{"id":78897,"date":"2025-07-23T15:43:59","date_gmt":"2025-07-23T20:43:59","guid":{"rendered":"https:\/\/www.emanualonline.com\/blog\/?p=78897"},"modified":"2025-07-23T15:43:59","modified_gmt":"2025-07-23T20:43:59","slug":"p0b79-obd2-hybrid-battery-voltage-sense-m-circuit-low","status":"publish","type":"post","link":"https:\/\/www.emanualonline.com\/blog\/p0b79-obd2-hybrid-battery-voltage-sense-m-circuit-low","title":{"rendered":"P0B79 OBD2: Hybrid Battery Voltage Sense &#8220;M&#8221; Circuit Low"},"content":{"rendered":"<p>The P0B79 code is an OBD-II trouble code that indicates a problem with the hybrid battery voltage sense &#8220;M&#8221; circuit. This code is primarily associated with hybrid vehicles, where the proper functioning of the high voltage battery system is crucial for the vehicle&#8217;s performance.<\/p>\n<h2>What Does the P0B79 Code Mean?<\/h2>\n<p>The P0B79 code signifies that the High Voltage Control Module has detected a low voltage condition in one of the battery packs that make up the High Voltage Battery Assembly. This can lead to various operational issues in the hybrid system, affecting the overall performance of the vehicle.<\/p>\n<h2>What Causes the P0B79 Code?<\/h2>\n<p>Several factors can trigger the P0B79 code, including:<\/p>\n<ul>\n<li>High voltage battery connection failure<\/li>\n<li>High voltage battery assembly failure<\/li>\n<li>Wiring issues related to the battery pack<\/li>\n<\/ul>\n<h2>What Are the Symptoms of the P0B79 Code?<\/h2>\n<p>Common symptoms associated with the P0B79 code include:<\/p>\n<ul>\n<li>Increased fuel consumption<\/li>\n<li>Possible warning lights on the dashboard<\/li>\n<li>Reduced performance of the hybrid system<\/li>\n<\/ul>\n<h2>How Serious Is the P0B79 Code?<\/h2>\n<p>The P0B79 code is considered urgent, as it indicates a significant malfunction that could lead to severe damage to the vehicle or pose risks to driver and passenger safety. Immediate attention is recommended to avoid more costly repairs down the line.<\/p>\n<h2>How to Diagnose the P0B79 Code<\/h2>\n<p>To properly diagnose the P0B79 code, a mechanic should:<\/p>\n<ul>\n<li>Use an OBD-II scanner to confirm the presence of the code.<\/li>\n<li>Inspect the high voltage battery connections for any signs of damage or corrosion.<\/li>\n<li>Test the battery assembly and voltage readings from individual battery packs.<\/li>\n<li>Check the wiring and connectors for any faults.<\/li>\n<\/ul>\n<h2>Common Repairs for the P0B79 Code<\/h2>\n<p>Repairs for the P0B79 code may include:<\/p>\n<ul>\n<li>Repairing or replacing faulty wiring or connectors.<\/li>\n<li>Replacing the high voltage battery assembly if it is determined to be defective.<\/li>\n<li>Ensuring proper connections are made to the battery packs.<\/li>\n<\/ul>\n<h2>How Much Does It Cost to Fix the P0B79 Code?<\/h2>\n<p>The cost to fix the P0B79 code can vary widely depending on the underlying issue. Basic repairs, such as wiring fixes, may range from $100 to $300, while replacing the high voltage battery assembly can cost anywhere from $1,000 to $6,000 or more, depending on the vehicle model.<\/p>\n<h2>Can I Fix the P0B79 Code Myself?<\/h2>\n<p>While some aspects of diagnosing and repairing the P0B79 code can be handled by knowledgeable DIYers, it is recommended to seek professional assistance. The hybrid battery system is complex and working on high voltage components can be dangerous without proper training and equipment. A professional can ensure that the problem is accurately diagnosed and repaired safely.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The P0B79 code is an OBD-II trouble code that indicates a problem with the hybrid battery voltage sense &#8220;M&#8221; circuit. This code is primarily associated with hybrid vehicles, where the proper functioning of the high voltage battery system is crucial for the vehicle&#8217;s performance. What Does the P0B79 Code Mean? The P0B79 code signifies that &hellip;<\/p>\n","protected":false},"author":26,"featured_media":91077,"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-78897","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 v27.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>OBD2 Code P0B79 \u2013 Causes, Symptoms, and Repairs<\/title>\n<meta name=\"description\" content=\"Learn all about the P0B79 code, what causes hybrid battery voltage sense &quot;M&quot; 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\/p0b79-obd2-hybrid-battery-voltage-sense-m-circuit-low\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0B79 OBD2: Hybrid Battery Voltage Sense &quot;M&quot; Circuit Low\" \/>\n<meta property=\"og:description\" content=\"The P0B79 code is an OBD-II trouble code that indicates a problem with the hybrid battery voltage sense &quot;M&quot; circuit. 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