{"id":77686,"date":"2025-08-31T15:03:24","date_gmt":"2025-08-31T20:03:24","guid":{"rendered":"https:\/\/www.emanualonline.com\/blog\/?p=77686"},"modified":"2025-08-31T15:03:24","modified_gmt":"2025-08-31T20:03:24","slug":"p042e-obd2-exhaust-gas-recirculation-a-control-stuck-open","status":"publish","type":"post","link":"https:\/\/www.emanualonline.com\/blog\/p042e-obd2-exhaust-gas-recirculation-a-control-stuck-open","title":{"rendered":"P042E OBD2: Exhaust Gas Recirculation &#8220;A&#8221; Control Stuck Open"},"content":{"rendered":"<h2>What Does the P042E Code Mean?<\/h2>\n<p>The P042E OBD-II code indicates that there is an issue with the Exhaust Gas Recirculation (EGR) system. Specifically, it means that the EGR &#8220;A&#8221; control is stuck open, which can lead to a range of performance issues.<\/p>\n<h2>What Causes the P042E Code?<\/h2>\n<p>The P042E code is typically triggered by a failure in the EGR system. The most common causes include:<\/p>\n<ul>\n<li>EGR valve failure<\/li>\n<li>Powertrain Control Module (PCM) failure<\/li>\n<li>Wiring issues related to the EGR system<\/li>\n<\/ul>\n<h2>What Are the Symptoms of the P042E Code?<\/h2>\n<p>When the P042E code is present, you may experience several symptoms, including:<\/p>\n<ul>\n<li>Decreased engine performance<\/li>\n<li>Increased fuel consumption<\/li>\n<\/ul>\n<h2>How Serious Is the P042E Code?<\/h2>\n<p>The P042E code is classified as a moderate severity issue. While it may not pose an immediate threat to your vehicle&#8217;s safety or functionality, it is important to address it in a timely manner to prevent further engine performance issues.<\/p>\n<h2>How to Diagnose the P042E Code<\/h2>\n<p>Diagnosing the P042E code involves using an OBD-II scanner to confirm the code and check for any additional trouble codes. A mechanic will also inspect the EGR system, including the EGR valve and related wiring, to identify the root cause of the problem.<\/p>\n<h2>Common Repairs for the P042E Code<\/h2>\n<p>Common repairs for the P042E code may include:<\/p>\n<ul>\n<li>Replacing the EGR valve<\/li>\n<li>Repairing or replacing faulty wiring<\/li>\n<li>Addressing PCM issues if necessary<\/li>\n<\/ul>\n<h2>How Much Does It Cost to Fix the P042E Code?<\/h2>\n<p>The cost to repair the P042E code can vary significantly based on the underlying issue. For instance, replacing an EGR valve can cost anywhere from $100 to $400, depending on the vehicle make and model.<\/p>\n<h2>Can I Fix the P042E Code Myself?<\/h2>\n<p>While some individuals with mechanical experience may be able to diagnose and replace the EGR valve themselves, it is generally recommended to seek professional help for proper diagnosis and repair. A certified mechanic has the necessary tools and expertise to ensure the issue is resolved correctly.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What Does the P042E Code Mean? The P042E OBD-II code indicates that there is an issue with the Exhaust Gas Recirculation (EGR) system. Specifically, it means that the EGR &#8220;A&#8221; control is stuck open, which can lead to a range of performance issues. What Causes the P042E Code? The P042E code is typically triggered by &hellip;<\/p>\n","protected":false},"author":26,"featured_media":94592,"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-77686","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 P042E \u2013 Causes, Symptoms, and Repairs<\/title>\n<meta name=\"description\" content=\"Learn all about the P042E code, what causes Exhaust Gas Recirculation &quot;A&quot; Control Stuck Open, 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\/p042e-obd2-exhaust-gas-recirculation-a-control-stuck-open\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P042E OBD2: Exhaust Gas Recirculation &quot;A&quot; Control Stuck Open\" \/>\n<meta property=\"og:description\" content=\"What Does the P042E Code Mean? The P042E OBD-II code indicates that there is an issue with the Exhaust Gas Recirculation (EGR) system. 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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\/08\/p042e-obd2-exhaust-gas-recirculation-a-control-stuck-open.png",1200,675,false],"thumbnail":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p042e-obd2-exhaust-gas-recirculation-a-control-stuck-open-150x150.png",150,150,true],"medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p042e-obd2-exhaust-gas-recirculation-a-control-stuck-open-300x169.png",300,169,true],"medium_large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p042e-obd2-exhaust-gas-recirculation-a-control-stuck-open-768x432.png",618,348,true],"large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p042e-obd2-exhaust-gas-recirculation-a-control-stuck-open-1024x576.png",618,348,true],"1536x1536":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p042e-obd2-exhaust-gas-recirculation-a-control-stuck-open.png",1200,675,false],"2048x2048":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p042e-obd2-exhaust-gas-recirculation-a-control-stuck-open.png",1200,675,false],"tie-small":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p042e-obd2-exhaust-gas-recirculation-a-control-stuck-open-110x75.png",110,75,true],"tie-medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p042e-obd2-exhaust-gas-recirculation-a-control-stuck-open-403x215.png",403,215,true],"tie-large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p042e-obd2-exhaust-gas-recirculation-a-control-stuck-open-310x205.png",310,205,true],"slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p042e-obd2-exhaust-gas-recirculation-a-control-stuck-open-660x330.png",660,330,true],"big-slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p042e-obd2-exhaust-gas-recirculation-a-control-stuck-open-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 P042E Code Mean? The P042E OBD-II code indicates that there is an issue with the Exhaust Gas Recirculation (EGR) system. Specifically, it means that the EGR &#8220;A&#8221; control is stuck open, which can lead to a range of performance issues. What Causes the P042E Code? 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