{"id":67474,"date":"2022-03-08T02:47:47","date_gmt":"2022-03-08T10:47:47","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=67474"},"modified":"2024-06-12T19:41:49","modified_gmt":"2024-06-13T02:41:49","slug":"p0599-code-thermostat-heater-control-circuit-high","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p0599-code-thermostat-heater-control-circuit-high\/","title":{"rendered":"P0599 Code: Thermostat Heater Control Circuit High"},"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_8a026b-c6 > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_8a026b-c6 > .kt-inside-inner-col,.kadence-column_8a026b-c6 > .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_8a026b-c6 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_8a026b-c6 > .kt-inside-inner-col{flex-direction:column;}.kadence-column_8a026b-c6 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_8a026b-c6 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_8a026b-c6{position:relative;}@media all and (max-width: 1024px){.kadence-column_8a026b-c6 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_8a026b-c6 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_8a026b-c6 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-7e6541  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-5b147c\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_e4fba5-f8, .wp-block-kadence-advancedheading.kt-adv-heading_e4fba5-f8[data-kb-block=\"kb-adv-heading_e4fba5-f8\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_e4fba5-f8 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_e4fba5-f8[data-kb-block=\"kb-adv-heading_e4fba5-f8\"] 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_e4fba5-f8 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_e4fba5-f8[data-kb-block=\"kb-adv-heading_e4fba5-f8\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_e4fba5-f8 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_e4fba5-f8\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>Diagnostic trouble code (DTC) P0599 stands for &ldquo;Thermostat Heater Control Circuit High.&rdquo; This code is triggered when the powertrain control module (PCM) detects an incorrect signal from the thermostat.<\/li><li>The P0599 code is caused by wiring or connector problems, thermostat failure, coolant leaks, or PCM failure.<\/li><li>Common symptoms of the P0599 code include an illuminated check engine light, inconsistent cooling fan operation, and inconsistent temperature readings.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Code P0599 is one of many trouble codes that can be logged and retrieved from the OBD system. Read on to understand what this code can mean for your vehicle.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P0599 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) P0599 stands for &ldquo;Thermostat Heater Control Circuit High.&rdquo; This code is logged when the powertrain control module (PCM) detects an incorrect signal from the thermostat.<\/p>\n\n\n\n<p>Some vehicles with newer engines can utilize thermostats that are electronically controlled by the PCM. The electronically controlled thermostat consists of various temperature and load sensors, a computer program, and the control housing with a built-in thermostat.<\/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\/automotive-faulty-thermostat-part-being-inspected-1024x683.jpg\" alt=\"automotive faulty thermostat part being inspected\" class=\"wp-image-67484\" width=\"1024\" height=\"683\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/automotive-faulty-thermostat-part-being-inspected-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/automotive-faulty-thermostat-part-being-inspected-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/automotive-faulty-thermostat-part-being-inspected-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/automotive-faulty-thermostat-part-being-inspected-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/automotive-faulty-thermostat-part-being-inspected-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/automotive-faulty-thermostat-part-being-inspected.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>Code P0599 is logged when the PCM detects an incorrect signal from the thermostat.<\/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 an incorrect signal from the thermostat, then it might log code P0599. Code P0599 can also indicate a fault has occurred with the system where the control voltage is high.<\/p>\n\n\n\n<p>Depending on the severity of the problem, related error codes can also be stored with this DTC. Code P0599 is similar to error codes <a href=\"https:\/\/www.carparts.com\/blog\/p0597-code-thermostat-heater-control-circuit-open\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"P0597\">P0597<\/a> and P0598.