{"id":79237,"date":"2025-07-06T18:25:03","date_gmt":"2025-07-06T23:25:03","guid":{"rendered":"https:\/\/www.emanualonline.com\/blog\/?p=79237"},"modified":"2025-07-06T18:25:03","modified_gmt":"2025-07-06T23:25:03","slug":"p2046-obd2-reductant-temperature-sensor-circuit-intermittent","status":"publish","type":"post","link":"https:\/\/www.emanualonline.com\/blog\/p2046-obd2-reductant-temperature-sensor-circuit-intermittent","title":{"rendered":"P2046 OBD2: Reductant Temperature Sensor Circuit Intermittent"},"content":{"rendered":"<p>The P2046 OBD-II code is associated with the Reductant Temperature Sensor Circuit Intermittent. This code indicates that the engine control module (ECM) has detected an inconsistent signal from the reductant temperature sensor, which is critical for the proper functioning of the diesel exhaust fluid (DEF) system.<\/p>\n<h2>What Does the P2046 Code Mean?<\/h2>\n<p>OBD-II Code P2046 is defined as a Reductant Temperature Sensor Circuit Intermittent. This code is triggered when the engine control module (PCM) receives an implausible signal from the reductant temperature sensor regarding the temperature of the DEF in the tank.<\/p>\n<h2>What Causes the P2046 Code?<\/h2>\n<p>The primary cause of the P2046 code is often an issue with the Reductant Temperature Sensor itself. Additionally, other factors that can trigger this code include:<\/p>\n<ul>\n<li>Damaged DEF tank<\/li>\n<li>Wiring issues or poor connections in the sensor circuit<\/li>\n<li>Faulty engine control module (PCM)<\/li>\n<li>Contaminated or low levels of Diesel Exhaust Fluid (DEF)<\/li>\n<\/ul>\n<h2>What Are the Symptoms of the P2046 Code?<\/h2>\n<p>Symptoms associated with the P2046 code may include:<\/p>\n<ul>\n<li>Check Engine Light illuminated<\/li>\n<li>Reduced engine performance<\/li>\n<li>Increased emissions<\/li>\n<li>Possible difficulty in starting the engine<\/li>\n<\/ul>\n<h2>How Serious Is the P2046 Code?<\/h2>\n<p>The P2046 code is considered urgent. If left unaddressed, it can lead to severe damage to the vehicle&#8217;s exhaust system and adversely affect driving safety. Immediate action is recommended to prevent further complications.<\/p>\n<h2>How to Diagnose the P2046 Code<\/h2>\n<p>Diagnosing the P2046 code typically involves the following steps:<\/p>\n<ol>\n<li>Use an OBD-II scanner to confirm the presence of the P2046 code and check for any additional trouble codes.<\/li>\n<li>Inspect the wiring and connectors of the Reductant Temperature Sensor for any signs of damage or corrosion.<\/li>\n<li>Test the sensor&#8217;s operation using a multimeter to ensure it is functioning within specified parameters.<\/li>\n<li>Check the DEF levels and quality to ensure they meet the manufacturer&#8217;s specifications.<\/li>\n<li>Evaluate the PCM for any faults if the sensor and wiring are in good condition.<\/li>\n<\/ol>\n<h2>Common Repairs for the P2046 Code<\/h2>\n<p>Common repairs for the P2046 code may include:<\/p>\n<ul>\n<li>Replacing the Reductant Temperature Sensor<\/li>\n<li>Repairing or replacing damaged wiring or connectors<\/li>\n<li>Replacing the DEF tank if damaged<\/li>\n<li>Reprogramming or replacing the PCM if necessary<\/li>\n<\/ul>\n<h2>How Much Does It Cost to Fix the P2046 Code?<\/h2>\n<p>The cost to fix the P2046 code can vary widely depending on the root cause of the issue. On average, repairs may range from $100 to $800, depending on whether a simple sensor replacement is needed or if more extensive repairs are required.<\/p>\n<h2>Can I Fix the P2046 Code Myself?<\/h2>\n<p>While some DIY enthusiasts may be able to tackle this issue, proper diagnosis is crucial to ensure that the correct repairs are made. If you have experience with automotive repairs and access to the necessary tools, you may be able to replace the sensor or repair wiring issues. However, for peace of mind and to avoid potential complications, seeking professional assistance is recommended.