{"id":66656,"date":"2022-02-09T00:20:58","date_gmt":"2022-02-09T08:20:58","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=66656"},"modified":"2024-12-17T18:07:09","modified_gmt":"2024-12-18T02:07:09","slug":"p0673-code-cylinder-3-glow-plug-circuit-open","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p0673-code-cylinder-3-glow-plug-circuit-open\/","title":{"rendered":"P0673 Code: Cylinder 3 Glow Plug Circuit Open"},"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-column66656_5ece3d-73 > .kt-inside-inner-col,.kadence-column66656_5ece3d-73 > .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-column66656_5ece3d-73 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column66656_5ece3d-73 > .kt-inside-inner-col{flex-direction:column;}.kadence-column66656_5ece3d-73 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column66656_5ece3d-73 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column66656_5ece3d-73{position:relative;}@media all and (max-width: 1024px){.kadence-column66656_5ece3d-73 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column66656_5ece3d-73 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column66656_5ece3d-73 inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-73e832  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-740085\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading66656_f285b4-fa, .wp-block-kadence-advancedheading.kt-adv-heading66656_f285b4-fa[data-kb-block=\"kb-adv-heading66656_f285b4-fa\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading66656_f285b4-fa mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading66656_f285b4-fa[data-kb-block=\"kb-adv-heading66656_f285b4-fa\"] 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-heading66656_f285b4-fa img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading66656_f285b4-fa[data-kb-block=\"kb-adv-heading66656_f285b4-fa\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading66656_f285b4-fa summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading66656_f285b4-fa\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>DTC P0673 stands for &ldquo;Cylinder 3 Glow Plug Circuit Open&rdquo;<\/li>\n\n\n\n<li>This code is logged when the PCM detects that the glow plug is unable to heat up.<\/li>\n\n\n\n<li>It is commonly caused by malfunctioning glow plugs, glow plug control plug module failure, and damaged wiring connectors.<\/li>\n\n\n\n<li>Common symptoms associated with this code include a lit check engine light, difficulty starting the vehicle, and a preheat light that doesn&rsquo;t go off.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>When a diesel engine is cold, the air temperature that&rsquo;s produced as the piston rises and compresses the air is dissipated due to the amount of heat transfer required by the cylinder head.<\/p>\n\n\n\n<p>To resolve this issue, diesel engines with a pre-combustion chamber and many direct-injection diesel engines are equipped with a glow plug to aid starting. It is a heating element that uses 12 volts from the battery to warm up the cylinder head near the injector tip.<\/p>\n\n\n\n<p>When a problem arises in the cylinder three glow plug circuit, on-board diagnostics (OBD) will log a P0673 code.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P0673 Code Mean?<\/h2>\n\n\n\n<p><a href=\"https:\/\/www.carparts.com\/blog\/search-obd2-codes-list\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Diagnostic trouble code\">Diagnostic trouble code<\/a> (DTC) P0673 stands for &ldquo;Cylinder 3 Glow Plug Circuit Open.&rdquo;<\/p>\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 typically controlled by the powertrain control module (PCM), which also monitors coolant and intake air temperature.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"602\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/02\/car-glow-plug-isolated-1024x602.jpg\" alt=\"car glow plug isolated\" class=\"wp-image-66657\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/02\/car-glow-plug-isolated-1024x602.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/02\/car-glow-plug-isolated-300x176.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/02\/car-glow-plug-isolated-768x452.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/02\/car-glow-plug-isolated-1536x904.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/02\/car-glow-plug-isolated-150x88.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/02\/car-glow-plug-isolated.jpg 1700w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">Glow plugs are typically controlled by the powertrain control module (PCM), which also monitors coolant and intake air temperature.<\/figcaption><\/figure>\n\n\n\n<p>If the <a href=\"https:\/\/www.carparts.com\/engine-control-module\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"PCM\">PCM<\/a> detects that the engine is cold via such sensors, it activates the glow plug to assist starting. As the temperature of the glow plug increases, the heating element inside also increases. This reduces the current in amperes needed by the glow plugs to function effectively.<\/p>\n\n\n\n<p>Once the PCM receives a message from the Glow Plug Control module indicating that the glow plug is unable to heat up, it will log a code P0673. Typically, it&rsquo;s a simple resistance or current flow test that flags the faulty glow plug or circuit.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Note About Glow Plugs<\/h3>\n\n\n\n<p>Each glow plug typically uses 20-25 amps when first energized and as the glow plug heats up, the current drops to 10-15 amps. Glow plugs pull enough current that heavy circuits and switching devices are used to power them up.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"641\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/02\/an-energized-car-glow-plug-1024x641.jpg\" alt=\"an energized car glow plug\" class=\"wp-image-81075\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/02\/an-energized-car-glow-plug-1024x641.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/02\/an-energized-car-glow-plug-300x188.