{"id":72126,"date":"2022-09-02T00:31:59","date_gmt":"2022-09-02T07:31:59","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=72126"},"modified":"2023-09-29T21:46:49","modified_gmt":"2023-09-30T04:46:49","slug":"p0888-code-tcm-power-relay-sense-circuit","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p0888-code-tcm-power-relay-sense-circuit\/","title":{"rendered":"P0888 Code: TCM Power Relay Sense Circuit"},"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_28ca28-d8 > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_28ca28-d8 > .kt-inside-inner-col,.kadence-column_28ca28-d8 > .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_28ca28-d8 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_28ca28-d8 > .kt-inside-inner-col{flex-direction:column;}.kadence-column_28ca28-d8 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_28ca28-d8 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_28ca28-d8{position:relative;}@media all and (max-width: 1024px){.kadence-column_28ca28-d8 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_28ca28-d8 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_28ca28-d8 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-18d4a3  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-fabecb\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_5c6656-61, .wp-block-kadence-advancedheading.kt-adv-heading_5c6656-61[data-kb-block=\"kb-adv-heading_5c6656-61\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_5c6656-61 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_5c6656-61[data-kb-block=\"kb-adv-heading_5c6656-61\"] 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_5c6656-61 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_5c6656-61[data-kb-block=\"kb-adv-heading_5c6656-61\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_5c6656-61 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_5c6656-61\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>Diagnostic trouble code (DTC) P0888 stands for &ldquo;TCM Power Relay Sense Circuit.&rdquo; The transmission control module (TCM) controls your vehicle&rsquo;s transmission.<\/li><li>Code P0888 is set when the powertrain control module (PCM) detects a voltage signal issue in the TCM power relay control circuit. It&rsquo;s often accompanied by other PCM or TCM codes.<\/li><li>Common causes of the P0888 code include a blown fuse or bad relay, circuit issues, and a malfunctioning TCM or PCM.<\/li><li>Common symptoms of the P0888 code include an illuminated check engine light, the transmission not shifting properly, and the vehicle getting stuck in &ldquo;limp&rdquo; mode.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Your transmission is controlled by the <a href=\"https:\/\/www.carparts.com\/transmission-control-module\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"transmission control module\">transmission control module<\/a> (TCM) in your vehicle. Because this device is critical to the operation of your vehicle, it must always be in good working condition.<\/p>\n\n\n\n<p>If your scan tool returns a P0888 code, you should get your TCM and transmission checked. This code is one of many trouble codes associated with a fault in the TCM power relay circuit.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P0888 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) P0888 stands for &ldquo;TCM Power Relay Sense Circuit.&rdquo; The code is set once the PCM detects a voltage signal issue in the TCM power relay control circuit. If your scan tool retrieves a P0888 code, there&rsquo;s a high chance there are other PCM or TCM codes that come along with it.<\/p>\n\n\n\n<p>Once the vehicle&rsquo;s computer detects a voltage issue within the power relay circuit, it&rsquo;ll trigger fault codes like the P0888. This transmission control system fault is typically caused by an electrical failure. The check engine light might also be illuminated due to this fault.<\/p>\n\n\n\n<p><em><strong>Note:<\/strong> The definition of code P0888 can differ according to the vehicle manufacturer. Check 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 P0888 Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/www.carparts.com\/blog\/car-fuse-facts-what-you-need-to-know-about-automotive-fuses\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Blown fuse\">Blown fuse<\/a>\/bad relay<\/li><li>Circuit issues, such as a damaged wire or poor connection<\/li><li>Malfunctioning TCM or <a href=\"https:\/\/www.carparts.com\/blog\/car-pcm-meaning-symptoms-of-failure-and-more\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"PCM\">PCM<\/a> (possible programming error)<\/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 P0888 Code?<\/h2>\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>Transmission doesn&rsquo;t shift properly<\/li><li>Vehicle stuck in &ldquo;limp&rdquo; mode<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P0888 Code<\/h2>\n\n\n\n<p>DTC P0888 &nbsp;is a generic powertrain code that can be retrieved on various makes and models. Although the code is common, it doesn&rsquo;t mean that there&rsquo;s one solution that&rsquo;ll work for all vehicles.<\/p>\n\n\n\n<p>If you&rsquo;re not familiar with diagnosing transmission issues, it might be best to have a trained professional do the job for you. Otherwise, you can go ahead and do it yourself.<\/p>\n\n\n\n<p>The video below will give you an idea of what the diagnostic process might involve:<\/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=\"Transmission No Shift Case Study (P0888)\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/EF3Qb2rbAx4?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 P0888 Code<\/h2>\n\n\n\n<p>Diagnosing any TCM-related trouble code can be complicated, and the P0888 code is no exception. We strongly recommend taking your vehicle to an auto repair shop if you don&rsquo;t have the tools and experience to repair this fault.<\/p>\n\n\n\n<p>If you have advanced auto repair know-how and decide to work on your own vehicle, it&rsquo;s best to brush up on your knowledge before attempting any fixes. Repair manuals like those from Chilton or an online repair database contain <a href=\"https:\/\/www.carparts.com\/blog\/why-you-should-always-consult-a-repair-manual\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"vehicle-specific repair information\">vehicle-specific repair information<\/a>, so you might want to check those out before you begin.<\/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>Your transmission is controlled by the transmission control module (TCM) in your vehicle. Because this device is critical to the&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p0888-code-tcm-power-relay-sense-circuit\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":72128,"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":[1222],"ppma_author":[2607,2855],"class_list":{"0":"post-72126","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-transmission-control-module","9":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P0888 Code: TCM Power Relay Sense Circuit - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Find out what logging a P0888 code means, its common causes, and the symptoms associated with this trouble code.\" \/>\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\/p0888-code-tcm-power-relay-sense-circuit\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0888 Code: TCM Power Relay Sense Circuit - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Find out what logging a P0888 code means, its common causes, and the symptoms associated with this trouble code.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/p0888-code-tcm-power-relay-sense-circuit\/\" \/>\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=\"2022-09-02T07:31:59+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-09-30T04:46:49+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/08\/Transmission-Control-Module-TCM-triggered-P0888-code.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2000\" \/>\n\t<meta property=\"og:image:height\" content=\"1335\" \/>\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\\\/p0888-code-tcm-power-relay-sense-circuit\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0888-code-tcm-power-relay-sense-circuit\\\/\"},\"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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