{"id":71062,"date":"2022-08-09T22:42:30","date_gmt":"2022-08-10T05:42:30","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=71062"},"modified":"2023-08-31T20:14:40","modified_gmt":"2023-09-01T03:14:40","slug":"p2305-code-ignition-coil-b-secondary-circuit","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p2305-code-ignition-coil-b-secondary-circuit\/","title":{"rendered":"P2305 Code: Ignition Coil \u201cB\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_6fe524-16 > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_6fe524-16 > .kt-inside-inner-col,.kadence-column_6fe524-16 > .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_6fe524-16 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_6fe524-16 > .kt-inside-inner-col{flex-direction:column;}.kadence-column_6fe524-16 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_6fe524-16 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_6fe524-16{position:relative;}@media all and (max-width: 1024px){.kadence-column_6fe524-16 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_6fe524-16 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_6fe524-16 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-e497ec  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-766895\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_338505-fe, .wp-block-kadence-advancedheading.kt-adv-heading_338505-fe[data-kb-block=\"kb-adv-heading_338505-fe\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_338505-fe mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_338505-fe[data-kb-block=\"kb-adv-heading_338505-fe\"] 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_338505-fe img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_338505-fe[data-kb-block=\"kb-adv-heading_338505-fe\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_338505-fe summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_338505-fe\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>The P2305 code stands for &ldquo;Ignition Coil &lsquo;B&rsquo; Secondary Circuit,&rdquo; which means the powertrain control module (PCM) detects an abnormal voltage condition in the ignition coil&rsquo;s secondary circuit.<\/li><li>Some possible causes of the P2305 code include a faulty ignition coil, worn-out spark plugs, and circuit issues.<\/li><li>An illuminated check engine light, misfiring, and poor engine performance are common symptoms of the P2305 code.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>You might&rsquo;ve encountered a P2305 code while using a scan tool to diagnose your vehicle and wondered what to do. <a href=\"https:\/\/www.carparts.com\/blog\/search-obd2-codes-list\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"OBD-II codes\">OBD-II codes<\/a> are fairly complicated and require a certain level of auto repair knowledge to fully understand and address. We&rsquo;ve compiled the most important information about this diagnostic trouble code (DTC) so you can learn more about it.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P2305 Code Mean?<\/h2>\n\n\n\n<p>P2305 stands for &ldquo;Ignition Coil &lsquo;B&rsquo; Secondary Circuit.&rdquo; It&rsquo;s a generic powertrain code that can show up in various makes and models equipped with OBD-II.<\/p>\n\n\n\n<p>A P2305 code can register in a vehicle&rsquo;s powertrain control module (PCM) if the PCM detects an abnormal voltage condition in the ignition coil&rsquo;s secondary circuit. This code is usually&nbsp; 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\/checking-ignition-coil-1024x683.jpg\" alt=\"checking ignition coil\" class=\"wp-image-71071\" width=\"1024\" height=\"683\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/checking-ignition-coil-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/checking-ignition-coil-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/checking-ignition-coil-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/checking-ignition-coil-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/checking-ignition-coil-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/checking-ignition-coil.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>A P2305 code can register in a vehicle&rsquo;s PCM if it detects an abnormal voltage condition in the ignition coil&rsquo;s secondary circuit.<\/figcaption><\/figure>\n\n\n\n<p>The letter &ldquo;B&rdquo; can refer to the ignition coil&rsquo;s secondary control circuit with the &ldquo;B&rdquo; designation. The location of ignition coil &ldquo;B&rdquo; might vary depending on the vehicle&rsquo;s model, but it usually refers to the <a href=\"https:\/\/www.carparts.com\/ignition-coil\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"ignition coil\">ignition coil<\/a> at cylinder number two.<\/p>\n\n\n\n<p>On a modern vehicle, the ignition coil&rsquo;s secondary circuit usually consists of the spark plug and secondary windings inside the coil-on-plug ignition coil. 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 crankshaft position sensor), 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;B&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 P2305 might be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database to learn how to fix a P2305 code.