{"id":64592,"date":"2022-01-11T22:16:03","date_gmt":"2022-01-12T06:16:03","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=64592"},"modified":"2024-08-19T23:48:02","modified_gmt":"2024-08-20T06:48:02","slug":"p0847-code-transmission-fluid-pressure-sensor-switch-b-circuit-low","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p0847-code-transmission-fluid-pressure-sensor-switch-b-circuit-low\/","title":{"rendered":"P0847 Code: Transmission Fluid Pressure Sensor \/ Switch &#8220;B&#8221; Circuit Low"},"content":{"rendered":"<!DOCTYPE html PUBLIC \"-\/\/W3C\/\/DTD HTML 4.0 Transitional\/\/EN\" \"http:\/\/www.w3.org\/TR\/REC-html40\/loose.dtd\">\n<html><body><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 3<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column64592_7734cb-bd > .kt-inside-inner-col,.kadence-column64592_7734cb-bd > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column64592_7734cb-bd > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column64592_7734cb-bd > .kt-inside-inner-col{flex-direction:column;}.kadence-column64592_7734cb-bd > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column64592_7734cb-bd > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column64592_7734cb-bd{position:relative;}@media all and (max-width: 1024px){.kadence-column64592_7734cb-bd > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column64592_7734cb-bd > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column64592_7734cb-bd inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-6c3e18  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-251743\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading64592_9c577d-a9, .wp-block-kadence-advancedheading.kt-adv-heading64592_9c577d-a9[data-kb-block=\"kb-adv-heading64592_9c577d-a9\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading64592_9c577d-a9 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading64592_9c577d-a9[data-kb-block=\"kb-adv-heading64592_9c577d-a9\"] mark.kt-highlight{font-family:Inter;font-weight:500;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading64592_9c577d-a9 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading64592_9c577d-a9[data-kb-block=\"kb-adv-heading64592_9c577d-a9\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading64592_9c577d-a9 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading64592_9c577d-a9\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Diagnostic trouble code (DTC) P0847 stands for &ldquo;Transmission Fluid Pressure Sensor\/Switch &lsquo;B&rsquo; Circuit Low.&rdquo; This code is triggered when the powertrain control module (PCM) detects an issue with the hydraulic clutch or the pressure switch.<\/li>\n\n\n\n<li>This code is caused by a failed transmission fluid pressure sensor, PCM or transmission control module (TCM) issues, wiring problems, low transmission fluid, or an internal transmission problem.<\/li>\n\n\n\n<li>The issues causing this code can lead to an illuminated check engine light, shift quality changes, poor fuel efficiency, and enable limp mode.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p class=\"wp-block-paragraph\">On-board diagnostic (OBD) codes help mechanics and vehicle owners identify possible issues in a vehicle. But before you can troubleshoot and resolve these problems, it&rsquo;s important to know what these codes mean.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Code P0847 is one of many trouble codes that can be logged and retrieved from the OBD system. Here is some helpful information that can help you understand what getting this code may mean for your vehicle.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P0847 Code Mean?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.carparts.com\/blog\/search-obd2-codes-list\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Diagnostic trouble code\">Diagnostic trouble code<\/a> (DTC) P0847 stands for &ldquo;Transmission Fluid Pressure Sensor\/Switch &lsquo;B&rsquo; Circuit Low.&rdquo; This code is logged when the powertrain control module (PCM) detects an issue with the hydraulic clutch or the pressure switch.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Basically, the pressure switches in a transmission are for feedback and shift timing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Honda describes the P0847 this way:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1. This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2. If DTC P0847 is stored in the PCM, the transmission does not shift to any gear other than 3rd or 6th gear because of the fail-safe function.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"678\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/11\/shift-solenoid-diagram-1024x678.png\" alt=\"shift solenoid diagram\" class=\"wp-image-77689\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/11\/shift-solenoid-diagram-1024x678.png 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/11\/shift-solenoid-diagram-300x199.png 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/11\/shift-solenoid-diagram-768x508.png 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/11\/shift-solenoid-diagram-150x99.png 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/11\/shift-solenoid-diagram.png 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">Shift solenoids diagram | Image source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The transmission fluid pressure sensor\/switch converts pressure from the mechanical transmission into an electrical signal for the <a href=\"https:\/\/www.carparts.com\/engine-control-module\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"PCM\">PCM<\/a>. The PCM then uses this information to determine transmission operating pressure.