{"id":79951,"date":"2025-05-28T11:21:16","date_gmt":"2025-05-28T16:21:16","guid":{"rendered":"https:\/\/www.emanualonline.com\/blog\/?p=79951"},"modified":"2025-06-04T04:26:22","modified_gmt":"2025-06-04T09:26:22","slug":"p2574-obd2-direct-ozone-reduction-catalyst-deterioration-sensor-circuit-low","status":"publish","type":"post","link":"https:\/\/www.emanualonline.com\/blog\/p2574-obd2-direct-ozone-reduction-catalyst-deterioration-sensor-circuit-low","title":{"rendered":"P2574 OBD2: Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Low"},"content":{"rendered":"<h2>What Does the P2574 Code Mean?<\/h2>\n<p>The P2574 code indicates that the Direct Ozone Reduction Catalyst Deterioration Sensor Circuit is functioning at a low level. This code is part of the OBD-II system, which monitors various sensors and components in your vehicle&#8217;s engine to ensure optimal performance and emissions control.<\/p>\n<h2>What Causes the P2574 Code?<\/h2>\n<p>This code is often triggered by issues related to the Environmental Air Catalyst (EAC) sensor, which is hardwired to the vehicle&#8217;s radiator. The following factors can lead to the P2574 code:<\/p>\n<ul>\n<li>Failure of the EAC sensor, which is a crucial part of the radiator assembly.<\/li>\n<li>Installation of an aftermarket radiator that does not meet the manufacturer&#8217;s specifications.<\/li>\n<li>Improper coding of the EAC sensor to the powertrain control module (PCM).<\/li>\n<\/ul>\n<h2>What Are the Symptoms of the P2574 Code?<\/h2>\n<p>Symptoms of the P2574 code can include:<\/p>\n<ul>\n<li>Check Engine Light illuminated on the dashboard.<\/li>\n<li>Reduced engine performance and efficiency.<\/li>\n<li>Increased emissions output, potentially leading to failed emissions tests.<\/li>\n<\/ul>\n<h2>How Serious Is the P2574 Code?<\/h2>\n<p>The P2574 code is classified as urgent, indicating that immediate action is necessary. Ignoring this code can lead to severe damage to the vehicle&#8217;s emissions system or compromise the safety of the driver and passengers.<\/p>\n<h2>How to Diagnose the P2574 Code<\/h2>\n<p>To diagnose the P2574 code, follow these steps:<\/p>\n<ol>\n<li>Use an OBD-II scanner to retrieve the code and any related codes.<\/li>\n<li>Inspect the EAC sensor and its wiring for signs of damage or disconnection.<\/li>\n<li>Check the radiator for proper specifications and ensure it is an OE part.<\/li>\n<li>Verify the coding of the EAC sensor to the PCM.<\/li>\n<\/ol>\n<h2>Common Repairs for the P2574 Code<\/h2>\n<p>Common repairs may include:<\/p>\n<ul>\n<li>Replacing the faulty EAC sensor.<\/li>\n<li>Installing a new OE radiator and ensuring it is correctly coded to the PCM.<\/li>\n<li>Repairing or replacing damaged wiring or connectors associated with the EAC sensor.<\/li>\n<\/ul>\n<h2>How Much Does It Cost to Fix the P2574 Code?<\/h2>\n<p>The cost to fix the P2574 code can vary significantly based on the specific repairs needed. Generally, you may expect to pay anywhere from $200 to $1,200, depending on whether you need to replace the EAC sensor, the radiator, or both.<\/p>\n<h2>Can I Fix the P2574 Code Myself?<\/h2>\n<p>While some DIY enthusiasts may be able to replace the EAC sensor, diagnosing the issue and ensuring proper coding to the PCM often requires professional expertise. If you&#8217;re unfamiliar with vehicle electronics and diagnostics, it is advisable to seek professional help to avoid further complications.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What Does the P2574 Code Mean? The P2574 code indicates that the Direct Ozone Reduction Catalyst Deterioration Sensor Circuit is functioning at a low level. This code is part of the OBD-II system, which monitors various sensors and components in your vehicle&#8217;s engine to ensure optimal performance and emissions control. What Causes the P2574 Code? &hellip;<\/p>\n","protected":false},"author":26,"featured_media":82912,"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-79951","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 P2574 \u2013 Causes, Symptoms, and Repairs<\/title>\n<meta name=\"description\" content=\"Learn all about the P2574 code, what causes direct ozone reduction catalyst deterioration sensor circuit low, 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\/p2574-obd2-direct-ozone-reduction-catalyst-deterioration-sensor-circuit-low\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P2574 OBD2: Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Low\" \/>\n<meta property=\"og:description\" content=\"What Does the P2574 Code Mean? 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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\/05\/p2574-obd2-direct-ozone-reduction-catalyst-deterioration-sensor-circuit-low.png",1200,675,false],"thumbnail":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2574-obd2-direct-ozone-reduction-catalyst-deterioration-sensor-circuit-low-150x150.png",150,150,true],"medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2574-obd2-direct-ozone-reduction-catalyst-deterioration-sensor-circuit-low-300x169.png",300,169,true],"medium_large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2574-obd2-direct-ozone-reduction-catalyst-deterioration-sensor-circuit-low-768x432.png",618,348,true],"large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2574-obd2-direct-ozone-reduction-catalyst-deterioration-sensor-circuit-low-1024x576.png",618,348,true],"1536x1536":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2574-obd2-direct-ozone-reduction-catalyst-deterioration-sensor-circuit-low.png",1200,675,false],"2048x2048":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2574-obd2-direct-ozone-reduction-catalyst-deterioration-sensor-circuit-low.png",1200,675,false],"tie-small":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2574-obd2-direct-ozone-reduction-catalyst-deterioration-sensor-circuit-low-110x75.png",110,75,true],"tie-medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2574-obd2-direct-ozone-reduction-catalyst-deterioration-sensor-circuit-low-403x215.png",403,215,true],"tie-large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2574-obd2-direct-ozone-reduction-catalyst-deterioration-sensor-circuit-low-310x205.png",310,205,true],"slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2574-obd2-direct-ozone-reduction-catalyst-deterioration-sensor-circuit-low-660x330.png",660,330,true],"big-slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2574-obd2-direct-ozone-reduction-catalyst-deterioration-sensor-circuit-low-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":"What Does the P2574 Code Mean? The P2574 code indicates that the Direct Ozone Reduction Catalyst Deterioration Sensor Circuit is functioning at a low level. This code is part of the OBD-II system, which monitors various sensors and components in your vehicle&#8217;s engine to ensure optimal performance and emissions control. What Causes the P2574 Code?&hellip;","_links":{"self":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/79951","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=79951"}],"version-history":[{"count":1,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/79951\/revisions"}],"predecessor-version":[{"id":82873,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/79951\/revisions\/82873"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media\/82912"}],"wp:attachment":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media?parent=79951"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/categories?post=79951"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/tags?post=79951"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}