{"id":71077,"date":"2022-08-09T22:45:27","date_gmt":"2022-08-10T05:45:27","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=71077"},"modified":"2023-09-04T18:29:09","modified_gmt":"2023-09-05T01:29:09","slug":"p2308-code-ignition-coil-c-secondary-circuit","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p2308-code-ignition-coil-c-secondary-circuit\/","title":{"rendered":"P2308 Code: Ignition Coil \u201cC\u201d Secondary Circuit"},"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\"> 3<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column_d2e873-bd > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_d2e873-bd > .kt-inside-inner-col,.kadence-column_d2e873-bd > .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-column_d2e873-bd > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_d2e873-bd > .kt-inside-inner-col{flex-direction:column;}.kadence-column_d2e873-bd > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_d2e873-bd > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_d2e873-bd{position:relative;}@media all and (max-width: 1024px){.kadence-column_d2e873-bd > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_d2e873-bd > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_d2e873-bd qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-ad3701  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-95241b\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_2715e4-f2, .wp-block-kadence-advancedheading.kt-adv-heading_2715e4-f2[data-kb-block=\"kb-adv-heading_2715e4-f2\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_2715e4-f2 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_2715e4-f2[data-kb-block=\"kb-adv-heading_2715e4-f2\"] 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-heading_2715e4-f2 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_2715e4-f2[data-kb-block=\"kb-adv-heading_2715e4-f2\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_2715e4-f2 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_2715e4-f2\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>The diagnostic trouble code (DTC) P2308 indicates &ldquo;Ignition Coil &lsquo;C&rsquo; Secondary Circuit.&rdquo;<\/li><li>Your vehicle&rsquo;s powertrain control module (PCM) will trigger this code if it detects an abnormal voltage in ignition coil C&rsquo;s secondary circuit.<\/li><li>Common causes of the P2308 code are a faulty ignition coil, circuit issues, worn-out spark plugs, and PCM problems.<\/li><li>A vehicle that sets a P2308 code can show symptoms like check engine light illumination, misfiring, poor engine performance, and reduced fuel efficiency.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>A P2308 code might appear on your scan tool while you&rsquo;re diagnosing your vehicle. There are many ways to resolve <a href=\"https:\/\/www.carparts.com\/blog\/search-obd2-codes-list\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"diagnostic trouble codes (DTCs)\">diagnostic trouble codes (DTCs)<\/a> like this one, but you&rsquo;ll need to figure out what triggered it in the first place so that you can perform the appropriate repairs. If you have any questions about code P2308 and how to troubleshoot it, we&rsquo;ll try to answer them in this OBD-II article.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P2308 Code Mean?<\/h2>\n\n\n\n<p>A P2308 code is usually defined as &ldquo;Ignition Coil &lsquo;C&rsquo; Secondary Circuit.&rdquo; This is a generic powertrain code that applies to select modern vehicles that have OBD-II.<\/p>\n\n\n\n<p>Your vehicle&rsquo;s powertrain control module (PCM) can store a P2308 if it detects an abnormal voltage condition in the ignition coil&rsquo;s secondary circuit designated with the letter &ldquo;C&rdquo;. The exact location of ignition coil &ldquo;C&rdquo; can vary depending on the vehicle&rsquo;s model, but it usually refers to the ignition coil at cylinder number three. A P2308 code is usually be accompanied by an illuminated malfunction indicator lamp.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/obd-ii-scanner-tool-1024x683.jpg\" alt=\"obd ii scanner tool\" class=\"wp-image-71096\" width=\"1024\" height=\"683\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/obd-ii-scanner-tool-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/obd-ii-scanner-tool-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/obd-ii-scanner-tool-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/obd-ii-scanner-tool-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/obd-ii-scanner-tool-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/obd-ii-scanner-tool.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>Your car&rsquo;s PCM can store a P2308 if it detects an abnormal voltage condition in the ignition coil&rsquo;s secondary circuit designated with the letter &ldquo;C&rdquo;.<\/figcaption><\/figure>\n\n\n\n<p>On a modern vehicle, the ignition coil&rsquo;s secondary circuit usually consists of the <a href=\"https:\/\/www.carparts.com\/spark-plug\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"spark plug\">spark plug<\/a> and secondary windings inside the coil-on-plug <a href=\"https:\/\/www.carparts.com\/ignition-coil\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"ignition coil\">ignition coil<\/a>. Meanwhile, the ignition coil&rsquo;s primary circuit includes the primary windings inside of the coil-on-plug ignition coil, an <a href=\"https:\/\/www.carparts.com\/blog\/what-does-car-rpm-stand-for\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"engine RPM\">engine RPM<\/a> sensor (usually the <a href=\"https:\/\/www.carparts.com\/crankshaft-position-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"crankshaft position sensor\">crankshaft position sensor<\/a>), the powertrain control module (PCM), and corresponding circuitry. The ignition switch supplies battery power to the primary circuit.<\/p>\n\n\n\n<p>If the PCM detects a problem with the ignition coil &ldquo;C&rdquo; circuit, it will store code P2305 in memory.<\/p>\n\n\n\n<p>You may also watch this video to understand how ignition coil works:<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"How Ignition Coils Work | CarParts.com Parts Explained\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/87d2bGdO0IU?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\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<p><em><strong>Note:<\/strong> The definition of code P2308 might 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 P2308 Code?