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The P0847 code is set if the &ldquo;B&rdquo; input does not match normal operating voltages stored in the PCM&rsquo;s memory. The code can also be logged due to a variety of different reasons, ranging from a faulty sensor to internal mechanical issues inside the transmission.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Depending on the severity of the problem, related error codes might also be stored with this DTC. Code P0847 is very similar to error codes P0845, <a href=\"https:\/\/www.carparts.com\/blog\/p0846-code-transmission-fluid-pressure-sensor-switch-b-circuit-range-performance\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"P0846\">P0846<\/a>, <a href=\"https:\/\/www.carparts.com\/blog\/p0848-code-transmission-fluid-pressure-sensor-switch-b-circuit-high\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"P0848\">P0848<\/a>, and P0849.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1700\" height=\"1561\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/12\/powertrain-control-module-detects-an-issue-with-the-hydraulic-clutch.JPG\" alt=\"powertrain control module detects an issue with the hydraulic clutch\" class=\"wp-image-64598\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/12\/powertrain-control-module-detects-an-issue-with-the-hydraulic-clutch.JPG 1700w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/12\/powertrain-control-module-detects-an-issue-with-the-hydraulic-clutch-300x275.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/12\/powertrain-control-module-detects-an-issue-with-the-hydraulic-clutch-1024x940.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/12\/powertrain-control-module-detects-an-issue-with-the-hydraulic-clutch-768x705.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/12\/powertrain-control-module-detects-an-issue-with-the-hydraulic-clutch-1536x1410.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/12\/powertrain-control-module-detects-an-issue-with-the-hydraulic-clutch-150x138.jpg 150w\" sizes=\"(max-width: 1700px) 100vw, 1700px\"><figcaption class=\"wp-element-caption\">P0847 code is logged when the powertrain control module (PCM) detects an issue with the hydraulic clutch or the pressure switch.<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><em><strong>Note:<\/strong> The definition of code P0847 may be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.<\/em><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Common Causes of the P0847 Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.carparts.com\/automatic-transmission-pressure-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Transmission fluid pressure sensor\">Transmission fluid pressure sensor<\/a> failure<\/li>\n\n\n\n<li>Issues with the powertrain control module (PCM) or <a href=\"https:\/\/www.carparts.com\/transmission-control-module\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"transmission control module\">transmission control module<\/a> (TCM)<\/li>\n\n\n\n<li>Wiring problems<\/li>\n\n\n\n<li><a href=\"https:\/\/www.carparts.com\/blog\/car-fluids-to-check-infographic\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Low transmission fluid level\">Low transmission fluid level<\/a><\/li>\n\n\n\n<li>An internal transmission mechanical problem<\/li>\n<\/ul>\n\n\n\n<div id=\"article-search-widget\">\n<div class=\"cp-search\">\n<div align=\"center\">\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/w_auto,dpr_auto\/carparts\/logos\/badge_wordmark\/full_color\/CP_LOGO_COLOUR_RGB\" alt=\"CarParts.com\" width=\"300\" height=\"56\">\n<\/div>\n<form id=\"cpsearchform\" name=\"cpsearchform\" action=\"https:\/\/www.carparts.com\/search\" method=\"get\" target=\"_blank\" accept-charset=\"character_set\" aria-label=\"search CarParts.com\">\n    <input type=\"text\" class=\"keyword\" name=\"q\" placeholder=\"Search for parts on CarParts.com\" value=\"\" aria-label=\"Search CarParts.com\"><input type=\"submit\" class=\"btn-search\" value=\"Search\" aria-label=\"Search\">\n<\/form>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Common Symptoms of the P0847 Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.carparts.com\/blog\/check-engine-light-flashing\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Illuminated check engine light\">Illuminated check engine light<\/a><\/li>\n\n\n\n<li>Change in shift quality<\/li>\n\n\n\n<li><a href=\"https:\/\/www.carparts.com\/blog\/15-fuel-economy-hacks-that-can-save-you-money-at-the-pump\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Poor fuel efficiency\">Poor fuel efficiency<\/a><\/li>\n\n\n\n<li>Transmission may not shift properly<\/li>\n\n\n\n<li>Vehicle in <a href=\"https:\/\/www.carparts.com\/blog\/web-stories\/what-is-limp-mode\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"limp mode\">limp mode<\/a><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P0847 Code<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Different makes and models can set the error code P0847. But this does not mean that there is a one-size-fits-all approach to diagnosing its underlying cause. The steps for troubleshooting this code will vary depending on your specific vehicle.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Check out the video below to get an idea of what the diagnostic process for this code might involve:<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"2010 Honda Fit: Step by step diagnosis and repair of Code P0847. (6-2020)\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/sG1rHBECpzM?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">How to Fix the P0847 Code<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Code P0847 shares similar triggers and symptoms with other engine codes. However, the appropriate diagnostic and repair procedure will depend on the specifications of your vehicle. If you&rsquo;re unfamiliar with auto repair, it&rsquo;s best to leave the job to a mechanic.