{"id":80245,"date":"2025-05-09T10:40:26","date_gmt":"2025-05-09T15:40:26","guid":{"rendered":"https:\/\/www.emanualonline.com\/blog\/?p=80245"},"modified":"2025-06-04T05:14:13","modified_gmt":"2025-06-04T10:14:13","slug":"p2803-obd2-transmission-range-sensor-b-circuit-high","status":"publish","type":"post","link":"https:\/\/www.emanualonline.com\/blog\/p2803-obd2-transmission-range-sensor-b-circuit-high","title":{"rendered":"P2803 OBD2: Transmission Range Sensor &#8220;B&#8221; Circuit High"},"content":{"rendered":"<p>The OBD-II code P2803 refers to a malfunction in the Transmission Range Sensor &#8220;B&#8221; Circuit. This code is significant as it indicates issues within the transmission system that can lead to improper shifting and other related problems.<\/p>\n<h2>What Does the P2803 Code Mean?<\/h2>\n<p>The P2803 code is triggered when the Transmission Range Sensor (also known as the PRNDL input or neutral safety switch) reports a high circuit condition. This sensor is critical for informing the engine control module (PCM) and transmission control module (TCM) about the position of the gear shift. When this sensor&#8217;s signal is erratic or out of range, the PCM sets the P2803 code.<\/p>\n<h2>What Causes the P2803 Code?<\/h2>\n<p>Several factors can lead to the P2803 code, including:<\/p>\n<ul>\n<li>Transmission range sensor failure<\/li>\n<li>Wiring issues related to the sensor<\/li>\n<li>Powertrain Control Module (PCM) failure<\/li>\n<li>Transmission Control Module (TCM) failure<\/li>\n<\/ul>\n<h2>What Are the Symptoms of the P2803 Code?<\/h2>\n<p>Drivers may experience the following symptoms when the P2803 code is present:<\/p>\n<ul>\n<li>Transmission may not shift properly<\/li>\n<li>Increased fuel consumption<\/li>\n<\/ul>\n<h2>How Serious Is the P2803 Code?<\/h2>\n<p>The P2803 code is classified as urgent, indicating that immediate action is necessary. Ignoring this fault can lead to severe damage to the vehicle&#8217;s transmission system and may pose safety risks to the driver and passengers.<\/p>\n<h2>How to Diagnose the P2803 Code<\/h2>\n<p>To accurately diagnose the P2803 code, a mechanic should:<\/p>\n<ol>\n<li>Use an OBD-II scanner to confirm the code and check for any additional trouble codes.<\/li>\n<li>Inspect the wiring and connectors related to the Transmission Range Sensor for any damage or corrosion.<\/li>\n<li>Test the Transmission Range Sensor for proper operation.<\/li>\n<li>Check the PCM and TCM for faults if the sensor appears to be functioning correctly.<\/li>\n<\/ol>\n<h2>Common Repairs for the P2803 Code<\/h2>\n<p>Repairs for the P2803 code may include:<\/p>\n<ul>\n<li>Replacing the Transmission Range Sensor<\/li>\n<li>Repairing or replacing damaged wiring or connectors<\/li>\n<li>Replacing or reprogramming the Powertrain Control Module (PCM)<\/li>\n<li>Replacing or repairing the Transmission Control Module (TCM)<\/li>\n<\/ul>\n<h2>How Much Does It Cost to Fix the P2803 Code?<\/h2>\n<p>Repair costs for the P2803 code can vary widely depending on the specific issue and labor rates in your area. On average, you might expect to pay anywhere from $100 to $600, including parts and labor. Replacing the Transmission Range Sensor is typically the most common repair.<\/p>\n<h2>Can I Fix the P2803 Code Myself?<\/h2>\n<p>While some DIY enthusiasts may be able to address wiring issues or replace the Transmission Range Sensor, it is essential to have a good understanding of automotive systems. Proper diagnosis is critical, as simply replacing parts without understanding the root cause can lead to further problems. If you are not confident in your skills, it is recommended to seek professional assistance.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The OBD-II code P2803 refers to a malfunction in the Transmission Range Sensor &#8220;B&#8221; Circuit. This code is significant as it indicates issues within the transmission system that can lead to improper shifting and other related problems. What Does the P2803 Code Mean? The P2803 code is triggered when the Transmission Range Sensor (also known &hellip;<\/p>\n","protected":false},"author":26,"featured_media":81555,"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-80245","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 P2803 \u2013 Causes, Symptoms, and Repairs<\/title>\n<meta name=\"description\" content=\"Learn all about the P2803 code, what causes transmission range sensor issues, and how to diagnose and fix common problems to maintain optimal vehicle 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\/p2803-obd2-transmission-range-sensor-b-circuit-high\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P2803 OBD2: Transmission Range Sensor &quot;B&quot; Circuit High\" \/>\n<meta property=\"og:description\" content=\"The OBD-II code P2803 refers to a malfunction in the Transmission Range Sensor &quot;B&quot; Circuit. 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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\/p2803-obd2-transmission-range-sensor-b-circuit-high.png",1200,675,false],"thumbnail":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2803-obd2-transmission-range-sensor-b-circuit-high-150x150.png",150,150,true],"medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2803-obd2-transmission-range-sensor-b-circuit-high-300x169.png",300,169,true],"medium_large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2803-obd2-transmission-range-sensor-b-circuit-high-768x432.png",618,348,true],"large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2803-obd2-transmission-range-sensor-b-circuit-high-1024x576.png",618,348,true],"1536x1536":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2803-obd2-transmission-range-sensor-b-circuit-high.png",1200,675,false],"2048x2048":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2803-obd2-transmission-range-sensor-b-circuit-high.png",1200,675,false],"tie-small":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2803-obd2-transmission-range-sensor-b-circuit-high-110x75.png",110,75,true],"tie-medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2803-obd2-transmission-range-sensor-b-circuit-high-403x215.png",403,215,true],"tie-large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2803-obd2-transmission-range-sensor-b-circuit-high-310x205.png",310,205,true],"slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2803-obd2-transmission-range-sensor-b-circuit-high-660x330.png",660,330,true],"big-slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/05\/p2803-obd2-transmission-range-sensor-b-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 OBD-II code P2803 refers to a malfunction in the Transmission Range Sensor &#8220;B&#8221; Circuit. 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