<\/h2>\n\n\n\n<p>The issues that set a P2308 code can be caused by a number of factors. Here are some of the most common causes.<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/www.carparts.com\/blog\/bad-ignition-coil-symptoms\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Faulty ignition coil\">Faulty ignition coil<\/a><\/li><li>Circuit issues, such as damaged <a href=\"https:\/\/www.carparts.com\/blog\/car-wiring\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"wires\">wires<\/a> and poor connections<\/li><li><a href=\"https:\/\/www.carparts.com\/blog\/bad-spark-plug-symptoms\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Worn-out spark plugs\">Worn-out spark plugs<\/a><\/li><li>An issue with the PCM, such as software in need of an update<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Common Symptoms of the P2308 Code?<\/h2>\n\n\n\n<p>DTCs other than code P2308 can be registered in your vehicle&rsquo;s PCM. This can cause confusion when diagnosing your system because some symptoms might not be listed here. However, if your PCM only has a P2308 stored, you can expect one or more of the following symptoms to manifest.<\/p>\n\n\n\n<ul class=\"wp-block-list\"><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><li>Misfiring<\/li><li>Poor engine performance<\/li><li>Reduced fuel efficiency<\/li><\/ul>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/car-ignition-coil-1024x681.jpg\" alt=\"car ignition coil\" class=\"wp-image-71097\" width=\"1024\" height=\"681\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/car-ignition-coil-1024x681.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/car-ignition-coil-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/car-ignition-coil-768x511.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/car-ignition-coil-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/car-ignition-coil-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/car-ignition-coil.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>A faulty ignition coil is one of the main causes of the P2308 code.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P2308 Code<\/h2>\n\n\n\n<p>Diagnosing a P2308 can be challenging due to the complexity of your vehicle&rsquo;s electrical system. You might end up replacing the wrong component if you don&rsquo;t know what you&rsquo;re doing. The video below shows how you might go about diagnosing a P2308 code on certain vehicles, but you still have to <a href=\"https:\/\/www.carparts.com\/blog\/why-you-should-always-consult-a-repair-manual\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"consult your vehicle&rsquo;s specific repair manual\">consult your vehicle&rsquo;s specific repair manual<\/a> or repair database to figure out the right fix. If this sounds like a lot of work, you&rsquo;re probably better off taking your vehicle to a mechanic for repairs.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Dodge Grand Caravan P2308 - Case Study\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/5mWlUuEx_xE?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">How to Fix the P2308 Code<\/h2>\n\n\n\n<p>There&rsquo;s no one way to resolve a P2308 code. You&rsquo;ll have to find the underlying problem or problems triggering this code to figure out the right fix. This usually requires some experience and knowledge in auto repair. Some manufacturers publish technical service bulletins for recurring problems online, so you might want to browse the internet for OBD-II resources. Chilton&rsquo;s repair manuals can be invaluable for DIYers. If you have some cash to spare, you can enroll in ALLDATA&rsquo;s single-vehicle subscription to get detailed information on your specific vehicle.<\/p>\n\n\n\n<p>You should never use a repair manual from another manufacturer because some terms might be different. Don&rsquo;t hesitate to call your mechanic if you don&rsquo;t feel confident in troubleshooting this DTC.<\/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\"> 3<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>A P2308 code might appear on your scan tool while you&rsquo;re diagnosing your vehicle. There are many ways to resolve&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p2308-code-ignition-coil-c-secondary-circuit\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":71095,"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":[1169],"ppma_author":[2607,2855],"class_list":{"0":"post-71077","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-ignition-coil-2","9":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P2308 Code: Ignition Coil \u201cC\u201d Secondary Circuit - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Learn about the definition, symptoms, causes, and the best approach to fix code P2308 in this article. Read more.\" \/>\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\/p2308-code-ignition-coil-c-secondary-circuit\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P2308 Code: Ignition Coil \u201cC\u201d Secondary Circuit - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Learn about the definition, symptoms, causes, and the best approach to fix code P2308 in this article. Read more.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/p2308-code-ignition-coil-c-secondary-circuit\/\" \/>\n<meta property=\"og:site_name\" content=\"In The Garage with CarParts.com\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/carpartscom\" \/>\n<meta property=\"article:published_time\" content=\"2022-08-10T05:45:27+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-09-05T01:29:09+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/replacing-an-automotive-ignition-coil.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1500\" \/>\n\t<meta property=\"og:image:height\" content=\"1000\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:site\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p2308-code-ignition-coil-c-secondary-circuit\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p2308-code-ignition-coil-c-secondary-circuit\\\/\"},\"author\":[{\"@type\":\"Person\",\"$id\":\"4\",\"name\":\"CarParts.com Research Team\",\"jobTitle\":\"Expert Automotive Writer\",\"description\":\"The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. 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