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you&rsquo;re considering troubleshooting this code on your own, it&rsquo;s a good idea to refresh your automotive knowledge before attempting any fixes. Always consult a vehicle-specific <a href=\"https:\/\/www.carparts.com\/blog\/why-you-should-always-consult-a-repair-manual\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"repair manual or an online repair database\">repair manual or an online repair database<\/a> to learn the appropriate diagnostic procedures for this code.<\/p>\n<\/body><\/html>\n","protected":false},"excerpt":{"rendered":"<p><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 3<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>On-board diagnostic (OBD) codes help mechanics and vehicle owners identify possible issues in a vehicle. But before you can troubleshoot&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p0847-code-transmission-fluid-pressure-sensor-switch-b-circuit-low\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":64597,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":true,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":"","_ppma_block_editor_authors":""},"categories":[1314],"tags":[3167],"ppma_author":[2607,2985],"class_list":["post-64592","post","type-post","status-publish","format-standard","has-post-thumbnail","category-obd-ii-trouble-codes","tag-automatic-transmission-pressure-sensor","entry"],"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P0847 Code: Transmission Fluid Pressure Sensor \/ Switch &quot;B&quot; Circuit Low - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Find out what code P0847 means, its triggers, usual symptoms, and the common solutions you can try to resolve it.\" \/>\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.carparts.com\/blog\/p0847-code-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 Code: Transmission Fluid Pressure Sensor \/ Switch &quot;B&quot; Circuit Low - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Find out what code P0847 means, its triggers, usual symptoms, and the common solutions you can try to resolve it.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/p0847-code-transmission-fluid-pressure-sensor-switch-b-circuit-low\/\" \/>\n<meta property=\"og:site_name\" content=\"In The Garage with CarParts.com\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/carpartscom\" \/>\n<meta property=\"article:published_time\" content=\"2022-01-12T06:16:03+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-08-20T06:48:02+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/12\/male-mechanic-does-OBD-check-on-white-car-scaled.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2048\" \/>\n\t<meta property=\"og:image:height\" content=\"1365\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:site\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0847-code-transmission-fluid-pressure-sensor-switch-b-circuit-low\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0847-code-transmission-fluid-pressure-sensor-switch-b-circuit-low\\\/\"},\"author\":[{\"@type\":\"Person\",\"$id\":\"4\",\"name\":\"CarParts.com Research Team\",\"jobTitle\":\"Expert Automotive Writer\",\"description\":\"The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. 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Richard has worked for nearly 50 years in the automotive field as a professional technician, an instructor, a freelance automotive writer for Motor Age, ACtion magazine, Power Stroke Registry, and others (published every year since May 2000). He has developed training courses and written or edited training material for companies in the U.S. Canada, and the Netherlands, and even Bulgaria. He maintained an \u201cask a mechanic\u201d website for 10 years answering questions emailed to him from all over the world.\r\n\r\nRichard has an instructional automotive YouTube channel \u201cMcCuistian\u201d with 13,500 subscribers and over 1,300 videos. Much of his professional work requires photography and videography in shop environments, but Richard also enjoys taking pictures of landscapes, skyscapes, old barns and houses, small towns. He has produced a coffee table book of digital watercolors called \u201cMemories of South Alabama\u201d created from his personal photos, along with a dozen Christian fiction short original novels and a collection of short stories, all available in Kindle or softcover format. 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He has won two International Automotive Media Awards for technical articles published in trade magazines.<\/p><\/li>\r\n<li><p>Has attended hundreds of hours of automotive training from OEMs including GM, Volkswagen, Mazda, Renault, Jeep, Chrysler, as well as additional training at events like KC Vision and MACS (Mobile Air Climate Systems Association).<\/p><\/li>\r\n<li><p>Taught college level auto mechanics for 19 years.<\/p><\/li>\r\n<li><p>Has written for automotive training companies (including course development work for training companies in Canada and the Netherlands) and has been hired to teach professional trade show technician courses at multiple training events in Texas and Alabama.<\/p><\/li>\r\n<li><p>While still teaching at the college level, Richard launched a new automotive program in Geneva, Alabama, setting up a dual enrollment department in a new building, organizing the shop and classroom, teaching morning classes to high school students for 2 years while still teaching at the college in the afternoon.<\/p><\/li>\r\n<li><p>Richard\u2019s college program at Lurleen B. 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