{"id":83155,"date":"2023-05-04T16:56:03","date_gmt":"2023-05-04T23:56:03","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=83155"},"modified":"2024-12-19T05:27:10","modified_gmt":"2024-12-19T13:27:10","slug":"p0700-transmission-control-system-mil-request","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p0700-transmission-control-system-mil-request\/","title":{"rendered":"P0700: Transmission Control System (MIL Request)"},"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-column83155_3f4911-d8 > .kt-inside-inner-col,.kadence-column83155_3f4911-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-column83155_3f4911-d8 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column83155_3f4911-d8 > .kt-inside-inner-col{flex-direction:column;}.kadence-column83155_3f4911-d8 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column83155_3f4911-d8 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column83155_3f4911-d8{position:relative;}@media all and (max-width: 1024px){.kadence-column83155_3f4911-d8 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column83155_3f4911-d8 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column83155_3f4911-d8 inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-abf3ca  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-bcf34b\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading83155_71d10f-2f, .wp-block-kadence-advancedheading.kt-adv-heading83155_71d10f-2f[data-kb-block=\"kb-adv-heading83155_71d10f-2f\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading83155_71d10f-2f mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading83155_71d10f-2f[data-kb-block=\"kb-adv-heading83155_71d10f-2f\"] 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-heading83155_71d10f-2f img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading83155_71d10f-2f[data-kb-block=\"kb-adv-heading83155_71d10f-2f\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading83155_71d10f-2f summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading83155_71d10f-2f\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Diagnostic trouble code (DTC) P0700 is defined as &ldquo;Transmission Control System (MIL Request).&rdquo;<\/li>\n\n\n\n<li>The P0700 code triggers when the transmission control module (TCM) detects something wrong with the throttle speed sensor, motor speed sensor, and output shaft speed sensor.<\/li>\n\n\n\n<li>The P0700 code can be caused by low transmission fluid levels, dirty transmission fluid, a malfunctioning engine coolant sensor, slipping converter clutch, a bad valve body, or failing shift solenoids.<\/li>\n\n\n\n<li>A triggered P0700 code can result in symptoms like hesitation during acceleration, shift problems, stalling, decreased fuel economy, and an illuminated check engine light.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Modern vehicles come equipped with automatic transmission systems that allow drivers to shift gears automatically.&nbsp; Newer automatic transmissions have a <a href=\"https:\/\/www.carparts.com\/transmission-control-module\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"transmission control module\">transmission control module<\/a> (TCM) that monitors the activity in the transmission and sends the data to the powertrain control module (PCM).<\/p>\n\n\n\n<p>Code P0700 is a generic trouble code related to a fault in the transmission control system. This code will appear in the <a href=\"https:\/\/www.carparts.com\/engine-control-module\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"engine control module\">engine control module<\/a> whenever the transmission control module is reporting a fault.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P0700 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) P0700 stands for &ldquo;Transmission Control System (MIL Request).&rdquo;<\/p>\n\n\n\n<p>The TCM monitors the sensors and actuators in the transmission system and sends the data to the PCM. This module monitors the throttle speed sensor, motor speed sensor, and <a href=\"https:\/\/www.carparts.com\/automatic-transmission-output-shaft-speed-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"output shaft speed sensor\">output shaft speed sensor<\/a>. Once the module detects something wrong with the transmission controls, it&rsquo;ll trigger the P0700 code.<\/p>\n\n\n\n<p>The transmission control module and the engine control module are closely associated by default even though they&rsquo;re separate modules. They usually communicate over a high speed CAN bus to expedite reaction time between the two modules. Transmission modules differ greatly between OEMs and platforms but they all have basically the same job.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"796\" height=\"1024\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/05\/ford-pickup-transmission-lead-frame-796x1024.jpg\" alt=\"ford pickup transmission lead frame\" class=\"wp-image-83156\" style=\"width:796px;height:1024px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/05\/ford-pickup-transmission-lead-frame-796x1024.jpg 796w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/05\/ford-pickup-transmission-lead-frame-233x300.jpg 233w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/05\/ford-pickup-transmission-lead-frame-768x989.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/05\/ford-pickup-transmission-lead-frame-1193x1536.jpg 1193w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/05\/ford-pickup-transmission-lead-frame-150x193.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/05\/ford-pickup-transmission-lead-frame.jpg 1243w\" sizes=\"(max-width: 796px) 100vw, 796px\"><figcaption class=\"wp-element-caption\">Ford pickup transmissions have what is called a &ldquo;lead frame&rdquo; (pronounced &ldquo;leed frame&rdquo;) that contains shaft speed sensors and the TCM. This unit bolts to the valve body and is usually replaced with the valve body but is available separately on some year models. | Image Source: Richard McCuistian.<\/figcaption><\/figure>\n\n\n\n<p>Note that P0700 is a generic informational code. It doesn&rsquo;t point to any specific fault in your engine. It only indicates that something is wrong with the transmission.<\/p>\n\n\n\n<p>The code P0700 could be logged with other trouble codes, such as P0700, <a href=\"https:\/\/www.carparts.com\/blog\/p0701-code-transmission-control-system-range-performance\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"P0701\">P0701<\/a>, and <a href=\"https:\/\/www.carparts.com\/blog\/p0702-code-transmission-control-system-electrical\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"P0702\">P0702<\/a>. They can cause drivability issues, so it&rsquo;s best not to drive your vehicle once your OBD scan tool retrieves these codes.