{"id":77893,"date":"2025-08-26T11:18:33","date_gmt":"2025-08-26T16:18:33","guid":{"rendered":"https:\/\/www.emanualonline.com\/blog\/?p=77893"},"modified":"2025-08-26T11:25:37","modified_gmt":"2025-08-26T16:25:37","slug":"p0581-obd2-cruise-control-multi-function-input-a-circuit-high","status":"publish","type":"post","link":"https:\/\/www.emanualonline.com\/blog\/p0581-obd2-cruise-control-multi-function-input-a-circuit-high","title":{"rendered":"P0581 OBD2: Cruise Control Multi-Function Input &#8220;A&#8221; Circuit High"},"content":{"rendered":"<p>The P0581 code is an OBD-II trouble code that indicates an issue with the cruise control system, specifically referring to a &#8220;Multi-Function Input &#8216;A&#8217; Circuit High&#8221; malfunction. This code is generated when the Body Control Module (BCM) detects an invalid input from the cruise control switches.<\/p>\n<h2>What Does the P0581 Code Mean?<\/h2>\n<p>The P0581 code means that the cruise control system&#8217;s multi-function input circuit is reading a high voltage signal, which suggests there is a problem with the inputs the BCM is receiving from the cruise control switches. As a result, the cruise control may not operate correctly.<\/p>\n<h2>What Causes the P0581 Code?<\/h2>\n<p>Several factors can trigger the P0581 code, including:<\/p>\n<ul>\n<li>Body Control Module (BCM) failure<\/li>\n<li>Cruise control master switch failure<\/li>\n<li>Wiring issues within the cruise control circuit<\/li>\n<\/ul>\n<h2>What Are the Symptoms of the P0581 Code?<\/h2>\n<p>The primary symptom associated with the P0581 code is that the cruise control will not operate. Drivers may notice that they are unable to activate or maintain cruise control functionality.<\/p>\n<h2>How Serious Is the P0581 Code?<\/h2>\n<p>The P0581 code is classified as a moderate severity code. While it may not pose an immediate threat to vehicle safety or functionality, it is essential to diagnose and address this issue in a timely manner to maintain optimal vehicle performance.<\/p>\n<h2>How to Diagnose the P0581 Code<\/h2>\n<p>To properly diagnose the P0581 code, a mechanic will typically follow these steps:<\/p>\n<ol>\n<li>Use an OBD-II scanner to confirm the presence of the P0581 code.<\/li>\n<li>Inspect the cruise control switches for any signs of damage or malfunction.<\/li>\n<li>Check the wiring and connectors associated with the cruise control system for frays, shorts, or corrosion.<\/li>\n<li>Test the Body Control Module to ensure it is functioning correctly.<\/li>\n<\/ol>\n<h2>Common Repairs for the P0581 Code<\/h2>\n<p>Repairs for the P0581 code may include:<\/p>\n<ul>\n<li>Replacing a faulty Body Control Module (BCM)<\/li>\n<li>Repairing or replacing the cruise control master switch<\/li>\n<li>Fixing any wiring issues or replacing damaged connectors<\/li>\n<\/ul>\n<h2>How Much Does It Cost to Fix the P0581 Code?<\/h2>\n<p>The cost to fix the P0581 code can vary significantly depending on the underlying issue. Basic repairs, such as fixing wiring or replacing a switch, may cost between $100 and $300. However, if the Body Control Module needs replacement, costs could rise to $500 or more, including parts and labor.<\/p>\n<h2>Can I Fix the P0581 Code Myself?<\/h2>\n<p>While some basic troubleshooting and repairs, such as inspecting wiring or replacing a switch, may be feasible for a DIY mechanic, it is advisable to consult a professional for accurate diagnosis and repair of the P0581 code. Proper tools and expertise are essential to ensure that the cruise control system functions safely and effectively.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The P0581 code is an OBD-II trouble code that indicates an issue with the cruise control system, specifically referring to a &#8220;Multi-Function Input &#8216;A&#8217; Circuit High&#8221; malfunction. This code is generated when the Body Control Module (BCM) detects an invalid input from the cruise control switches. What Does the P0581 Code Mean? The P0581 code &hellip;<\/p>\n","protected":false},"author":26,"featured_media":94087,"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-77893","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 P0581 \u2013 Causes, Symptoms, and Repairs<\/title>\n<meta name=\"description\" content=\"Learn all about the P0581 code, what causes cruise control multi-function input &#039;A&#039; circuit high, 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\/p0581-obd2-cruise-control-multi-function-input-a-circuit-high\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0581 OBD2: Cruise Control Multi-Function Input &quot;A&quot; Circuit High\" \/>\n<meta property=\"og:description\" content=\"The P0581 code is an OBD-II trouble code that indicates an issue with the cruise control system, specifically referring to a &quot;Multi-Function Input &#039;A&#039;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.emanualonline.com\/blog\/p0581-obd2-cruise-control-multi-function-input-a-circuit-high\" \/>\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=\"2025-08-26T16:18:33+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-26T16:25:37+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0581-obd2-cruise-control-multi-function-input-a-circuit-high.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 name=\"twitter:creator\" content=\"@eManualOnline\" \/>\n<meta name=\"twitter:site\" content=\"@eManualOnline\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"JC Landry\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p0581-obd2-cruise-control-multi-function-input-a-circuit-high#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p0581-obd2-cruise-control-multi-function-input-a-circuit-high\"},\"author\":{\"name\":\"JC Landry\",\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/#\\\/schema\\\/person\\\/e803434ab3cc70008b22b56253223403\"},\"headline\":\"P0581 OBD2: Cruise Control Multi-Function Input &#8220;A&#8221; 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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\/p0581-obd2-cruise-control-multi-function-input-a-circuit-high.png",1200,675,false],"thumbnail":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0581-obd2-cruise-control-multi-function-input-a-circuit-high-150x150.png",150,150,true],"medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0581-obd2-cruise-control-multi-function-input-a-circuit-high-300x169.png",300,169,true],"medium_large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0581-obd2-cruise-control-multi-function-input-a-circuit-high-768x432.png",618,348,true],"large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0581-obd2-cruise-control-multi-function-input-a-circuit-high-1024x576.png",618,348,true],"1536x1536":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0581-obd2-cruise-control-multi-function-input-a-circuit-high.png",1200,675,false],"2048x2048":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0581-obd2-cruise-control-multi-function-input-a-circuit-high.png",1200,675,false],"tie-small":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0581-obd2-cruise-control-multi-function-input-a-circuit-high-110x75.png",110,75,true],"tie-medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0581-obd2-cruise-control-multi-function-input-a-circuit-high-403x215.png",403,215,true],"tie-large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0581-obd2-cruise-control-multi-function-input-a-circuit-high-310x205.png",310,205,true],"slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0581-obd2-cruise-control-multi-function-input-a-circuit-high-660x330.png",660,330,true],"big-slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0581-obd2-cruise-control-multi-function-input-a-circuit-high-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 P0581 code is an OBD-II trouble code that indicates an issue with the cruise control system, specifically referring to a &#8220;Multi-Function Input &#8216;A&#8217; Circuit High&#8221; malfunction. This code is generated when the Body Control Module (BCM) detects an invalid input from the cruise control switches. What Does the P0581 Code Mean? 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