog\/search-obd2-codes-list\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"trouble codes\">trouble codes<\/a>, such as code U0140.<\/p>\n\n\n\n<p>There are multiple networks on today&rsquo;s vehicles and when one or more modules stop talking, a U series code is stored. That&rsquo;s what this is about.<\/p>\n\n\n\n<p>If you&rsquo;re using a scan tool and a U0140 code pops up, here&rsquo;s some info that&rsquo;s helpful to know.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"552\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/car-body-control-module-1024x552.jpg\" alt=\"car body control module\" class=\"wp-image-46267\" style=\"width:1024px;height:552px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/car-body-control-module-1024x552.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/car-body-control-module-300x162.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/car-body-control-module-768x414.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/car-body-control-module-150x81.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/car-body-control-module.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">The U0140 code generally means that the BCM isn&rsquo;t properly transmitting or receiving signals.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the U0140 Code Mean?<\/h2>\n\n\n\n<p>U0140 is a generic diagnostic trouble code (DTC) that stands for &ldquo;Lost Communication With Body Control Module.&rdquo; This code generally means that the BCM isn&rsquo;t properly transmitting or receiving signals.<\/p>\n\n\n\n<p>Keep in mind that there are multiple networks on today&rsquo;s vehicles and when one or more modules stop talking, a U series code is stored.<\/p>\n\n\n\n<p>A U0140 code can have a wide variety of indications. It&rsquo;s usually related to component failure or wiring problems with the BCM. However, this code may also be triggered by complications with the data network itself. The network serves as a communication line that connects the BCM to the vehicle&rsquo;s other modules. If a short or electrical issue causes the network to become faulty, a code U0140 may show up on your scanner.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"738\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/11\/body-control-module-schematic-1024x738.png\" alt=\"body control module schematic\" class=\"wp-image-77693\" style=\"width:1024px;height:738px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/11\/body-control-module-schematic-1024x738.png 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/11\/body-control-module-schematic-300x216.png 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/11\/body-control-module-schematic-768x553.png 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/11\/body-control-module-schematic-150x108.png 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/11\/body-control-module-schematic.png 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">Body control module schematic | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<p><em><strong>Note:<\/strong> The definition of code U0140 may 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<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 Possible Causes of the U0140 Code?<\/h2>\n\n\n\n<p>Many problems can trigger a U0140 code, depending on your vehicle&rsquo;s make and model. Here&rsquo;s a list of this trouble code&rsquo;s most common causes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Circuit problems, such as a damaged wire or poor connection<\/li>\n\n\n\n<li><a href=\"https:\/\/www.carparts.com\/blog\/can-a-bad-bcm-cause-a-car-not-to-start\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"BCM internal hardware failure\">BCM internal hardware failure<\/a> or software in need of an update<\/li>\n\n\n\n<li>Data network problems<\/li>\n\n\n\n<li>Depleted <a href=\"https:\/\/www.carparts.com\/battery\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"battery\">battery<\/a><\/li>\n<\/ul>\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\/2021\/11\/door-lock-of-a-car-1024x683.jpg\" alt=\"door lock of a car\" class=\"wp-image-46268\" style=\"width:1024px;height:683px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/door-lock-of-a-car-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/door-lock-of-a-car-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/door-lock-of-a-car-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/door-lock-of-a-car-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/door-lock-of-a-car-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/door-lock-of-a-car.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">Inoperative body-related functions, such as door locks, is one of the common symptoms of code U0140.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Common Symptoms of the U0140 Code?<\/h2>\n\n\n\n<p>There are many symptoms that are linked&nbsp;to a U0140 code. These symptoms can also change, depending on what&rsquo;s causing the trouble code.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Illuminated warning lights<\/li>\n\n\n\n<li>Inoperative body-related functions, such as door locks and power windows<\/li>\n\n\n\n<li><a href=\"https:\/\/www.carparts.com\/blog\/my-car-wont-start-what-should-i-do\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Vehicle won&rsquo;t start\">Vehicle won&rsquo;t start<\/a><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the U0140 Code<\/h2>\n\n\n\n<p>It can be difficult to diagnose a U0140 code. It takes a high level of technical skill, because this code can have a wide variety of potential causes, depending on the vehicle&rsquo;s make and model. If you&rsquo;re uncertain as It&rsquo;s best to ask a professional to help you fix the problems that are triggering the U0140 code. You can also get a better understanding of how to diagnose a code U0140 by watching this video:<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"GMC Yukon XL 2008 model trouble code U0140 lost communication with Body control module\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/IsAMWHZZkl0?start=70&amp;feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">How to Fix the U0140 Code<\/h2>\n\n\n\n<p>There&rsquo;s no magic fix for vehicle problems that trigger trouble codes. Mechanics require extensive training and years of experience to efficiently troubleshoot OBD codes, including U0140. Fixing your vehicle can be too complicated to do at home. Ask a mechanic for help to get your vehicle fixed and sort out trouble codes as soon as possible.