{"id":78358,"date":"2025-08-15T14:45:55","date_gmt":"2025-08-15T19:45:55","guid":{"rendered":"https:\/\/www.emanualonline.com\/blog\/?p=78358"},"modified":"2025-08-15T14:45:55","modified_gmt":"2025-08-15T19:45:55","slug":"p0855-obd2-drive-switch-input-circuit-high","status":"publish","type":"post","link":"https:\/\/www.emanualonline.com\/blog\/p0855-obd2-drive-switch-input-circuit-high","title":{"rendered":"P0855 OBD2: Drive Switch Input Circuit High"},"content":{"rendered":"<p>The P0855 code is part of the OBD-II system and indicates a malfunction in the drive switch input circuit. This code is typically associated with the transmission control module (TCM) and highlights an issue with how the vehicle&#8217;s overdrive\/tow switch is communicating with the engine computer (PCM).<\/p>\n<h2>What Does the P0855 Code Mean?<\/h2>\n<p>The P0855 code signifies that the drive switch input circuit is reporting a high signal to the TCM. This means that the overdrive\/tow switch, which informs the PCM whether the vehicle is towing, is either malfunctioning or sending an implausible signal.<\/p>\n<h2>What Causes the P0855 Code?<\/h2>\n<p>Several factors can lead to the P0855 code being triggered, including:<\/p>\n<ul>\n<li>Shift lever assembly failure<\/li>\n<li>Transmission Control Module (TCM) failure<\/li>\n<li>Wiring issues related to the drive switch input circuit<\/li>\n<\/ul>\n<h2>What Are the Symptoms of the P0855 Code?<\/h2>\n<p>Drivers experiencing the P0855 code may notice several symptoms, such as:<\/p>\n<ul>\n<li>Transmission shifting issues<\/li>\n<li>Warning lights on the dashboard<\/li>\n<li>Reduced engine performance, especially when towing<\/li>\n<\/ul>\n<h2>How Serious Is the P0855 Code?<\/h2>\n<p>The severity of the P0855 code is classified as urgent. Ignoring this code can lead to significant malfunctions in the vehicle&#8217;s transmission system, which could result in further damage and compromise driver safety.<\/p>\n<h2>How to Diagnose the P0855 Code<\/h2>\n<p>Diagnosing the P0855 code involves several steps:<\/p>\n<ol>\n<li>Use an OBD-II scanner to confirm the P0855 code.<\/li>\n<li>Inspect the drive switch and related wiring for damage or corrosion.<\/li>\n<li>Check the shift lever assembly for proper function.<\/li>\n<li>Test the Transmission Control Module (TCM) to ensure it is operating correctly.<\/li>\n<\/ol>\n<h2>Common Repairs for the P0855 Code<\/h2>\n<p>Common repairs associated with the P0855 code may include:<\/p>\n<ul>\n<li>Replacing the faulty drive switch<\/li>\n<li>Repairing or replacing damaged wiring<\/li>\n<li>Replacing the Transmission Control Module (TCM) if necessary<\/li>\n<\/ul>\n<h2>How Much Does It Cost to Fix the P0855 Code?<\/h2>\n<p>The cost to repair the P0855 code can vary widely based on the specific issue causing the code. Simple repairs like replacing a drive switch may cost between $100 and $200, while more complex repairs involving the TCM could range from $400 to $800.<\/p>\n<h2>Can I Fix the P0855 Code Myself?<\/h2>\n<p>While some experienced DIY mechanics may be able to address the P0855 code themselves, it is crucial to have a thorough understanding of automotive systems. If you are not confident in your skills, it is advisable to seek professional help to ensure proper diagnosis and repair.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The P0855 code is part of the OBD-II system and indicates a malfunction in the drive switch input circuit. This code is typically associated with the transmission control module (TCM) and highlights an issue with how the vehicle&#8217;s overdrive\/tow switch is communicating with the engine computer (PCM). What Does the P0855 Code Mean? The P0855 &hellip;<\/p>\n","protected":false},"author":26,"featured_media":92840,"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-78358","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 P0855 \u2013 Causes, Symptoms, and Repairs<\/title>\n<meta name=\"description\" content=\"Learn all about the P0855 code, what causes drive switch input circuit high, and how to diagnose and fix common issues to maintain optimal engine 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\/p0855-obd2-drive-switch-input-circuit-high\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0855 OBD2: Drive Switch Input Circuit High\" \/>\n<meta property=\"og:description\" content=\"The P0855 code is part of the OBD-II system and indicates a malfunction in the drive switch input circuit. This code is typically associated with the\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.emanualonline.com\/blog\/p0855-obd2-drive-switch-input-circuit-high\" \/>\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=\"2025-08-15T19:45:55+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0855-obd2-drive-switch-input-circuit-high.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\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" 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He also loves cats, Johnny Cash and Subarus.","sameAs":["https:\/\/www.facebook.com\/jee514","https:\/\/www.instagram.com\/rat_in_chief\/","https:\/\/www.linkedin.com\/in\/jean-claude-landry-857781186\/"],"url":"https:\/\/www.emanualonline.com\/blog\/author\/jclandry"}]}},"uagb_featured_image_src":{"full":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0855-obd2-drive-switch-input-circuit-high.png",1200,675,false],"thumbnail":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0855-obd2-drive-switch-input-circuit-high-150x150.png",150,150,true],"medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0855-obd2-drive-switch-input-circuit-high-300x169.png",300,169,true],"medium_large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0855-obd2-drive-switch-input-circuit-high-768x432.png",618,348,true],"large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0855-obd2-drive-switch-input-circuit-high-1024x576.png",618,348,true],"1536x1536":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0855-obd2-drive-switch-input-circuit-high.png",1200,675,false],"2048x2048":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0855-obd2-drive-switch-input-circuit-high.png",1200,675,false],"tie-small":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0855-obd2-drive-switch-input-circuit-high-110x75.png",110,75,true],"tie-medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0855-obd2-drive-switch-input-circuit-high-403x215.png",403,215,true],"tie-large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0855-obd2-drive-switch-input-circuit-high-310x205.png",310,205,true],"slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0855-obd2-drive-switch-input-circuit-high-660x330.png",660,330,true],"big-slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0855-obd2-drive-switch-input-circuit-high-1050x525.png",1050,525,true]},"uagb_author_info":{"display_name":"JC Landry","author_link":"https:\/\/www.emanualonline.com\/blog\/author\/jclandry"},"uagb_comment_info":0,"uagb_excerpt":"The P0855 code is part of the OBD-II system and indicates a malfunction in the drive switch input circuit. This code is typically associated with the transmission control module (TCM) and highlights an issue with how the vehicle&#8217;s overdrive\/tow switch is communicating with the engine computer (PCM). What Does the P0855 Code Mean? The P0855&hellip;","_links":{"self":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/78358","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=78358"}],"version-history":[{"count":1,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/78358\/revisions"}],"predecessor-version":[{"id":85057,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/78358\/revisions\/85057"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media\/92840"}],"wp:attachment":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media?parent=78358"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/categories?post=78358"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/tags?post=78358"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}