{"id":76943,"date":"2025-09-17T13:47:04","date_gmt":"2025-09-17T18:47:04","guid":{"rendered":"https:\/\/www.emanualonline.com\/blog\/?p=76943"},"modified":"2025-09-17T13:47:04","modified_gmt":"2025-09-17T18:47:04","slug":"p0119-obd2-engine-coolant-temperature-sensor-1-circuit-intermittent","status":"publish","type":"post","link":"https:\/\/www.emanualonline.com\/blog\/p0119-obd2-engine-coolant-temperature-sensor-1-circuit-intermittent","title":{"rendered":"P0119 OBD2: Engine Coolant Temperature Sensor 1 Circuit Intermittent"},"content":{"rendered":"<p>The P0119 code is a diagnostic trouble code (DTC) that indicates an issue with the Engine Coolant Temperature (ECT) Sensor circuit. This sensor plays a crucial role in monitoring the temperature of the coolant within the engine, which is vital for optimal engine performance.<\/p>\n<h2>What Does the P0119 Code Mean?<\/h2>\n<p>OBD-II Code P0119 is defined as an Engine Coolant Temperature Circuit Intermittent. It means that the engine control module (PCM) has detected an intermittent voltage input from the ECT sensor circuit, which can lead to improper engine management.<\/p>\n<h2>What Causes the P0119 Code?<\/h2>\n<p>The causes for the P0119 code can include:<\/p>\n<ul>\n<li>Defective Engine Coolant Temperature Sensor<\/li>\n<li>Rusty and\/or corroded engine coolant<\/li>\n<li>Plugged or restricted cooling system<\/li>\n<li>Faulty or corroded wiring or connections related to the ECT sensor<\/li>\n<\/ul>\n<h2>What Are the Symptoms of the P0119 Code?<\/h2>\n<p>Common symptoms associated with the P0119 code include:<\/p>\n<ul>\n<li>Check Engine Light illumination<\/li>\n<li>In some cases, no noticeable symptoms may be present<\/li>\n<li>Engine may exhibit hard starting or poor fuel economy<\/li>\n<\/ul>\n<h2>How Serious Is the P0119 Code?<\/h2>\n<p>The P0119 code is considered urgent, as it indicates a significant malfunction that can lead to severe engine damage or negatively affect vehicle safety. Immediate action is advised to prevent potential overheating or other engine issues.<\/p>\n<h2>How to Diagnose the P0119 Code<\/h2>\n<p>Diagnosing a P0119 code involves several steps:<\/p>\n<ol>\n<li>Record freeze frame information when the code is triggered.<\/li>\n<li>Perform a test drive while monitoring engine load, throttle position, RPM, and road speed using a data streaming scan tool.<\/li>\n<li>Compare the coolant temperature sensor values with the expected parameters.<\/li>\n<li>Check the ECT sensor connector for a steady 5-volt reference voltage and a good ground.<\/li>\n<li>Consider using a heat gun to test the ECT sensor\u2019s response to temperature changes.<\/li>\n<\/ol>\n<h2>Common Repairs for the P0119 Code<\/h2>\n<p>Common repairs for the P0119 code may include:<\/p>\n<ul>\n<li>Replacing a defective Engine Coolant Temperature Sensor<\/li>\n<li>Flushing the cooling system if rust or corrosion is found<\/li>\n<li>Repairing or replacing faulty wiring or connections<\/li>\n<li>Addressing issues within the cooling system or fans<\/li>\n<\/ul>\n<h2>How Much Does It Cost to Fix the P0119 Code?<\/h2>\n<p>The cost to fix the P0119 code can vary widely depending on the specific issue. Sensor replacement may cost between $100 to $300, while more extensive repairs involving the cooling system or wiring could be higher, ranging from $300 to $800.<\/p>\n<h2>Can I Fix the P0119 Code Myself?<\/h2>\n<p>If you have automotive experience and the right tools, you may be able to diagnose and repair the P0119 code yourself. However, keep in mind that diagnosing a trouble code accurately is crucial, as misdiagnosis can lead to unnecessary repairs. If you&#8217;re unsure, seeking professional assistance is recommended.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The P0119 code is a diagnostic trouble code (DTC) that indicates an issue with the Engine Coolant Temperature (ECT) Sensor circuit. This sensor plays a crucial role in monitoring the temperature of the coolant within the engine, which is vital for optimal engine performance. What Does the P0119 Code Mean? OBD-II Code P0119 is defined &hellip;<\/p>\n","protected":false},"author":26,"featured_media":96990,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_uag_custom_page_level_css":"","footnotes":""},"categories":[11987],"tags":[],"class_list":["post-76943","post","type-post","status-publish","format-standard","has-post-thumbnail","","category-p-obd2-codes-powertrain"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.6 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>OBD2 Code P0119 \u2013 Causes, Symptoms, and Repairs<\/title>\n<meta name=\"description\" content=\"Learn all about the P0119 code, what causes engine coolant temperature sensor circuit intermittent issues, and how to diagnose and fix common problems to maintain optimal engine performance.