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">A Note About the TCM<\/h3>\n\n\n\n<p>Let&rsquo;s unravel some of the abbreviations. When the transmission controls are in a separate unit (TCM), the engine control module is referred to as an ECM rather than a PCM.<\/p>\n\n\n\n<p>Older electronic transmissions were controlled by the same computer that controlled the fuel injection and ignition. That module was abbreviated &ldquo;PCM,&rdquo; which stands for &ldquo;powertrain control module.&rdquo;<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Older electronic transmissions were controlled by the same computer that controlled the fuel injection and ignition. That module was abbreviated &ldquo;PCM,&rdquo; which stands for &ldquo;powertrain control module.&rdquo;<\/p>\n<cite><em>&ndash;&nbsp;<\/em><a href=\"https:\/\/www.carparts.com\/blog\/author\/richardmccuistian\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Richard McCuistian, ASE Certified Master Automobile Technician\">Richard McCuistian, ASE Certified Master Automobile Technician<\/a><\/cite><\/blockquote>\n\n\n\n<p>There were exceptions to TCM\/ECM evolution. <a href=\"https:\/\/carparts.com\/jeep\" target=\"_blank\" rel=\"noreferrer noopener nofollow\" aria-label=\"Jeeps\">Jeeps<\/a> as far back as 1987 had a separate transmission control module and <a href=\"https:\/\/www.carparts.com\/chrysler\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Chryslers\">Chryslers<\/a> tended to separate the engine controls from the transmission controls on their platforms. However, many other platforms began putting the transmission controls and the engine controls in the same unit.<\/p>\n\n\n\n<p>Of late, there are such intense electronics dedicated to engine controls that engineers just about always house the transmission controls in a separate unit.<\/p>\n\n\n\n<p>That TCM is what this code is referring to.<\/p>\n\n\n\n<p><strong><em>Note:<\/em><\/strong><em> The definition of code P0700 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<h2 class=\"wp-block-heading\">What are the Common Causes of the P0700 Code?<\/h2>\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<ul class=\"wp-block-list\">\n<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>\n\n\n\n<li>Dirty transmission fluid<\/li>\n\n\n\n<li>Dirty or contaminated TCM<\/li>\n\n\n\n<li>Malfunctioning engine coolant sensor<\/li>\n\n\n\n<li>Slipping converter clutch<\/li>\n\n\n\n<li>Bad <a href=\"https:\/\/www.carparts.com\/valve-body\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"valve body\">valve body<\/a><\/li>\n\n\n\n<li>Failing shift solenoids<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Common Symptoms of the P0700 Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<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>\n\n\n\n<li>Activated fail-safe mode<\/li>\n\n\n\n<li><a href=\"https:\/\/www.carparts.com\/blog\/car-hesitates-when-accelerating-causes-and-faq\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Hesitation\">Hesitation<\/a><\/li>\n\n\n\n<li>Problems changing gears<\/li>\n\n\n\n<li><a href=\"https:\/\/www.carparts.com\/blog\/car-shuts-off-while-driving-causes-what-to-do\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Stalling\">Stalling<\/a> and rough driving<\/li>\n\n\n\n<li>Decreased fuel economy<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P0700 Code<\/h2>\n\n\n\n<p>Various makes and models can log P0700 because it&rsquo;s a generic informational code. Its symptoms and causes could be similar across different vehicles, but that doesn&rsquo;t mean there&rsquo;s one diagnostic and repair procedure that would work for all.<\/p>\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\/2023\/05\/obd-scanner-detected-p0700-code-1024x683.jpg\" alt=\"obd scanner detected p0700 code\" class=\"wp-image-83157\" style=\"width:1024px;height:683px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/05\/obd-scanner-detected-p0700-code-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/05\/obd-scanner-detected-p0700-code-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/05\/obd-scanner-detected-p0700-code-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/05\/obd-scanner-detected-p0700-code-1536x1025.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/05\/obd-scanner-detected-p0700-code-scaled.jpg 2048w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/05\/obd-scanner-detected-p0700-code-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/05\/obd-scanner-detected-p0700-code-1200x800.jpg 1200w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/05\/obd-scanner-detected-p0700-code-150x100.jpg 150w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">Various makes and models can log P0700 because it&rsquo;s a generic informational code.<\/figcaption><\/figure>\n\n\n\n<p>Diagnosing this trouble code usually requires specific tools and an in-depth knowledge of the transmission control system. So if you don&rsquo;t have the right equipment or aren&rsquo;t familiar with the system, it&rsquo;s best to go to a mechanic for a diagnosis.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Fix the P0700 Code<\/h2>\n\n\n\n<p>Fixing the P0700 code can be challenging. That&rsquo;s why we recommend asking a trusted professional to fix this problem for you if you&rsquo;re not a seasoned automotive DIYer.<\/p>\n\n\n\n<p>But if you&rsquo;re someone who&rsquo;s knowledgeable about trouble codes and the transmission, you can address the issue. However, make sure that you read up and research the problem first before doing anything with your vehicle. Guides like those from Chilton or an ALLDATA subscription can be very helpful when fixing a P0700 code.<\/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>Modern vehicles come equipped with automatic transmission systems that allow drivers to shift gears automatically.&nbsp; Newer automatic transmissions have a&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p0700-transmission-control-system-mil-request\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":83158,"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":[1323,1222],"ppma_author":[2607,2985],"class_list":{"0":"post-83155","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":"tag-transmission-control-module","10":"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>P0700: Transmission Control System (MIL Request) - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Did your scan tool read a P0700 code? Find out what it means, its common causes, and how to address it.\" \/>\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\/p0700-transmission-control-system-mil-request\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0700: Transmission Control System (MIL Request) - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Did your scan tool read a P0700 code? 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