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The P2046 OBD-II code is associated with the Reductant Temperature Sensor Circuit Intermittent. This code indicates that the engine control module (ECM) has detected an inconsistent signal from the reductant temperature sensor, which is critical for the proper functioning of the diesel exhaust fluid (DEF) system. What Does the P2046 Code Mean? OBD-II Code P2046 &hellip;<\/p>\n","protected":false},"author":26,"featured_media":89530,"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-79237","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 P2046 \u2013 Causes, Symptoms, and Repairs<\/title>\n<meta name=\"description\" content=\"Learn all about the P2046 code, what causes reductant temperature sensor circuit intermittent, and how to diagnose and fix common issues 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\/p2046-obd2-reductant-temperature-sensor-circuit-intermittent\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P2046 OBD2: Reductant Temperature Sensor Circuit Intermittent\" \/>\n<meta property=\"og:description\" content=\"The P2046 OBD-II code is associated with the Reductant Temperature Sensor Circuit Intermittent. This code indicates that the engine control module (ECM)\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.emanualonline.com\/blog\/p2046-obd2-reductant-temperature-sensor-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=\"2025-07-06T23:25:03+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/07\/p2046-obd2-reductant-temperature-sensor-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\" 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He's been a certified Master Mechanic for 15 years, working for various car dealers and specialized repair shops before turning towards blogging about cars and EVs in the hope of helping the next generation of automotive technicians. 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\/07\/p2046-obd2-reductant-temperature-sensor-circuit-intermittent.png",1200,675,false],"thumbnail":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/07\/p2046-obd2-reductant-temperature-sensor-circuit-intermittent-150x150.png",150,150,true],"medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/07\/p2046-obd2-reductant-temperature-sensor-circuit-intermittent-300x169.png",300,169,true],"medium_large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/07\/p2046-obd2-reductant-temperature-sensor-circuit-intermittent-768x432.png",618,348,true],"large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/07\/p2046-obd2-reductant-temperature-sensor-circuit-intermittent-1024x576.png",618,348,true],"1536x1536":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/07\/p2046-obd2-reductant-temperature-sensor-circuit-intermittent.png",1200,675,false],"2048x2048":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/07\/p2046-obd2-reductant-temperature-sensor-circuit-intermittent.png",1200,675,false],"tie-small":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/07\/p2046-obd2-reductant-temperature-sensor-circuit-intermittent-110x75.png",110,75,true],"tie-medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/07\/p2046-obd2-reductant-temperature-sensor-circuit-intermittent-403x215.png",403,215,true],"tie-large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/07\/p2046-obd2-reductant-temperature-sensor-circuit-intermittent-310x205.png",310,205,true],"slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/07\/p2046-obd2-reductant-temperature-sensor-circuit-intermittent-660x330.png",660,330,true],"big-slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/07\/p2046-obd2-reductant-temperature-sensor-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 P2046 OBD-II code is associated with the Reductant Temperature Sensor Circuit Intermittent. This code indicates that the engine control module (ECM) has detected an inconsistent signal from the reductant temperature sensor, which is critical for the proper functioning of the diesel exhaust fluid (DEF) system. What Does the P2046 Code Mean? OBD-II Code P2046&hellip;","_links":{"self":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/79237","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=79237"}],"version-history":[{"count":1,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/79237\/revisions"}],"predecessor-version":[{"id":85936,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/79237\/revisions\/85936"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media\/89530"}],"wp:attachment":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media?parent=79237"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/categories?post=79237"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/tags?post=79237"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}