{"id":78278,"date":"2025-08-20T18:38:12","date_gmt":"2025-08-20T23:38:12","guid":{"rendered":"https:\/\/www.emanualonline.com\/blog\/?p=78278"},"modified":"2025-08-20T18:38:12","modified_gmt":"2025-08-20T23:38:12","slug":"p0802-obd2-transmission-control-system-mil-request-circuit-open","status":"publish","type":"post","link":"https:\/\/www.emanualonline.com\/blog\/p0802-obd2-transmission-control-system-mil-request-circuit-open","title":{"rendered":"P0802 OBD2: Transmission Control System MIL Request Circuit\/Open"},"content":{"rendered":"<p>The OBD-II Code P0802 refers to a Transmission Control System MIL Request Circuit\/Open. This code indicates an issue with the transmission control module (TCM) communicating with the engine computer (PCM).<\/p>\n<h2>What Does the P0802 Code Mean?<\/h2>\n<p>When the TCM detects a problem within the transmission system, it triggers the P0802 code. This can affect the vehicle&#8217;s ability to shift gears properly, leading to performance issues.<\/p>\n<h2>What Causes the P0802 Code?<\/h2>\n<p>The P0802 code is usually caused by the TCM detecting a fault in the transmission control system. This could be due to a wiring issue, a faulty TCM, or other related components that affect the transmission&#8217;s operation.<\/p>\n<h2>What Are the Symptoms of the P0802 Code?<\/h2>\n<p>Common symptoms of the P0802 code include:<\/p>\n<ul>\n<li>Increased fuel consumption<\/li>\n<li>Transmission may not shift properly<\/li>\n<\/ul>\n<h2>How Serious Is the P0802 Code?<\/h2>\n<p>The P0802 code is considered urgent as it can lead to significant malfunctions that may cause severe damage to the vehicle or pose safety risks to the driver and passengers. Immediate action is recommended.<\/p>\n<h2>How to Diagnose the P0802 Code<\/h2>\n<p>Diagnosing the P0802 code involves checking for other stored trouble codes, inspecting the wiring and connectors related to the TCM, and testing the TCM itself. A professional diagnostic tool may be required to accurately assess the situation.<\/p>\n<h2>Common Repairs for the P0802 Code<\/h2>\n<p>Repairs for the P0802 code may include:<\/p>\n<ul>\n<li>Repairing or replacing faulty wiring or connectors<\/li>\n<li>Replacing a defective TCM<\/li>\n<li>Addressing any issues with the transmission itself<\/li>\n<\/ul>\n<h2>How Much Does It Cost to Fix the P0802 Code?<\/h2>\n<p>The cost to fix the P0802 code can vary widely depending on the underlying issue. Simple wiring repairs may cost a few hundred dollars, while replacing a TCM can run upwards of $1,000 or more, depending on the make and model of the vehicle.<\/p>\n<h2>Can I Fix the P0802 Code Myself?<\/h2>\n<p>While some basic repairs may be within reach for a DIY enthusiast, the complexity of modern transmission systems means that a full diagnosis and repair are often best left to professional mechanics. Attempting to fix it without proper knowledge and tools may lead to further complications.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The OBD-II Code P0802 refers to a Transmission Control System MIL Request Circuit\/Open. This code indicates an issue with the transmission control module (TCM) communicating with the engine computer (PCM). What Does the P0802 Code Mean? When the TCM detects a problem within the transmission system, it triggers the P0802 code. This can affect the &hellip;<\/p>\n","protected":false},"author":26,"featured_media":93066,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_uag_custom_page_level_css":"","footnotes":""},"categories":[11987],"tags":[],"class_list":["post-78278","post","type-post","status-publish","format-standard","has-post-thumbnail","","category-p-obd2-codes-powertrain"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.6 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>OBD2 Code P0802 \u2013 Causes, Symptoms, and Repairs<\/title>\n<meta name=\"description\" content=\"Learn all about the P0802 code, what causes transmission control system MIL request circuit\/open issues, and how to diagnose and fix common problems to maintain optimal vehicle performance.\" \/>\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.emanualonline.com\/blog\/p0802-obd2-transmission-control-system-mil-request-circuit-open\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0802 OBD2: Transmission Control System MIL Request Circuit\/Open\" \/>\n<meta property=\"og:description\" content=\"The OBD-II Code P0802 refers to a Transmission Control System MIL Request Circuit\/Open. This code indicates an issue with the transmission control module\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.emanualonline.com\/blog\/p0802-obd2-transmission-control-system-mil-request-circuit-open\" \/>\n<meta property=\"og:site_name\" content=\"eManualOnline Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/EmanualOnline\/\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/jee514\" \/>\n<meta property=\"article:published_time\" content=\"2025-08-20T23:38:12+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0802-obd2-transmission-control-system-mil-request-circuitopen.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"675\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"JC Landry\" \/>\n<meta name=\"twitter:card\" 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This code indicates an issue with the transmission control module (TCM) communicating with the engine computer (PCM). What Does the P0802 Code Mean? When the TCM detects a problem within the transmission system, it triggers the P0802 code. This can affect the&hellip;","_links":{"self":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/78278","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/users\/26"}],"replies":[{"embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/comments?post=78278"}],"version-history":[{"count":1,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/78278\/revisions"}],"predecessor-version":[{"id":84977,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/78278\/revisions\/84977"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media\/93066"}],"wp:attachment":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media?parent=78278"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/categories?post=78278"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/tags?post=78278"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}