{"id":71336,"date":"2022-09-05T23:25:38","date_gmt":"2022-09-06T06:25:38","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=71336"},"modified":"2023-09-04T22:13:42","modified_gmt":"2023-09-05T05:13:42","slug":"p0842-code-transmission-fluid-pressure-sensor-switch-a-circuit-low","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p0842-code-transmission-fluid-pressure-sensor-switch-a-circuit-low\/","title":{"rendered":"P0842 Code: Transmission Fluid Pressure Sensor \/ Switch &#8220;A&#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-column_204253-75 > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_204253-75 > .kt-inside-inner-col,.kadence-column_204253-75 > .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-column_204253-75 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_204253-75 > .kt-inside-inner-col{flex-direction:column;}.kadence-column_204253-75 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_204253-75 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_204253-75{position:relative;}@media all and (max-width: 1024px){.kadence-column_204253-75 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_204253-75 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_204253-75 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-7cf38d  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-176d20\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_ed0f5f-e4, .wp-block-kadence-advancedheading.kt-adv-heading_ed0f5f-e4[data-kb-block=\"kb-adv-heading_ed0f5f-e4\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_ed0f5f-e4 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_ed0f5f-e4[data-kb-block=\"kb-adv-heading_ed0f5f-e4\"] 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-heading_ed0f5f-e4 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_ed0f5f-e4[data-kb-block=\"kb-adv-heading_ed0f5f-e4\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_ed0f5f-e4 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_ed0f5f-e4\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>A P0842 code is commonly defined as a &ldquo;Transmission Fluid Pressure Sensor \/ Switch &lsquo;A&rsquo; Circuit Low.&rdquo;<\/li><li>The code is logged once the TFPS input doesn&rsquo;t match the expected value stored in the PCM.<\/li><li>The code may also indicate a possible mechanical issue within the transmission.&nbsp;<\/li><li>A bad or shorted TFPS sensor, a circuit problem, or a malfunctioning PCM can trigger the code.<\/li><li>Some of the symptoms associated with this code include incorrect transmission shifting and the vehicle being stuck in limp mode.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Is your scanner tool detecting a P0842 code? This might indicate some problems with your vehicle. P0842 is a <a href=\"https:\/\/www.carparts.com\/blog\/search-obd2-codes-list\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"diagnostic trouble code (DTC)\">diagnostic trouble code (DTC)<\/a> that requires a certain level of auto repair knowledge and skills to troubleshoot. If you want to repair your vehicle, you&rsquo;ll first have to learn the definition, causes, symptoms, and common fixes for this code.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P0842 Code Mean?<\/h2>\n\n\n\n<p>A P0842 code is commonly defined as a &ldquo;Transmission Fluid Pressure Sensor \/ Switch &ldquo;A&rdquo; Circuit Low. This generic transmission code can affect a variety of vehicles with OBD-II, including those made by <a href=\"https:\/\/www.carparts.com\/chrysler\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Chrysler\">Chrysler<\/a>, <a href=\"https:\/\/www.carparts.com\/ford\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Ford\">Ford<\/a>, <a href=\"https:\/\/www.carparts.com\/dodge\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Dodge\">Dodge<\/a>, <a href=\"https:\/\/www.carparts.com\/hyundai\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Hyundai\">Hyundai<\/a>, and <a href=\"https:\/\/www.carparts.com\/toyota\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Toyota\">Toyota<\/a>, among others. Various vehicles manufactured in 1996 onwards can be affected by this DTC.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/08\/automatic-transmission-fluid-switch.png\" alt=\"automatic transmission fluid switch\" class=\"wp-image-71574\" width=\"1024\" height=\"614\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/08\/automatic-transmission-fluid-switch.png 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/08\/automatic-transmission-fluid-switch-300x180.png 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/08\/automatic-transmission-fluid-switch-768x461.png 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/08\/automatic-transmission-fluid-switch-150x90.png 150w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>Your PCM can store a P0842 code if the transmission fluid pressure sensor&rsquo;s (TFPS) input doesn&rsquo;t match the expected value stored in it.<\/figcaption><\/figure>\n\n\n\n<p>Your vehicle&rsquo;s powertrain control module (PCM) can store a P0842 code if the <a href=\"https:\/\/www.carparts.com\/automatic-transmission-oil-pressure-switch\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"transmission fluid pressure sensor&rsquo;s (TFPS)\">transmission fluid pressure sensor&rsquo;s (TFPS)<\/a> input doesn&rsquo;t match the expected value stored in the PCM. In some cases, it can also indicate mechanical issues within the transmission. The location of the &ldquo;A&rdquo; circuit varies from vehicle to vehicle. <a href=\"https:\/\/www.carparts.com\/blog\/why-you-should-always-consult-a-repair-manual\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Check your repair manual\">Check your repair manual<\/a> to find out where it is.