<\/p>\n\n\n\n<p><em><strong>Note:<\/strong> The definition of code P0599 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 P0599 Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/www.carparts.com\/blog\/car-wiring\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Wiring\">Wiring<\/a> problem<\/li><li><a href=\"https:\/\/www.carparts.com\/thermostat\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Thermostat\">Thermostat<\/a> failure<\/li><li>Faulty connector on the thermostat<\/li><li><a href=\"https:\/\/www.carparts.com\/blog\/coolant-leak-symptoms-plus-faq\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Coolant leak\">Coolant leak<\/a><\/li><li>PCM failure<\/li><\/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 P0599 Code?<\/h2>\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=\"Active check engine light\">Active check engine light<\/a><\/li><li>Constantly operating <a href=\"https:\/\/www.carparts.com\/cooling-fan-assembly\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"cooling fans\">cooling fans<\/a><\/li><li>Inconsistent <a href=\"https:\/\/www.carparts.com\/temperature-gauge\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"temperature gauge\">temperature gauge<\/a> readings<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P0599 Code<\/h2>\n\n\n\n<p>The P0599 trouble code is a generic code that can be set across several makes and models. However, this does not mean there&rsquo;s a one-size-fits-all approach to diagnosing its underlying cause. The steps for troubleshooting this code will vary depending on your vehicle&rsquo;s make and model.<\/p>\n\n\n\n<p>Check out this video to get an idea of what the diagnostic process for this code 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=\"Chevy Sonic - P0599 Thermostat Heater Control Circuit High\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/x__iAadmU-A?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 P0599 Code<\/h2>\n\n\n\n<p>P0599 can share similar triggers and symptoms with other fault codes. However, that does not mean that they share repair steps as well. All vehicles are different, so make sure to refer to a factory repair guide that is specific to your car.<\/p>\n\n\n\n<p>If you&rsquo;re considering troubleshooting this code on your own, make sure to consult a vehicle-specific <a href=\"https:\/\/www.carparts.com\/blog\/why-you-should-always-consult-a-repair-manual\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"repair manual or an online repair database\">repair manual or an online repair database<\/a>. These resources contain the appropriate diagnostic and repair procedures for this code. Alternatively, you can leave the job to a professional.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Where to Get a New Thermostat to Clear DTC P0599&nbsp;<\/h2>\n\n\n\n<p>DTC P0599 is logged whenever the PCM detects a problem with the thermostat, specifically if there&rsquo;s an incorrect signal. Fortunately, if clearing it requires replacing the thermostat, you won&rsquo;t have any issues finding a new one at <a href=\"http:\/\/carparts.com\" target=\"_blank\" rel=\"noreferrer noopener nofollow\" aria-label=\"CarParts.com\">CarParts.com<\/a>.<\/p>\n\n\n\n<p>To start shopping, visit our website or download our mobile app. Use the vehicle selector and search filters to check out compatible thermostats that match your preferred brand, price, specs, and more. If you have questions, our team of customer service representatives will give you all the help you need to find what you&rsquo;re looking for.<\/p>\n\n\n\n<p>We source our <a href=\"https:\/\/www.carparts.com\/thermostat\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"thermostats\">thermostats<\/a> from the most trusted manufacturers in the industry for guaranteed fit and performance. In addition, our warehouses are strategically located across the US, meaning you can receive your order within a few days.<\/p>\n\n\n\n<p>Clear code P0599 in no time. Shop for a replacement thermostat today and take advantage of our unbeatable deals!<\/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>Code P0599 is one of many trouble codes that can be logged and retrieved from the OBD system. Read on&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p0599-code-thermostat-heater-control-circuit-high\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":67483,"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":[1063,1214,332],"ppma_author":[2607,2985],"class_list":{"0":"post-67474","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-cooling-fan-assembly","9":"tag-temperature-gauge","10":"tag-thermostat","11":"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>P0599 Code: Thermostat Heater Control Circuit High - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Does your vehicle have a logged P0599? Learn what this code means, its triggers, and the symptoms associated with it. Plus find out what to do.\" \/>\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\/p0599-code-thermostat-heater-control-circuit-high\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0599 Code: Thermostat Heater Control Circuit High - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Does your vehicle have a logged P0599? Learn what this code means, its triggers, and the symptoms associated with it. 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