{"id":72767,"date":"2022-09-08T22:57:02","date_gmt":"2022-09-09T05:57:02","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=72767"},"modified":"2023-09-13T22:12:34","modified_gmt":"2023-09-14T05:12:34","slug":"p0742-code-torque-converter-clutch-circuit-stuck-on","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p0742-code-torque-converter-clutch-circuit-stuck-on\/","title":{"rendered":"P0742 Code: Torque Converter Clutch Circuit Stuck On"},"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_159197-1b > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_159197-1b > .kt-inside-inner-col,.kadence-column_159197-1b > .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_159197-1b > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_159197-1b > .kt-inside-inner-col{flex-direction:column;}.kadence-column_159197-1b > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_159197-1b > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_159197-1b{position:relative;}@media all and (max-width: 1024px){.kadence-column_159197-1b > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_159197-1b > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_159197-1b qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-3b168e  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-b7c6f0\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_ce083a-8d, .wp-block-kadence-advancedheading.kt-adv-heading_ce083a-8d[data-kb-block=\"kb-adv-heading_ce083a-8d\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_ce083a-8d mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_ce083a-8d[data-kb-block=\"kb-adv-heading_ce083a-8d\"] 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_ce083a-8d img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_ce083a-8d[data-kb-block=\"kb-adv-heading_ce083a-8d\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_ce083a-8d summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_ce083a-8d\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>The P0742 code stands for &ldquo;Torque Converter Clutch (TCC) Circuit Stuck On,&rdquo; which means the powertrain control module (PCM) detected a problem with the TCC circuit, causing the TCC solenoid to fail.<\/li><li>A faulty TCC solenoid, circuit issues, and valve body problems are common causes of the P0742 code.<\/li><li>An illuminated check engine light and the engine stalling or dying are common symptoms of the P0742 code.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>The torque converter clutch, which creates a mechanical connection between the engine and transmission, is controlled by the powertrain control module (PCM) via a solenoid valve. If the PCM detects a fault within the torque converter clutch circuit, the vehicle&rsquo;s computer will register a P0742 code on a scan tool.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P0742 Code Mean?<\/h2>\n\n\n\n<p>Diagnostic trouble code P0742 stands for &ldquo;Torque Converter Clutch Circuit Stuck On.&rdquo;<\/p>\n\n\n\n<p>The torque converter is typically bolted to a thin metal disc called a <a href=\"https:\/\/www.carparts.com\/flex-plate\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"flexplate\">flexplate<\/a>, with a ring gear which interfaces with the starter motor. In order to turn the engine when starting, the ring gear engages the starter motor&rsquo;s pinion gear.<\/p>\n\n\n\n<p>The clutch inside the torque converter creates a connection between the engine and transmission that increases fuel mileage and lowers transmission fluid temperatures. The <a href=\"https:\/\/www.carparts.com\/transmission-control-module\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"transmission control module (TCM)\">transmission control module (TCM)<\/a> sends a voltage to the torque converter clutch (TCC) solenoid, which sends pressurized fluid to the circuit. If the PCM detects a problem within the circuit causing the TCC solenoid to fail, the PCM will register a P0742 code.<\/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\/09\/cross-section-of-a-torque-converter-1024x683.jpg\" alt=\"cross section of a torque converter\" class=\"wp-image-73177\" width=\"1024\" height=\"683\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/cross-section-of-a-torque-converter-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/cross-section-of-a-torque-converter-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/cross-section-of-a-torque-converter-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/cross-section-of-a-torque-converter-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/cross-section-of-a-torque-converter-1200x800.jpg 1200w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/cross-section-of-a-torque-converter-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/cross-section-of-a-torque-converter.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>If the PCM detects a problem within the circuit causing the TCC solenoid to fail, it will register a P0742 code.<\/figcaption><\/figure>\n\n\n\n<p><strong><em>Note:<\/em><\/strong><em> The definition of code P0742 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 P0742 Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>Faulty <a href=\"https:\/\/www.carparts.com\/torque-converter-clutch-solenoid\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"torque converter clutch solenoid\">torque converter clutch solenoid<\/a><\/li><li>Circuit problems, 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><a href=\"https:\/\/www.carparts.com\/valve-body\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Valve body\">Valve body<\/a> problems<\/li><li><a href=\"https:\/\/www.carparts.com\/blog\/bad-torque-converter-symptoms-diagnosis-repair-faqs\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Torque converter failure\">Torque converter failure<\/a><\/li><li>Internal transmission failure<\/li><li>Failed TCM<\/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 P0742 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>The <a href=\"https:\/\/www.carparts.com\/blog\/car-shuts-off-while-driving-causes-what-to-do\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"engine stalls or dies\">engine stalls or dies<\/a> at highway speeds (happens more regularly with GM vehicles)<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P0742 Code<\/h2>\n\n\n\n<p>DTC P0742 is a generic powertrain code that applies to a variety of vehicles with OBD-II. However, specific diagnostic steps can vary depending on the vehicle&rsquo;s make and model. You&rsquo;ll have to <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&rsquo;s repair manual\">consult your vehicle&rsquo;s repair manual<\/a> to find the right fix for your <a href=\"https:\/\/www.carparts.com\/blog\/car-shuts-off-while-driving-causes-what-to-do\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"DTC\">DTC<\/a>&rsquo;s underlying problems. You can use the following video to 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-4-3 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Late GM vehicles with codes P0742 or P1887\" width=\"500\" height=\"375\" src=\"https:\/\/www.youtube.com\/embed\/Vel2mF2-So4?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<p>If you don&rsquo;t have sufficient auto repair skills and knowledge, we suggest hiring a professional to inspect your vehicle and run the appropriate tests. A trained mechanic can help you avoid costly DIY mistakes.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Fix the P0742 Code<\/h2>\n\n\n\n<p>A P0742 code can indicate one or more problems with your vehicle. You&rsquo;ll have to find the underlying causes of this code to figure out the appropriate fix. Good thing there are plenty of OBD-II <a href=\"https:\/\/www.carparts.com\/blog\/best-online-resources-to-help-you-learn-how-to-fix-cars\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"resources online\">resources online<\/a> to help you diagnose and repair your vehicle. Check out Chilton repair manuals and get ALLDATA&rsquo;s subscription to get more information on your vehicle and its potential problems.<\/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>The torque converter clutch, which creates a mechanical connection between the engine and transmission, is controlled by the powertrain control&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p0742-code-torque-converter-clutch-circuit-stuck-on\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":73176,"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":[],"ppma_author":[2607,2855],"class_list":{"0":"post-72767","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P0742 Code: Torque Converter Clutch Circuit Stuck On - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Not sure what triggers a P0742 code? 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