<\/p>\n\n\n\n<p>Don&rsquo;t hesitate to troubleshoot a P0842 code because it can cause serious damage to your vehicle in the long run.<\/p>\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<p><em><strong>Note:<\/strong> The definition of code P0842 might 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 P0842 Code?<\/h2>\n\n\n\n<p>There are numerous potential causes of the issues that trigger a P0842 code. Here are a few of the most frequent causes.<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Failed or shorted TFPS sensor<\/li><li>Circuit issues, such as damaged <a href=\"https:\/\/www.carparts.com\/blog\/car-wiring\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"wires\">wires<\/a> and poor connections<\/li><li>Defective PCM<\/li><\/ul>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/08\/automotive-wiring-1024x646.jpg\" alt=\"automotive wiring\" class=\"wp-image-71572\" width=\"1024\" height=\"646\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/08\/automotive-wiring-1024x646.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/08\/automotive-wiring-300x189.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/08\/automotive-wiring-768x484.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/08\/automotive-wiring-150x95.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/08\/automotive-wiring.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>If in any case your TFPS sensor is working well despite having logged a P0842 code, check your car wiring for damaged or poor connections.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Common Symptoms of the P0842 Code?<\/h2>\n\n\n\n<p>Some codes associated with TFPS issues include P0840, P0841, P0843, and P0844. If your PCM is storing more than one DTC, you might notice some symptoms that aren&rsquo;t listed here. However, if your PCM only has a P0842 stored, you should watch out for one or more of the symptoms listed below.<\/p>\n\n\n\n<ul class=\"wp-block-list\"><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><li>Transmission doesn&rsquo;t shift properly<\/li><li>Vehicle stuck in &ldquo;limp&rdquo; mode<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P0842 Code<\/h2>\n\n\n\n<p>The diagnostic procedure can vary depending on the vehicle. You&rsquo;ll have to be skilled in auto repair to correctly identify the issues triggering this code. If you don&rsquo;t have any experience troubleshooting DTCs, we suggest consulting a mechanic before attempting a diagnosis. The following video only shows the general diagnostic procedure for a P0842 code.<\/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=\"P0842 transmission fluid pressure switch circuit low\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/Ui6Rce4Y9-8?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 P0842 Code<\/h2>\n\n\n\n<p>There are no shortcuts to troubleshooting DTCs like P0842. You&rsquo;ll need sufficient auto repair knowledge to find out the underlying causes of this code and come up with the right fix. Luckily, you&rsquo;ll find plenty of OBD-II <a href=\"https:\/\/www.carparts.com\/blog\/best-online-resources-to-help-you-learn-how-to-fix-cars\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"resources online\">resources online<\/a> to help you figure it out. There might be forum posts and technical service bulletins that address your particular DTC. We recommend getting a Chilton repair manual for reference. ALLDATA&rsquo;s single-vehicle subscription is also a great resource for beginners.<\/p>\n\n\n\n<p>If you don&rsquo;t feel confident about tinkering with your vehicle, hire a mechanic to do the repairs for you.<\/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>Is your scanner tool detecting a P0842 code? This might indicate some problems with your vehicle. P0842 is a diagnostic&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p0842-code-transmission-fluid-pressure-sensor-switch-a-circuit-low\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":71566,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_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":""},"categories":[1314],"tags":[1887],"ppma_author":[2607,2855],"class_list":{"0":"post-71336","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-automatic-transmission-oil-pressure-switch","9":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P0842 Code: Transmission Fluid Pressure Sensor \/ Switch &quot;A&quot; Circuit Low - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Get the information you need to start diagnosing and resolving the trouble code P0842 in this article. Read on for more.\" \/>\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\/p0842-code-transmission-fluid-pressure-sensor-switch-a-circuit-low\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0842 Code: Transmission Fluid Pressure Sensor \/ Switch &quot;A&quot; Circuit Low - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Get the information you need to start diagnosing and resolving the trouble code P0842 in this article. 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