{"id":81575,"date":"2023-03-03T02:32:35","date_gmt":"2023-03-03T10:32:35","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=81575"},"modified":"2024-12-17T18:58:11","modified_gmt":"2024-12-18T02:58:11","slug":"signs-of-a-faulty-cylinder-head-temperature-sensor","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/signs-of-a-faulty-cylinder-head-temperature-sensor\/","title":{"rendered":"Signs of a Faulty Cylinder Head Temperature Sensor"},"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-column81575_2b4152-37 > .kt-inside-inner-col,.kadence-column81575_2b4152-37 > .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-column81575_2b4152-37 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column81575_2b4152-37 > .kt-inside-inner-col{flex-direction:column;}.kadence-column81575_2b4152-37 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column81575_2b4152-37 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column81575_2b4152-37{position:relative;}@media all and (max-width: 1024px){.kadence-column81575_2b4152-37 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column81575_2b4152-37 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column81575_2b4152-37 inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-322167  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-0c497e\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading81575_3bd7b9-b0, .wp-block-kadence-advancedheading.kt-adv-heading81575_3bd7b9-b0[data-kb-block=\"kb-adv-heading81575_3bd7b9-b0\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading81575_3bd7b9-b0 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading81575_3bd7b9-b0[data-kb-block=\"kb-adv-heading81575_3bd7b9-b0\"] 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-heading81575_3bd7b9-b0 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading81575_3bd7b9-b0[data-kb-block=\"kb-adv-heading81575_3bd7b9-b0\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading81575_3bd7b9-b0 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading81575_3bd7b9-b0\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The PCM relies on the cylinder head temperature sensor&rsquo;s readings to determine the proper ignition timing and air-fuel ratio.<\/li>\n\n\n\n<li>The readings are also used to determine whether the engine is overheating.<\/li>\n\n\n\n<li>Common indicators of a cylinder head temperature sensor malfunction include an illuminated check engine light, decreased engine performance, and a long crank time.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p class=\"wp-block-paragraph\">The<a href=\"https:\/\/www.carparts.com\/cylinder-head-temperature-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"cylinder head temperature sensor\">cylinder head temperature sensor<\/a> measures the temperature of the cylinder head, the top half of the engine block where the valves are mounted. The cylinder head temperature sensor is a negative temperature coefficient (NTC) thermistor that uses changes in electrical resistance to determine temperature. The voltage from the cylinder head temperature sensor decreases as the temperature increases.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why Is the Cylinder Head Temperature Sensor Important?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Information from the cylinder head temperature sensor is sent to your vehicle&rsquo;s powertrain control module (PCM), which helps the engine run smoothly and efficiently. The PCM changes the ignition timing and air-fuel ratio based on the engine&rsquo;s temperature. The cylinder head temperature sensor also allows the PCM to monitor the engine and determine if it&rsquo;s <a href=\"https:\/\/www.carparts.com\/blog\/what-damage-to-expect-from-an-overheating-car\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"overheating\">overheating<\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/03\/automotive-cylinder-head-temperature-sensor-1024x683.jpg\" alt=\"image of an automotive cylinder head temperature sensor\" class=\"wp-image-81600\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/03\/automotive-cylinder-head-temperature-sensor-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/03\/automotive-cylinder-head-temperature-sensor-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/03\/automotive-cylinder-head-temperature-sensor-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/03\/automotive-cylinder-head-temperature-sensor-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/03\/automotive-cylinder-head-temperature-sensor-1200x800.jpg 1200w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/03\/automotive-cylinder-head-temperature-sensor-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/03\/automotive-cylinder-head-temperature-sensor.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">The cylinder head temperature sensor measures the temperature of the cylinder head, which helps the engine run smoothly and efficiently.<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The cylinder head temperature sensor has an advantage over other engine temperature sensors because the cylinder head temperature sensor takes readings directly from the metal of the <a href=\"https:\/\/www.carparts.com\/cylinder-head\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"cylinder head\">cylinder head<\/a>. As a result, it can give the PCM a more accurate reading of the engine block&rsquo;s current temperature. Other sensors such as the <a href=\"https:\/\/www.carparts.com\/blog\/engine-coolant-temperature-sensor-purpose-location-and-failure-signs\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"engine coolant temperature sensor\">engine coolant temperature sensor<\/a> or intake air temperature sensor only provide temperature information from their respective parts.