<\/em><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Common Causes of the P2305 Code?<\/h2>\n\n\n\n<p>The problems that trigger a P2305 code can be caused by a number of factors. Here are some of the most common causes of issues that set a P2305 code.<\/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<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\/worn-out-spark-plug-1024x681.jpg\" alt=\"worn out spark plug\" class=\"wp-image-71072\" width=\"1024\" height=\"681\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/worn-out-spark-plug-1024x681.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/worn-out-spark-plug-300x199.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/worn-out-spark-plug-768x510.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/worn-out-spark-plug-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/worn-out-spark-plug-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/worn-out-spark-plug.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>One common cause of the P2305 code is worn-out spark plugs.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Common Symptoms of the P2305 Code?<\/h2>\n\n\n\n<p>If a P2305 code is accompanied by other DTCs, you might observe symptoms that aren&rsquo;t listed here. However, if your PCM is only storing a P2305 code, your vehicle might exhibit the following symptoms.<\/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<h2 class=\"wp-block-heading\">How to Diagnose the P2305 Code<\/h2>\n\n\n\n<p>The diagnostic procedure for a P2305 code might differ from vehicle to vehicle. What might work to resolve a P2305 in a <a href=\"https:\/\/www.carparts.com\/dodge\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Dodge\">Dodge<\/a> might not work for a <a href=\"https:\/\/www.carparts.com\/jeep\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Jeep\">Jeep<\/a>. You&rsquo;ll 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 a repair manual\">consult a repair manual<\/a> or database if you plan on troubleshooting this code yourself. The following video will give you an idea of how you might address this DTC, but you&rsquo;ll still need to do some research on your vehicle. If you don&rsquo;t have the required skills to troubleshoot a P2305 code, it&rsquo;s best to leave it to a professional.<\/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 To Diagnose A Check Engine Light :Codes P2305 P0352 P0351  P0300\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/in4UlnNDkBI?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 P2305 Code<\/h2>\n\n\n\n<p>A P2305 code can indicate one or several problems with your vehicle&rsquo;s system. There are multiple ways to fix the problems related to this code, but you have to be skilled and knowledgeable enough to perform the necessary diagnosis and repairs. You can try searching for technical service bulletins that are related to your problem. Some of them are readily <a href=\"https:\/\/www.carparts.com\/blog\/best-online-resources-to-help-you-learn-how-to-fix-cars\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"available online\">available online<\/a>. You can use this information as a reference when repairing your vehicle.<\/p>\n\n\n\n<p>You can also look for Chilton repair manuals and sign up for ALLDATA&rsquo;s single-vehicle subscription service for detailed information on your specific vehicle.<\/p>\n\n\n\n<p>If you don&rsquo;t have the confidence to do some DIY repairs, you can also hire a mechanic to do them for you. They can run tests using their scan tools and do the appropriate repairs.<\/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>You might&rsquo;ve encountered a P2305 code while using a scan tool to diagnose your vehicle and wondered what to do&#8230;. <a href=\"https:\/\/www.carparts.com\/blog\/p2305-code-ignition-coil-b-secondary-circuit\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":71070,"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-71062","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 v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P2305 Code: Ignition Coil \u201cB\u201d Secondary Circuit - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Find out what the P2305 code means, its causes and symptoms, and how to address it 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\/p2305-code-ignition-coil-b-secondary-circuit\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P2305 Code: Ignition Coil \u201cB\u201d Secondary Circuit - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Find out what the P2305 code means, its causes and symptoms, and how to address it in this article. Read more.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/p2305-code-ignition-coil-b-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=\"2022-08-10T05:42:30+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-09-01T03:14:40+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/ignition-coils-of-a-car.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\\\/p2305-code-ignition-coil-b-secondary-circuit\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p2305-code-ignition-coil-b-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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