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/02\/an-energized-car-glow-plug-768x480.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/02\/an-energized-car-glow-plug-1536x961.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/02\/an-energized-car-glow-plug-150x94.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/02\/an-energized-car-glow-plug.jpg 1600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">An energized glow plug producing heat in a bench test. | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<p>Glow plug control modules will measure the resistance of each glow plug separately, but older non-California diesels didn&rsquo;t have this feature. Most light truck diesels have a glow plug control module if they&rsquo;re equipped with glow plugs. Cummins diesel engines use an intake heater rather than glow plugs.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Glow plug control modules will measure the resistance of each glow plug separately, but older non-California diesels didn&rsquo;t have this feature. Most light truck diesels have a glow plug control module if they&rsquo;re equipped with glow plugs.<\/p>\n<cite><em>&ndash;&nbsp;<\/em><a href=\"https:\/\/www.carparts.com\/blog\/author\/richardmccuistian\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Richard McCuistian, ASE Certified Master Automobile Technician\">Richard McCuistian, ASE Certified Master Automobile Technician<\/a><\/cite><\/blockquote>\n\n\n\n<p><em><strong>Note:<\/strong> The definition of code P0673 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 P0673 Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<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><\/li>\n\n\n\n<li>Glow plug control module failure<\/li>\n\n\n\n<li><a href=\"https:\/\/www.carparts.com\/glow-plug-wiring-harness\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Glow plug wiring harness\">Glow plug wiring harness<\/a> failure<\/li>\n\n\n\n<li>Damaged <a href=\"https:\/\/www.carparts.com\/blog\/car-wiring\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"wiring\">wiring<\/a> connector<\/li>\n\n\n\n<li>Open or shorted glow plug circuit<\/li>\n<\/ul>\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<h2 class=\"wp-block-heading\">What are the Common Symptoms of the P0673 Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<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>\n\n\n\n<li><a href=\"https:\/\/www.carparts.com\/blog\/my-car-wont-start-what-should-i-do\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"No start or hard start condition\">No start or hard start condition<\/a><\/li>\n\n\n\n<li>Preheat light doesn&rsquo;t go off<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P0673 Code<\/h2>\n\n\n\n<p>DTC P0673 is a generic trouble code that can be logged in various makes and models. However, keep in mind that the exhibited symptoms and steps for diagnosis and repair can vary from one vehicle to another.<\/p>\n\n\n\n<p>If you&rsquo;re not familiar with the process of diagnosing trouble codes by yourself, it&rsquo;s a good idea to bring your vehicle to a certified mechanic. But if you know how to work your way around diagnosing trouble codes, then you can go ahead and do it yourself.<\/p>\n\n\n\n<p>To help you out, here is a video that shows you what the process might involve:<\/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?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 P0673 Code<\/h2>\n\n\n\n<p>Attempting to fix a P0673 code can be frustrating and confusing if you&rsquo;re not a seasoned DIYer. Consider bringing your vehicle to a certified mechanic to ensure that the necessary steps and protocol for diagnosis and repair are followed.<\/p>\n\n\n\n<p>Otherwise, if you think you have the right tools and know-how to do the job on your own, make sure you have the <a href=\"https:\/\/www.carparts.com\/blog\/why-you-should-always-consult-a-repair-manual\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"right repair manuals\">right repair manuals<\/a> before proceeding. Guides like those from Chilton or an ALLDATA subscription contain vehicle-specific repair information, so you might want to check those out.<\/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>When a diesel engine is cold, the air temperature that&rsquo;s produced as the piston rises and compresses the air is&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p0673-code-cylinder-3-glow-plug-circuit-open\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":66658,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":true,"_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":[2607,2985],"class_list":{"0":"post-66656","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>P0673 Code: Cylinder 3 Glow Plug Circuit Open - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Find out what the code P0673 means, its most common symptoms and causes, and what to do if your scanner registers it.\" \/>\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\/p0673-code-cylinder-3-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=\"P0673 Code: Cylinder 3 Glow Plug Circuit Open - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Find out what the code P0673 means, its most common symptoms and causes, and what to do if your scanner registers it.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/p0673-code-cylinder-3-glow-plug-circuit-open\/\" \/>\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=\"2022-02-09T08:20:58+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-12-18T02:07:09+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/02\/car-replacement-glow-plug-in-dark-background.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\\\/p0673-code-cylinder-3-glow-plug-circuit-open\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0673-code-cylinder-3-glow-plug-circuit-open\\\/\"},\"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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