{"id":74800,"date":"2022-10-09T19:23:29","date_gmt":"2022-10-10T02:23:29","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=74800"},"modified":"2023-09-04T16:32:30","modified_gmt":"2023-09-04T23:32:30","slug":"p0766-code-shift-solenoid-d-performance-stuck-off","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p0766-code-shift-solenoid-d-performance-stuck-off\/","title":{"rendered":"P0766 Code: Shift Solenoid &#8220;D&#8221; Performance\/Stuck Off"},"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-column_377a44-29 > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_377a44-29 > .kt-inside-inner-col,.kadence-column_377a44-29 > .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_377a44-29 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_377a44-29 > .kt-inside-inner-col{flex-direction:column;}.kadence-column_377a44-29 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_377a44-29 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_377a44-29{position:relative;}@media all and (max-width: 1024px){.kadence-column_377a44-29 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_377a44-29 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_377a44-29 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-dbd4cc  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-a4d490\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_00c34d-71, .wp-block-kadence-advancedheading.kt-adv-heading_00c34d-71[data-kb-block=\"kb-adv-heading_00c34d-71\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_00c34d-71 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_00c34d-71[data-kb-block=\"kb-adv-heading_00c34d-71\"] 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_00c34d-71 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_00c34d-71[data-kb-block=\"kb-adv-heading_00c34d-71\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_00c34d-71 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_00c34d-71\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>The P0766 code stands for &ldquo;Shift Solenoid &ldquo;D&rdquo; Performance\/Stuck Off.&rdquo;<\/li><li>When this code is logged, it means that the powertrain control module (PCM) isn&rsquo;t getting the ideal response from the shift solenoid&rsquo;s &ldquo;D&rdquo; circuit.<\/li><li>Some of the most common causes of a logged P0766 code include low transmission fluid level, faulty transmission shift solenoid, wiring issues, and problems with the transmission control module (TCM).<\/li><li>If this code is present, you might notice issues like an illuminated check engine light, increased fuel consumption, and shifting problems.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Shift solenoids control the flow of hydraulic fluid through an automatic transmission. Taking their cue from 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), they adjust the transmission&rsquo;s hydraulic pressure to engage the clutch pack with the right gear ratio. They enable the TCM to shift the transmission into the right gear ratio to get the most engine performance out of as little RPM as possible.&nbsp;<\/p>\n\n\n\n<p>The TCM will log a P0766 code if it determines that the shift solenoid in the D circuit is not performing as designed and desired.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P0766 Code Mean?<\/h2>\n\n\n\n<p>The <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) P0766 indicates &ldquo;Shift Solenoid &ldquo;D&rdquo; Performance\/Stuck Off.&rdquo; It applies to the solenoid in the D circuit.<\/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\/10\/automatic-transmission-on-SUV-related-to-p0766-code-1024x683.jpg\" alt=\"automatic transmission on SUV related to p0766 code\" class=\"wp-image-74815\" width=\"1024\" height=\"683\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/automatic-transmission-on-SUV-related-to-p0766-code-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/automatic-transmission-on-SUV-related-to-p0766-code-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/automatic-transmission-on-SUV-related-to-p0766-code-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/automatic-transmission-on-SUV-related-to-p0766-code-1536x1025.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/automatic-transmission-on-SUV-related-to-p0766-code-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/automatic-transmission-on-SUV-related-to-p0766-code-1200x800.jpg 1200w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/automatic-transmission-on-SUV-related-to-p0766-code-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/automatic-transmission-on-SUV-related-to-p0766-code.jpg 2000w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>In most automatic transmissions, each gear has one shift solenoid associated with it.<\/figcaption><\/figure>\n\n\n\n<p>In most automatic transmissions, each gear has one shift solenoid associated with it. Each solenoid also has a circuit through which the TCM can keep track of the device.