{"id":67693,"date":"2022-03-22T20:19:10","date_gmt":"2022-03-23T03:19:10","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=67693"},"modified":"2023-09-04T18:31:33","modified_gmt":"2023-09-05T01:31:33","slug":"p0674-code-cylinder-4-glow-plug-circuit","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p0674-code-cylinder-4-glow-plug-circuit\/","title":{"rendered":"P0674 Code: Cylinder 4 Glow Plug 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_6be5ec-e3 > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_6be5ec-e3 > .kt-inside-inner-col,.kadence-column_6be5ec-e3 > .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_6be5ec-e3 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_6be5ec-e3 > .kt-inside-inner-col{flex-direction:column;}.kadence-column_6be5ec-e3 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_6be5ec-e3 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_6be5ec-e3{position:relative;}@media all and (max-width: 1024px){.kadence-column_6be5ec-e3 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_6be5ec-e3 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_6be5ec-e3 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-7e312a  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-85852c\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_ccf08a-6b, .wp-block-kadence-advancedheading.kt-adv-heading_ccf08a-6b[data-kb-block=\"kb-adv-heading_ccf08a-6b\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_ccf08a-6b mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_ccf08a-6b[data-kb-block=\"kb-adv-heading_ccf08a-6b\"] 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_ccf08a-6b img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_ccf08a-6b[data-kb-block=\"kb-adv-heading_ccf08a-6b\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_ccf08a-6b summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_ccf08a-6b\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>DTC P0674 means &ldquo;Cylinder 4 Glow Plug Circuit\/Open.&rdquo; It&rsquo;s logged when the PCM detects that the glow plug circuit in cylinder 4 has a malfunction.<\/li><li>The common causes of this error code include a faulty glow plug (cylinder 4), a bad glow plug module, and circuit issues.<\/li><li>Some of the common symptoms of this error code include hard starting and poor engine performance.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Using an OBD-II scanner is a great way to identify what&rsquo;s wrong with your vehicle. If you encounter the P0674 code, read this article to learn more about its causes, symptoms, and definition.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P0674 Code Mean?<\/h2>\n\n\n\n<p>Diagnostic trouble code (DTC) P0674 means &ldquo;Cylinder 4 Glow Plug Circuit\/Open.&rdquo; The code is set when the powertrain control module (PCM) detects that the glow plug circuit in cylinder 4 has a malfunction.<\/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\/03\/glow-plugs-of-a-car-1024x557.jpg\" alt=\"glow plugs of a car\" class=\"wp-image-67718\" width=\"1024\" height=\"557\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/glow-plugs-of-a-car-1024x557.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/glow-plugs-of-a-car-300x163.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/glow-plugs-of-a-car-768x418.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/glow-plugs-of-a-car-150x82.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/glow-plugs-of-a-car.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>Once your PCM detects that the glow plug circuit in cylinder 4 has a malfunction, it will set the code P0674.<\/figcaption><\/figure>\n\n\n\n<p><a href=\"https:\/\/www.carparts.com\/glow-plug\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Glow plugs\">Glow plugs<\/a> are heating devices used to help diesel engines start, especially in cold temperatures. They&rsquo;re pencil-shaped pieces of metal with a heating element at the tip.<\/p>\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 the P0674 code can 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 P0674 Code?<\/h2>\n\n\n\n<p>A number of issues can cause the P0674 code to be stored. These include the following:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/www.carparts.com\/blog\/the-top-4-symptoms-of-bad-glow-plugs\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Faulty glow plug\">Faulty glow plug<\/a> in cylinder 4<\/li><li>Circuit issues, such as a damaged wire or poor connection<\/li><li>Faulty glow plug control module<\/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\/03\/damaged-glow-plug-1024x603.jpg\" alt=\"damaged glow plug\" class=\"wp-image-67719\" width=\"1024\" height=\"603\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/damaged-glow-plug-1024x603.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/damaged-glow-plug-300x177.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/damaged-glow-plug-768x452.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/damaged-glow-plug-150x88.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/damaged-glow-plug.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>A damaged glow plug in cylinder 4 can set the code P0674.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Common Symptoms of the P0674 Code?<\/h2>\n\n\n\n<p>Here are some of the common symptoms of the P0674 code:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/www.carparts.com\/blog\/my-car-wont-start-what-should-i-do\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"The engine won&rsquo;t start\">The engine won&rsquo;t start<\/a><\/li><li>Difficulty starting in cold weather<\/li><li><a href=\"\/\/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>Engine producing less power while it&rsquo;s cold<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P0674 Code<\/h2>\n\n\n\n<p>Even though the code definition indicates that the glow plug could be the problem, this might not always be the case. You need to properly diagnose the issue before you can do any fixes, or else you might end up replacing a functioning component. You might need to visually inspect the glow plug and its wires. However, this can be difficult. You might need special tools and training to be able to properly do this job. We recommend consulting a trusted mechanic to diagnose the issue.&nbsp;<\/p>\n\n\n\n<p>You can also check out the video below to learn more about the diagnostic process:<\/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=\"Diagnose Glow Plug 6.6 Duramax-Angry Mechanic P0671,P0672,P0673,P0674,P0675 P0676,P0677,P0678\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/XZFAxRjxgHI?start=2&amp;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 P0674 Code&nbsp;<\/h2>\n\n\n\n<p>Since vehicle designs may vary, there isn&rsquo;t a magic bullet to fix <a href=\"https:\/\/www.carparts.com\/blog\/search-obd2-codes-list\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"OBD-II trouble codes\">OBD-II trouble codes<\/a>. If you&rsquo;re not familiar with troubleshooting DTCs, then the best course of action is to leave the task to a trusted mechanic.<\/p>\n\n\n\n<p>However, if you have the appropriate knowledge and hands-on experience with repairs, then the first step in properly fixing the P0674 code is getting an accurate diagnosis. After identifying the cause of the P0674 code, then you can start consulting <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=\"online repair resources and guides\">online repair resources and guides<\/a> for possible fixes.<\/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>Using an OBD-II scanner is a great way to identify what&rsquo;s wrong with your vehicle. If you encounter the P0674&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p0674-code-cylinder-4-glow-plug-circuit\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":67717,"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":[2714],"ppma_author":[2607,2855],"class_list":{"0":"post-67693","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-glow-plug","9":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P0674 Code: Cylinder 4 Glow Plug Circuit - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Learn about the P0674 code\u2019s definition, common causes, and symptoms in this article. 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