<\/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<h3 class=\"wp-block-heading\">Cylinder Head Temperature Sensors on Ford Vehicles<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The hottest part of the combustion chamber on an internal combustion engine is the cylinder head. In the 1990s, Ford started using cylinder head temperature sensors to keep track of engine overheating concerns.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Most manufacturers don&rsquo;t use cylinder head temperature sensors. Ford&rsquo;s Triton system on many of its V8 engines includes this sensor; when the engine is overheating, the PCM will do its best to prevent damage from overheating by killing every other cylinder so that it is pumping air rather than having combustion events, and every so often, it will alternate to the other cylinders. A diagnostic code will be set when this happens.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Fords also have a regular engine coolant temperature sensor, so the CHT sensor isn&rsquo;t the only input regarding engine temperature.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The cylinder head temperature sensor on Ford V8s is typically on the front inside of the driver side cylinder head. The ECT sensor that measures engine coolant temperature is in the coolant passage at the front of the intake manifold near the thermostat.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Symptoms of a Faulty Cylinder Head Temperature Sensor<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A faulty cylinder head temperature sensor can impair the engine&rsquo;s performance and efficiency. Watch out for the following symptoms:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Illuminated Check Engine Light<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Whenever the PCM detects a faulty sensor, it will store a diagnostic code and trigger the check engine light.&nbsp; Keep in mind that many other issues can trigger a <a href=\"https:\/\/www.carparts.com\/blog\/check-engine-light-flashing\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"check engine light\">check engine light<\/a>, so make sure to use a scan tool to determine the issue&rsquo;s root cause.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Decreased Engine Performance<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The PCM needs an optimal engine temperature in order to keep the engine running smoothly. But a faulty cylinder head temperature sensor can lead to less power and fuel economy.&nbsp; If the PCM doesn&rsquo;t receive temperature information from the cylinder head, it might be unable to set the ideal ignition timing or <a href=\"https:\/\/www.carparts.com\/blog\/what-is-a-good-air-fuel-ratio-chart-included\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"air-fuel ratio\">air-fuel ratio<\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/03\/starting-a-car-1024x683.jpg\" alt=\"driver trying to start a car\" class=\"wp-image-81601\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/03\/starting-a-car-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/03\/starting-a-car-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/03\/starting-a-car-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/03\/starting-a-car-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/03\/starting-a-car-1200x800.jpg 1200w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/03\/starting-a-car-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/03\/starting-a-car.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">A bad cylinder head temperature sensor can affect the engine startup process, causing the engine to take longer to start.<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Engine Cranks Longer Before Starting<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The startup process typically involves pumping fuel into the cylinders, cranking the engine, and igniting the fuel. However, a bad cylinder head temperature sensor can affect this process, causing the engine to take longer to start.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The cylinder head temperature sensor might be a small component, but it&rsquo;s a crucial sensor when it comes to controlling the engine. If you think your vehicle&rsquo;s cylinder head temperature sensor is malfunctioning, ask a trusted mechanic to take a look.<\/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>Thecylinder head temperature sensor measures the temperature of the cylinder head, the top half of the engine block where the&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/signs-of-a-faulty-cylinder-head-temperature-sensor\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":81599,"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":[52,3747],"tags":[3717],"ppma_author":[2607,2985],"class_list":["post-81575","post","type-post","status-publish","format-standard","has-post-thumbnail","category-diy","category-engine","tag-cylinder-head-temperature-sensor","entry"],"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Signs of a Faulty Cylinder Head Temperature Sensor - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"A faulty cylinder head temperature sensor can show several engine-related symptoms. 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