\" \/>\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.emanualonline.com\/blog\/p0119-obd2-engine-coolant-temperature-sensor-1-circuit-intermittent\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0119 OBD2: Engine Coolant Temperature Sensor 1 Circuit Intermittent\" \/>\n<meta property=\"og:description\" content=\"The P0119 code is a diagnostic trouble code (DTC) that indicates an issue with the Engine Coolant Temperature (ECT) Sensor circuit. This sensor plays a\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.emanualonline.com\/blog\/p0119-obd2-engine-coolant-temperature-sensor-1-circuit-intermittent\" \/>\n<meta property=\"og:site_name\" content=\"eManualOnline Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/EmanualOnline\/\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/jee514\" \/>\n<meta property=\"article:published_time\" content=\"2025-09-17T18:47:04+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0119-obd2-engine-coolant-temperature-sensor-1-circuit-intermittent.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"675\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"JC Landry\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta 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He also loves cats, Johnny Cash and Subarus.","sameAs":["https:\/\/www.facebook.com\/jee514","https:\/\/www.instagram.com\/rat_in_chief\/","https:\/\/www.linkedin.com\/in\/jean-claude-landry-857781186\/"],"url":"https:\/\/www.emanualonline.com\/blog\/author\/jclandry"}]}},"uagb_featured_image_src":{"full":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0119-obd2-engine-coolant-temperature-sensor-1-circuit-intermittent.png",1200,675,false],"thumbnail":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0119-obd2-engine-coolant-temperature-sensor-1-circuit-intermittent-150x150.png",150,150,true],"medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0119-obd2-engine-coolant-temperature-sensor-1-circuit-intermittent-300x169.png",300,169,true],"medium_large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0119-obd2-engine-coolant-temperature-sensor-1-circuit-intermittent-768x432.png",618,348,true],"large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0119-obd2-engine-coolant-temperature-sensor-1-circuit-intermittent-1024x576.png",618,348,true],"1536x1536":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0119-obd2-engine-coolant-temperature-sensor-1-circuit-intermittent.png",1200,675,false],"2048x2048":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0119-obd2-engine-coolant-temperature-sensor-1-circuit-intermittent.png",1200,675,false],"tie-small":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0119-obd2-engine-coolant-temperature-sensor-1-circuit-intermittent-110x75.png",110,75,true],"tie-medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0119-obd2-engine-coolant-temperature-sensor-1-circuit-intermittent-403x215.png",403,215,true],"tie-large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0119-obd2-engine-coolant-temperature-sensor-1-circuit-intermittent-310x205.png",310,205,true],"slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0119-obd2-engine-coolant-temperature-sensor-1-circuit-intermittent-660x330.png",660,330,true],"big-slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0119-obd2-engine-coolant-temperature-sensor-1-circuit-intermittent-1050x525.png",1050,525,true]},"uagb_author_info":{"display_name":"JC Landry","author_link":"https:\/\/www.emanualonline.com\/blog\/author\/jclandry"},"uagb_comment_info":0,"uagb_excerpt":"The P0119 code is a diagnostic trouble code (DTC) that indicates an issue with the Engine Coolant Temperature (ECT) Sensor circuit. This sensor plays a crucial role in monitoring the temperature of the coolant within the engine, which is vital for optimal engine performance. What Does the P0119 Code Mean? OBD-II Code P0119 is defined&hellip;","_links":{"self":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/76943","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/users\/26"}],"replies":[{"embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/comments?post=76943"}],"version-history":[{"count":1,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/76943\/revisions"}],"predecessor-version":[{"id":83642,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/76943\/revisions\/83642"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media\/96990"}],"wp:attachment":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media?parent=76943"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/categories?post=76943"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/tags?post=76943"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}