<\/p>\n\n\n\n<p>If you want to learn more about the U0140 code, you can try doing your own research to learn more about the problems causing it. Check for any underlying complications related to the trouble code. Gather all the information you need and refer to a reliable <a href=\"https:\/\/www.carparts.com\/blog\/why-you-should-always-consult-a-repair-manual\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"repair manual or online repair database\">repair manual or online repair database<\/a> to determine the next appropriate steps.<\/p>\n\n\n\n<p>What solves the issues that trigger a U0140 in a <a href=\"https:\/\/www.carparts.com\/body-control-module\/chevrolet\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Chevy\">Chevy<\/a> may work for a <a href=\"https:\/\/www.carparts.com\/body-control-module\/ford\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Ford\">Ford<\/a>. Take your time and be careful. If troubleshooting becomes too technical for you, don&rsquo;t think twice about consulting a mechanic.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Where to Get a New Body Control Module for Your Vehicle<\/h2>\n\n\n\n<p>Your vehicle&rsquo;s damaged <a href=\"https:\/\/www.carparts.com\/body-control-module\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"body control module\">body control module<\/a> will render several electrical functions useless, so why not get a durable replacement right away?<\/p>\n\n\n\n<p><a href=\"https:\/\/www.carparts.com\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"CarParts.com\">CarParts.com<\/a> prides itself with fast shipping services, delivering the part you need straight to your doorstep in as fast as two business days. This means that your vehicle won&rsquo;t have to stay cooped up in the garage for too long.<\/p>\n\n\n\n<p>Enjoy a hassle-free shopping experience when you enter your vehicle&rsquo;s year, make, and model into our vehicle selector. This will narrow down the catalog to compatible body control modules for your daily driver.<\/p>\n\n\n\n<p>You can also use our toll-free hotline to place your order, and our round-the-clock customer service representatives will be ready to assist you.<\/p>\n\n\n\n<p>With CarParts.com, you won&rsquo;t have to worry about going over budget, either. All our products come with a low-price guarantee to help you get the best value for your money.<\/p>\n\n\n\n<p>Got the wrong part? No problem. File a claim through our Returns Center and get your money back within 60 days upon purchasing the product.<\/p>\n\n\n\n<p>Shop now, and take advantage of our unbeatable prices!<\/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\"> 4<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>Your vehicle has a body control module (BCM) that receives information from different switches and sensors scattered throughout your vehicle&#8230;. <a href=\"https:\/\/www.carparts.com\/blog\/u0140-code-lost-communication-with-body-control-module\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":46266,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":true,"_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":[1882],"ppma_author":[2607,2985],"class_list":{"0":"post-46263","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-body-control-module","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>U0140 Code: Lost Communication With Body Control Module - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Get useful information about the causes and symptoms of code U0140 in this article. Learn what to do if you get this code. Read on.\" \/>\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\/u0140-code-lost-communication-with-body-control-module\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"U0140 Code: Lost Communication With Body Control Module - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Get useful information about the causes and symptoms of code U0140 in this article. Learn what to do if you get this code. 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Guided by CarParts.com&#039;s thorough editorial process, our team strives to produce guides and resources DIYers and casual car owners can trust.\",\"knowsAbout\":\"Auto Repair, Car Maintenance, Auto Parts, Car Reviews\",\"publishingPrinciples\":\"\\\/blog\\\/our-team\\\/\",\"url\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/author\\\/thecpteam\\\/\",\"sameAs\":\"https:\\\/\\\/www.facebook.com\\\/carpartscom, https:\\\/\\\/twitter.com\\\/CarPartscom, https:\\\/\\\/www.youtube.com\\\/@CarPartscomOfficial\\\/, https:\\\/\\\/www.instagram.com\\\/carpartscom\\\/\"},{\"@type\":\"Person\",\"$id\":\"4\",\"name\":\"Richard McCuistian\",\"jobTitle\":\"ASE Master Automobile Technician\",\"description\":\"Richard McCuistian has worked for nearly 50 years in the automotive field as a professional technician, an instructor, and a freelance automotive writer for Motor Age, ACtion magazine, Power Stroke Registry, and others. 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