{"id":78344,"date":"2025-08-15T14:54:50","date_gmt":"2025-08-15T19:54:50","guid":{"rendered":"https:\/\/www.emanualonline.com\/blog\/?p=78344"},"modified":"2025-08-15T14:54:50","modified_gmt":"2025-08-15T19:54:50","slug":"p0847-obd2-transmission-fluid-pressure-sensor-switch-b-circuit-low","status":"publish","type":"post","link":"https:\/\/www.emanualonline.com\/blog\/p0847-obd2-transmission-fluid-pressure-sensor-switch-b-circuit-low","title":{"rendered":"P0847 OBD2: Transmission Fluid Pressure Sensor\/Switch &#8220;B&#8221; Circuit Low"},"content":{"rendered":"<p>The P0847 OBD-II code indicates a problem with the Transmission Fluid Pressure Sensor or Switch &#8220;B&#8221; circuit. This code typically signifies that the transmission control system is not receiving the correct pressure readings from the transmission fluid pressure sensor, which is crucial for optimal transmission performance.<\/p>\n<h2>What Does the P0847 Code Mean?<\/h2>\n<p>The P0847 code means that the engine&#8217;s control module (PCM) or Transmission Control Module (TCM) has detected a low voltage signal from the Transmission Fluid Pressure Sensor\/Switch &#8220;B&#8221;. This situation can lead to improper shifting of the transmission, which can affect vehicle performance.<\/p>\n<h2>What Causes the P0847 Code?<\/h2>\n<ul>\n<li>Transmission Control Module (TCM) failure<\/li>\n<li>Low transmission fluid level<\/li>\n<li>Failure of the transmission fluid pressure sensor<\/li>\n<li>Wiring issues related to the sensor or module<\/li>\n<\/ul>\n<h2>What Are the Symptoms of the P0847 Code?<\/h2>\n<ul>\n<li>Transmission may not shift properly<\/li>\n<li>Increased fuel consumption<\/li>\n<li>Possible slipping of the transmission<\/li>\n<li>Check Engine Light illuminated<\/li>\n<\/ul>\n<h2>How Serious Is the P0847 Code?<\/h2>\n<p>The P0847 code is classified as urgent, meaning immediate attention is necessary. Ignoring this code could lead to severe transmission damage, which may compromise vehicle safety and performance.<\/p>\n<h2>How to Diagnose the P0847 Code<\/h2>\n<p>Diagnosing the P0847 code involves several steps:<\/p>\n<ol>\n<li>Use an OBD-II scanner to confirm the P0847 code and check for other related codes.<\/li>\n<li>Inspect the transmission fluid level and condition.<\/li>\n<li>Examine the wiring and connectors related to the transmission fluid pressure sensor for damage or disconnection.<\/li>\n<li>Test the transmission fluid pressure sensor using a multimeter.<\/li>\n<li>Check the functionality of the Transmission Control Module (TCM).<\/li>\n<\/ol>\n<h2>Common Repairs for the P0847 Code<\/h2>\n<ul>\n<li>Replacing the transmission fluid pressure sensor<\/li>\n<li>Repairing or replacing damaged wiring or connectors<\/li>\n<li>Refilling or changing the transmission fluid<\/li>\n<li>Replacing the Transmission Control Module (TCM) if necessary<\/li>\n<\/ul>\n<h2>How Much Does It Cost to Fix the P0847 Code?<\/h2>\n<p>The cost to fix the P0847 code can vary widely depending on the specific issue. On average, repairs may range from $100 to $1,500. Sensor replacement is typically less expensive, while TCM replacement can be on the higher end of that range.<\/p>\n<h2>Can I Fix the P0847 Code Myself?<\/h2>\n<p>While some aspects of diagnosing and fixing the P0847 code can be done by a knowledgeable DIYer, it is recommended to have professional assistance, especially if the issue involves the Transmission Control Module or complex wiring. Proper diagnosis is crucial to avoid unnecessary repairs.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The P0847 OBD-II code indicates a problem with the Transmission Fluid Pressure Sensor or Switch &#8220;B&#8221; circuit. This code typically signifies that the transmission control system is not receiving the correct pressure readings from the transmission fluid pressure sensor, which is crucial for optimal transmission performance. What Does the P0847 Code Mean? The P0847 code &hellip;<\/p>\n","protected":false},"author":26,"featured_media":92871,"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-78344","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 v27.9 (Yoast SEO v27.9) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>OBD2 Code P0847 \u2013 Causes, Symptoms, and Repairs<\/title>\n<meta name=\"description\" content=\"Learn all about the P0847 code, what causes transmission fluid pressure sensor\/switch &quot;B&quot; circuit low, and how to diagnose and fix common issues to maintain optimal transmission 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\/p0847-obd2-transmission-fluid-pressure-sensor-switch-b-circuit-low\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0847 OBD2: Transmission Fluid Pressure Sensor\/Switch &quot;B&quot; Circuit Low\" \/>\n<meta property=\"og:description\" content=\"The P0847 OBD-II code indicates a problem with the Transmission Fluid Pressure Sensor or Switch &quot;B&quot; circuit. 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He's worked across dealerships, owned and operated his own independent garage, and consulted on automotive trade school curricula, reviewing technical textbooks used in vocational programs. He now serves as Editor-in-Chief at eManualOnline.com, where he oversees the platform's technical content. He's one of the few voices in automotive publishing who has actually turned wrenches professionally on the vehicles he covers. He didn't learn automotive repair to write about it. He learned to write after spending over a decade doing it.","sameAs":["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\/p0847-obd2-transmission-fluid-pressure-sensorswitch-b-circuit-low.png",1200,675,false],"thumbnail":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0847-obd2-transmission-fluid-pressure-sensorswitch-b-circuit-low-150x150.png",150,150,true],"medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0847-obd2-transmission-fluid-pressure-sensorswitch-b-circuit-low-300x169.png",300,169,true],"medium_large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0847-obd2-transmission-fluid-pressure-sensorswitch-b-circuit-low-768x432.png",618,348,true],"large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0847-obd2-transmission-fluid-pressure-sensorswitch-b-circuit-low-1024x576.png",618,348,true],"1536x1536":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0847-obd2-transmission-fluid-pressure-sensorswitch-b-circuit-low.png",1200,675,false],"2048x2048":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0847-obd2-transmission-fluid-pressure-sensorswitch-b-circuit-low.png",1200,675,false],"tie-small":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0847-obd2-transmission-fluid-pressure-sensorswitch-b-circuit-low-110x75.png",110,75,true],"tie-medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0847-obd2-transmission-fluid-pressure-sensorswitch-b-circuit-low-403x215.png",403,215,true],"tie-large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0847-obd2-transmission-fluid-pressure-sensorswitch-b-circuit-low-310x205.png",310,205,true],"slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0847-obd2-transmission-fluid-pressure-sensorswitch-b-circuit-low-660x330.png",660,330,true],"big-slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0847-obd2-transmission-fluid-pressure-sensorswitch-b-circuit-low-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 P0847 OBD-II code indicates a problem with the Transmission Fluid Pressure Sensor or Switch &#8220;B&#8221; circuit. This code typically signifies that the transmission control system is not receiving the correct pressure readings from the transmission fluid pressure sensor, which is crucial for optimal transmission performance. What Does the P0847 Code Mean? The P0847 code&hellip;","_links":{"self":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/78344","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=78344"}],"version-history":[{"count":1,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/78344\/revisions"}],"predecessor-version":[{"id":85043,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/78344\/revisions\/85043"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media\/92871"}],"wp:attachment":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media?parent=78344"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/categories?post=78344"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/tags?post=78344"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}