{"id":78036,"date":"2025-08-24T13:42:55","date_gmt":"2025-08-24T18:42:55","guid":{"rendered":"https:\/\/www.emanualonline.com\/blog\/?p=78036"},"modified":"2025-08-24T13:42:55","modified_gmt":"2025-08-24T18:42:55","slug":"p0682-obd2-cylinder-12-glow-plug-circuit-open","status":"publish","type":"post","link":"https:\/\/www.emanualonline.com\/blog\/p0682-obd2-cylinder-12-glow-plug-circuit-open","title":{"rendered":"P0682 OBD2: Cylinder 12 Glow Plug Circuit\/Open"},"content":{"rendered":"<p>The P0682 code is an OBD-II diagnostic trouble code that indicates an issue with the glow plug circuit for cylinder 12. This code is primarily associated with diesel engines where glow plugs are used to warm the engine for optimal starting performance.<\/p>\n<h2>What Does the P0682 Code Mean?<\/h2>\n<p>The P0682 code signifies that the engine control module (PCM) has detected a malfunction in the glow plug circuit for cylinder 12. This typically means that the glow plug is either defective, there is a fault in the wiring harness, or the glow plug control module itself has failed.<\/p>\n<h2>What Causes the P0682 Code?<\/h2>\n<p>Several factors can trigger the P0682 code, including:<\/p>\n<ul>\n<li>Glow plug control module failure<\/li>\n<li>Failure of the glow plug itself<\/li>\n<li>Issues with the glow plug wiring harness<\/li>\n<\/ul>\n<h2>What Are the Symptoms of the P0682 Code?<\/h2>\n<p>When the P0682 code is present, you may experience:<\/p>\n<ul>\n<li>Engine may not start<\/li>\n<li>Hard or no start in cold weather<\/li>\n<\/ul>\n<h2>How Serious Is the P0682 Code?<\/h2>\n<p>The P0682 code is classified as urgent, indicating that immediate attention is necessary. Ignoring this code can lead to severe engine damage or safety risks for the driver and passengers due to potential no-start conditions.<\/p>\n<h2>How to Diagnose the P0682 Code<\/h2>\n<p>To diagnose the P0682 code, follow these steps:<\/p>\n<ol>\n<li>Use an OBD-II scanner to confirm the code and check for any additional codes.<\/li>\n<li>Inspect the glow plugs, wiring harness, and control module for visible damage.<\/li>\n<li>Perform a resistance test on the glow plug and harness to ensure proper functionality.<\/li>\n<li>Check the power supply and ground connections to the glow plug control module.<\/li>\n<\/ol>\n<h2>Common Repairs for the P0682 Code<\/h2>\n<p>Common repairs for the P0682 code may include:<\/p>\n<ul>\n<li>Replacing the glow plug<\/li>\n<li>Repairing or replacing the glow plug control module<\/li>\n<li>Fixing any issues with the wiring harness<\/li>\n<\/ul>\n<h2>How Much Does It Cost to Fix the P0682 Code?<\/h2>\n<p>The cost to fix the P0682 code can vary widely based on the specific issue and labor rates in your area. On average, replacing a glow plug may cost between $100 to $300, while replacing the control module can range from $200 to $600.<\/p>\n<h2>Can I Fix the P0682 Code Myself?<\/h2>\n<p>While some DIY enthusiasts may feel comfortable diagnosing and replacing glow plugs, it is essential to have a solid understanding of the vehicle&#8217;s electrical systems. If you&#8217;re unsure, it\u2019s best to consult with a professional mechanic to ensure proper diagnosis and repairs.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The P0682 code is an OBD-II diagnostic trouble code that indicates an issue with the glow plug circuit for cylinder 12. This code is primarily associated with diesel engines where glow plugs are used to warm the engine for optimal starting performance. What Does the P0682 Code Mean? The P0682 code signifies that the engine &hellip;<\/p>\n","protected":false},"author":26,"featured_media":93711,"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-78036","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 P0682 \u2013 Causes, Symptoms, and Repairs<\/title>\n<meta name=\"description\" content=\"Learn all about the P0682 code, what causes cylinder 12 glow plug circuit\/open issues, and how to diagnose and fix common problems 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\/p0682-obd2-cylinder-12-glow-plug-circuit-open\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0682 OBD2: Cylinder 12 Glow Plug Circuit\/Open\" \/>\n<meta property=\"og:description\" content=\"The P0682 code is an OBD-II diagnostic trouble code that indicates an issue with the glow plug circuit for cylinder 12. This code is primarily associated\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.emanualonline.com\/blog\/p0682-obd2-cylinder-12-glow-plug-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=\"2025-08-24T18:42:55+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0682-obd2-cylinder-12-glow-plug-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\" 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\/p0682-obd2-cylinder-12-glow-plug-circuitopen.png",1200,675,false],"thumbnail":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0682-obd2-cylinder-12-glow-plug-circuitopen-150x150.png",150,150,true],"medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0682-obd2-cylinder-12-glow-plug-circuitopen-300x169.png",300,169,true],"medium_large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0682-obd2-cylinder-12-glow-plug-circuitopen-768x432.png",618,348,true],"large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0682-obd2-cylinder-12-glow-plug-circuitopen-1024x576.png",618,348,true],"1536x1536":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0682-obd2-cylinder-12-glow-plug-circuitopen.png",1200,675,false],"2048x2048":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0682-obd2-cylinder-12-glow-plug-circuitopen.png",1200,675,false],"tie-small":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0682-obd2-cylinder-12-glow-plug-circuitopen-110x75.png",110,75,true],"tie-medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0682-obd2-cylinder-12-glow-plug-circuitopen-403x215.png",403,215,true],"tie-large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0682-obd2-cylinder-12-glow-plug-circuitopen-310x205.png",310,205,true],"slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0682-obd2-cylinder-12-glow-plug-circuitopen-660x330.png",660,330,true],"big-slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0682-obd2-cylinder-12-glow-plug-circuitopen-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 P0682 code is an OBD-II diagnostic trouble code that indicates an issue with the glow plug circuit for cylinder 12. This code is primarily associated with diesel engines where glow plugs are used to warm the engine for optimal starting performance. What Does the P0682 Code Mean? The P0682 code signifies that the engine&hellip;","_links":{"self":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/78036","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=78036"}],"version-history":[{"count":1,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/78036\/revisions"}],"predecessor-version":[{"id":84735,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/78036\/revisions\/84735"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media\/93711"}],"wp:attachment":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media?parent=78036"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/categories?post=78036"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/tags?post=78036"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}