{"id":79597,"date":"2025-06-09T14:25:06","date_gmt":"2025-06-09T19:25:06","guid":{"rendered":"https:\/\/www.emanualonline.com\/blog\/?p=79597"},"modified":"2025-09-15T22:16:33","modified_gmt":"2025-09-16T03:16:33","slug":"p2245-obd2-o2-sensor-reference-voltage-circuit-low","status":"publish","type":"post","link":"https:\/\/www.emanualonline.com\/blog\/p2245-obd2-o2-sensor-reference-voltage-circuit-low","title":{"rendered":"P2245 OBD2: O2 Sensor Reference Voltage Circuit Low (Bank 1 Sensor 1)"},"content":{"rendered":"<p>The OBD-II code P2245 indicates an issue with the oxygen sensor reference voltage circuit being too low. This is a moderate severity code that can affect your vehicle&#8217;s performance and fuel efficiency.<\/p>\n<h2>What Does the P2245 Code Mean?<\/h2>\n<p>This code signifies that the Powertrain Control Module (PCM) has detected a fault in the oxygen sensor reference voltage circuit. The oxygen sensor plays a critical role in measuring the oxygen content in the exhaust gases, which is essential for maintaining fuel economy and engine performance.<\/p>\n<h2>What Causes the P2245 Code?<\/h2>\n<p>Several factors can trigger the P2245 code, including:<\/p>\n<ul>\n<li>Exhaust leaks<\/li>\n<li>Oxygen sensor failure<\/li>\n<li>Powertrain Control Module (PCM) failure<\/li>\n<li>Wiring issues<\/li>\n<\/ul>\n<h2>What Are the Symptoms of the P2245 Code?<\/h2>\n<p>Drivers may experience the following symptoms:<\/p>\n<ul>\n<li>Decreased engine performance<\/li>\n<li>Increased fuel consumption<\/li>\n<\/ul>\n<h2>How Serious Is the P2245 Code?<\/h2>\n<p>While the P2245 code is classified as moderate in severity and may not pose an immediate threat to your vehicle&#8217;s safety, it is advisable to have it diagnosed promptly. Ignoring this code could lead to more significant issues down the line.<\/p>\n<h2>How to Diagnose the P2245 Code<\/h2>\n<p>To properly diagnose the P2245 code, a technician will typically follow these steps:<\/p>\n<ol>\n<li>Use an OBD-II scanner to confirm the P2245 code and check for any other related codes.<\/li>\n<li>Inspect the oxygen sensor and its wiring for any visible damage.<\/li>\n<li>Check for exhaust leaks that may impact sensor readings.<\/li>\n<li>Test the oxygen sensor&#8217;s voltage output and compare it to manufacturer specifications.<\/li>\n<li>Examine the Powertrain Control Module for any faults.<\/li>\n<\/ol>\n<h2>Common Repairs for the P2245 Code<\/h2>\n<p>Some common repairs that may be needed to resolve the P2245 code include:<\/p>\n<ul>\n<li>Oxygen sensor replacement<\/li>\n<\/ul>\n<h2>How Much Does It Cost to Fix the P2245 Code?<\/h2>\n<p>The cost to repair the P2245 code can vary widely depending on the specific issue and labor costs in your area. Typically, replacing an oxygen sensor can range from $100 to $300, including parts and labor.<\/p>\n<h2>Can I Fix the P2245 Code Myself?<\/h2>\n<p>If you have some mechanical knowledge and the right tools, you may be able to diagnose and potentially fix the P2245 code yourself. However, if the problem lies with the PCM or if you are unsure about any steps, it\u2019s best to consult with a professional mechanic to ensure the issue is resolved correctly.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The OBD-II code P2245 indicates an issue with the oxygen sensor reference voltage circuit being too low. This is a moderate severity code that can affect your vehicle&#8217;s performance and fuel efficiency. What Does the P2245 Code Mean? This code signifies that the Powertrain Control Module (PCM) has detected a fault in the oxygen sensor &hellip;<\/p>\n","protected":false},"author":26,"featured_media":88350,"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-79597","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 P2245 \u2013 Causes, Symptoms, and Repairs<\/title>\n<meta name=\"description\" content=\"Learn all about the P2245 code, what causes O2 sensor reference voltage 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\/p2245-obd2-o2-sensor-reference-voltage-circuit-low\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P2245 OBD2: O2 Sensor Reference Voltage Circuit Low (Bank 1 Sensor 1)\" \/>\n<meta property=\"og:description\" content=\"The OBD-II code P2245 indicates an issue with the oxygen sensor reference voltage circuit being too low. This is a moderate severity code that can affect\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.emanualonline.com\/blog\/p2245-obd2-o2-sensor-reference-voltage-circuit-low\" \/>\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=\"2025-06-09T19:25:06+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-09-16T03:16:33+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/06\/p2245-obd2-o2-sensor-reference-voltage-circuit-low.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 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This is a moderate severity code that can affect your vehicle&#8217;s performance and fuel efficiency. What Does the P2245 Code Mean? This code signifies that the Powertrain Control Module (PCM) has detected a fault in the oxygen sensor&hellip;","_links":{"self":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/79597","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=79597"}],"version-history":[{"count":2,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/79597\/revisions"}],"predecessor-version":[{"id":96523,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/79597\/revisions\/96523"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media\/88350"}],"wp:attachment":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media?parent=79597"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/categories?post=79597"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/tags?post=79597"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}