<\/p>\n\n\n\n<p>The shift solenoids control how much <a href=\"https:\/\/www.carparts.com\/automatic-transmission-fluid\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"transmission fluid\">transmission fluid<\/a> flows between different hydraulic circuits. Each solenoid is in charge of a valve in the <a href=\"https:\/\/www.carparts.com\/valve-body\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"valve body\">valve body<\/a>, which leads to a clutch pack.<\/p>\n\n\n\n<p>When it opens its associated valve, hydraulic fluid enters the clutches and bands that change the transmission gear. The hydraulic pressure applied by the fluid shifts the transmission into a different gear.<\/p>\n\n\n\n<p>The TCM regularly checks its shift solenoid circuits for any problems, such as a stuck scenario. If the computer doesn&rsquo;t get the right response from the D circuit, it will set the generic transmission code P0766.<\/p>\n\n\n\n<p><em><strong>Note:<\/strong> The definition of code P0766 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<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 Causes of a Code P0766?<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/www.carparts.com\/blog\/how-to-check-automatic-transmission-fluid\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Low transmission fluid level\">Low transmission fluid level<\/a><\/li><li>Faulty transmission shift solenoid<\/li><li>Wiring problems, including grounded, shorted, and corroded wires<\/li><li>Bad TCM<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Common Symptoms of a Code P0766?<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/carparts.com\/blog\/check-engine-light-flashing\" target=\"_blank\" rel=\"noreferrer noopener nofollow\" aria-label=\"Illuminated check engine light\">Illuminated check engine light<\/a><\/li><li>Higher fuel consumption<\/li><li>Transmission doesn&rsquo;t shift correctly<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P0766 Code<\/h2>\n\n\n\n<p>The P0766 code is a generic transmission code that various makes and models can log. However, this does not mean that there is a one-size-fits-all solution to identify its underlying problem.<\/p>\n\n\n\n<p>If you&rsquo;re not confident about conducting diagnostic tests on your vehicle, it&rsquo;s a good idea to bring it to a professional mechanic. Otherwise, you can go ahead and diagnose the issue yourself. To help you get started, here is a video that can give you an idea of what the 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=\"Transmission Shift Solenoid\" width=\"500\" height=\"375\" src=\"https:\/\/www.youtube.com\/embed\/24gkmDDV0C8?start=7&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 P0766 Code<\/h2>\n\n\n\n<p>Attempting to fix a P0766 code can become a challenging task if you don&rsquo;t have the right tools and know-how to test the TCM&rsquo;s shift solenoids. In most cases, it&rsquo;s best to leave the job to professionals.<\/p>\n\n\n\n<p>For DIYers who would rather test and replace their vehicle&rsquo;s TCM pressure control solenoid on their own, it will be helpful to rely on the appropriate <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 refer to an online repair database\">repair manual or refer to an online repair database<\/a>.<\/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>Shift solenoids control the flow of hydraulic fluid through an automatic transmission. Taking their cue from the transmission control module&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p0766-code-shift-solenoid-d-performance-stuck-off\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":74816,"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":[2151,1323,1222,3168],"ppma_author":[2607,2855],"class_list":{"0":"post-74800","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-automatic-transmission-fluid-2","9":"tag-engine-control-module-2","10":"tag-transmission-control-module","11":"tag-valve-body","12":"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>P0766 Code: Shift Solenoid &quot;D&quot; Performance\/Stuck Off - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Learn what a P0766 code means, the possible causes, and the common symptoms associated with this 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\/p0766-code-shift-solenoid-d-performance-stuck-off\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0766 Code: Shift Solenoid &quot;D&quot; Performance\/Stuck Off - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Learn what a P0766 code means, the possible causes, and the common symptoms associated with this code.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/p0766-code-shift-solenoid-d-performance-stuck-off\/\" \/>\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=\"2022-10-10T02:23:29+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-09-04T23:32:30+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/automatic-transmission-with-oil-pan-removed.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2000\" \/>\n\t<meta property=\"og:image:height\" content=\"1500\" \/>\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\\\/p0766-code-shift-solenoid-d-performance-stuck-off\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0766-code-shift-solenoid-d-performance-stuck-off\\\/\"},\"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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