{"id":80097,"date":"2025-05-25T10:56:58","date_gmt":"2025-05-25T15:56:58","guid":{"rendered":"https:\/\/www.emanualonline.com\/blog\/?p=80097"},"modified":"2025-06-04T05:11:35","modified_gmt":"2025-06-04T10:11:35","slug":"p2685-obd2-actuator-supply-voltage-c-circuit-low","status":"publish","type":"post","link":"https:\/\/www.emanualonline.com\/blog\/p2685-obd2-actuator-supply-voltage-c-circuit-low","title":{"rendered":"P2685 OBD2: Actuator Supply Voltage &#8220;C&#8221; Circuit Low"},"content":{"rendered":"<h2>What Does the P2685 Code Mean?<\/h2>\n<p>The P2685 OBD-II code indicates that there is a problem with the actuator supply voltage &#8220;C&#8221; circuit being low. This code is set when the engine control module (PCM) detects an incorrect signal from one of the transmission actuators that control gear engagement and holding.<\/p>\n<h2>What Causes the P2685 Code?<\/h2>\n<p>This code can be triggered by several factors, primarily involving the following issues:<\/p>\n<ul>\n<li>Internal transmission failure<\/li>\n<li>Powertrain Control Module (PCM) failure<\/li>\n<li>Transmission actuator failure<\/li>\n<li>Transmission Control Module (TCM) failure<\/li>\n<li>Wiring issue<\/li>\n<\/ul>\n<h2>What Are the Symptoms of the P2685 Code?<\/h2>\n<p>Common symptoms associated with the P2685 code include:<\/p>\n<ul>\n<li>Transmission may not shift properly<\/li>\n<li>Unusual noises from the transmission<\/li>\n<li>Check Engine Light illuminated<\/li>\n<\/ul>\n<h2>How Serious Is the P2685 Code?<\/h2>\n<p>The P2685 code is considered urgent. If not addressed promptly, it can lead to severe transmission issues that may cause further damage to the vehicle or pose safety risks to the driver and passengers.<\/p>\n<h2>How to Diagnose the P2685 Code<\/h2>\n<p>Diagnosing the P2685 code involves the following steps:<\/p>\n<ol>\n<li>Using an OBD-II scanner, confirm that the P2685 code is present.<\/li>\n<li>Inspect the wiring and connectors related to the actuator supply voltage &#8220;C&#8221; circuit for damage or corrosion.<\/li>\n<li>Test the voltage levels at the actuator to ensure they meet specifications.<\/li>\n<li>Check for any other codes that may be present and could affect the transmission.<\/li>\n<li>Perform a visual inspection of the transmission components and actuators.<\/li>\n<\/ol>\n<h2>Common Repairs for the P2685 Code<\/h2>\n<p>Depending on the diagnosis, common repairs for the P2685 code may include:<\/p>\n<ul>\n<li>Repairing or replacing damaged wiring or connectors<\/li>\n<li>Replacing a faulty actuator<\/li>\n<li>Reprogramming or replacing the PCM or TCM<\/li>\n<li>Performing a complete transmission rebuild if internal failure is detected<\/li>\n<\/ul>\n<h2>How Much Does It Cost to Fix the P2685 Code?<\/h2>\n<p>The cost to fix the P2685 code can vary widely based on the underlying issue. Repairs can range from $100 for wiring repairs to over $2,000 for a complete transmission rebuild or replacement. It&#8217;s crucial to get a proper diagnosis to determine the exact cost.<\/p>\n<h2>Can I Fix the P2685 Code Myself?<\/h2>\n<p>While some basic troubleshooting can be performed by a DIY mechanic, such as checking for wiring issues, the complexities of the transmission system typically require professional diagnosis and repair. Given the potential for serious damage, it&#8217;s recommended to seek help from a qualified mechanic if the P2685 code is present.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What Does the P2685 Code Mean? The P2685 OBD-II code indicates that there is a problem with the actuator supply voltage &#8220;C&#8221; circuit being low. This code is set when the engine control module (PCM) detects an incorrect signal from one of the transmission actuators that control gear engagement and holding. What Causes the P2685 &hellip;<\/p>\n","protected":false},"author":26,"featured_media":82352,"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-80097","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 P2685 \u2013 Causes, Symptoms, and Repairs<\/title>\n<meta name=\"description\" content=\"Learn all about the P2685 code, what causes actuator supply voltage &quot;C&quot; circuit low, and how to diagnose and fix common issues to maintain optimal transmission 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\/p2685-obd2-actuator-supply-voltage-c-circuit-low\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P2685 OBD2: Actuator Supply Voltage &quot;C&quot; Circuit Low\" \/>\n<meta property=\"og:description\" content=\"What Does the P2685 Code Mean? The P2685 OBD-II code indicates that there is a problem with the actuator supply voltage &quot;C&quot; circuit being low. 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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\/05\/p2685-obd2-actuator-supply-voltage-c-circuit-low.png",1200,675,false],"thumbnail":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2685-obd2-actuator-supply-voltage-c-circuit-low-150x150.png",150,150,true],"medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2685-obd2-actuator-supply-voltage-c-circuit-low-300x169.png",300,169,true],"medium_large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2685-obd2-actuator-supply-voltage-c-circuit-low-768x432.png",618,348,true],"large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2685-obd2-actuator-supply-voltage-c-circuit-low-1024x576.png",618,348,true],"1536x1536":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2685-obd2-actuator-supply-voltage-c-circuit-low.png",1200,675,false],"2048x2048":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2685-obd2-actuator-supply-voltage-c-circuit-low.png",1200,675,false],"tie-small":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2685-obd2-actuator-supply-voltage-c-circuit-low-110x75.png",110,75,true],"tie-medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2685-obd2-actuator-supply-voltage-c-circuit-low-403x215.png",403,215,true],"tie-large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2685-obd2-actuator-supply-voltage-c-circuit-low-310x205.png",310,205,true],"slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2685-obd2-actuator-supply-voltage-c-circuit-low-660x330.png",660,330,true],"big-slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2685-obd2-actuator-supply-voltage-c-circuit-low-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":"What Does the P2685 Code Mean? The P2685 OBD-II code indicates that there is a problem with the actuator supply voltage &#8220;C&#8221; circuit being low. This code is set when the engine control module (PCM) detects an incorrect signal from one of the transmission actuators that control gear engagement and holding. What Causes the P2685&hellip;","_links":{"self":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/80097","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=80097"}],"version-history":[{"count":3,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/80097\/revisions"}],"predecessor-version":[{"id":82405,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/80097\/revisions\/82405"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media\/82352"}],"wp:attachment":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media?parent=80097"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/categories?post=80097"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/tags?post=80097"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}