{"id":74646,"date":"2022-10-09T22:53:49","date_gmt":"2022-10-10T05:53:49","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=74646"},"modified":"2023-09-04T22:43:40","modified_gmt":"2023-09-05T05:43:40","slug":"p0944-code-hydraulic-pressure-unit-loss-of-pressure","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p0944-code-hydraulic-pressure-unit-loss-of-pressure\/","title":{"rendered":"P0944 Code: Hydraulic Pressure Unit Loss of Pressure"},"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_f7350a-4d > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_f7350a-4d > .kt-inside-inner-col,.kadence-column_f7350a-4d > .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_f7350a-4d > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_f7350a-4d > .kt-inside-inner-col{flex-direction:column;}.kadence-column_f7350a-4d > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_f7350a-4d > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_f7350a-4d{position:relative;}@media all and (max-width: 1024px){.kadence-column_f7350a-4d > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_f7350a-4d > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_f7350a-4d qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-50a10e  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-5fd755\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_b19b32-49, .wp-block-kadence-advancedheading.kt-adv-heading_b19b32-49[data-kb-block=\"kb-adv-heading_b19b32-49\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_b19b32-49 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_b19b32-49[data-kb-block=\"kb-adv-heading_b19b32-49\"] 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_b19b32-49 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_b19b32-49[data-kb-block=\"kb-adv-heading_b19b32-49\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_b19b32-49 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_b19b32-49\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>DTC P0944 stands for &ldquo;Hydraulic Pressure Unit Loss of Pressure.&rdquo;<\/li><li>This is a generic code that&rsquo;s logged when the PCM detects a loss of hydraulic pressure in the transmission.<\/li><li>Code P0944 is commonly caused by low transmission fluid, a faulty transmission oil pump, and a clogged transmission filter.<\/li><li>Symptoms of code P0944 include a lit check engine light and issues with transmission shifting.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Hydraulically controlled automatic transmissions\/transaxles use valves to control shift timing. These valves create other hydraulic circuit pressures inside the transmission using mainline pressure. If 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 (TCM)\">transmission control module (TCM)<\/a> detects a significant drop in hydraulic pressure, the vehicle&rsquo;s computer will register a P0944 code on a scan tool.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P0944 Code Mean?<\/h2>\n\n\n\n<p>Diagnostic trouble code (DTC) P0944 stands for &ldquo;Hydraulic Pressure Unit Loss of Pressure.&rdquo; This is a generic powertrain code that applies to select vehicles with OBD-II.<\/p>\n\n\n\n<p>The transmission <a href=\"https:\/\/www.carparts.com\/valve-body\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"valve body\">valve body<\/a> houses various valves, passages, and solenoids, which direct the flow of transmission fluid. These fluid passages can be widened to create pockets that contain steel, nylon, or rubber check balls.<\/p>\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\/10\/cross-section-of-a-transmission-assembly-1024x707.jpg\" alt=\"cross section of a transmission assembly\" class=\"wp-image-74830\" width=\"1024\" height=\"707\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/cross-section-of-a-transmission-assembly-1024x707.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/cross-section-of-a-transmission-assembly-300x207.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/cross-section-of-a-transmission-assembly-768x530.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/cross-section-of-a-transmission-assembly-150x104.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/cross-section-of-a-transmission-assembly.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>The PCM will set a P0944 code if it detects a loss of hydraulic pressure in the transmission.<\/figcaption><\/figure>\n\n\n\n<p>A transmission oil pump is used to deliver transmission fluid and pressurize the system. This pump is usually connected to the engine so that it can quickly respond to the engine&rsquo;s demands To keep the pump from creating an excessive amount of fluid pressure, the transmission uses a pressure regulator valve or a spool valve and spring combination.<\/p>\n\n\n\n<p>The vehicle&rsquo;s computer will set a P0944 code if the PCM or TCM detects a loss of hydraulic pressure in the transmission.<\/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><strong><em>Note:<\/em><\/strong><em> The definition of code P0944 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 P0944 Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/www.carparts.com\/blog\/how-to-check-automatic-transmission-fluid\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Low transmission fluid\">Low transmission fluid<\/a><\/li><li>Faulty transmission oil pump<\/li><li>Clogged or obstructed <a href=\"https:\/\/www.carparts.com\/blog\/bad-transmission-filter-symptoms-plus-faq\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"transmission filter\">transmission filter<\/a><\/li><li>Faulty pressure sensor\/switch<\/li><li>Damaged or faulty <a href=\"https:\/\/www.carparts.com\/blog\/car-wiring\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"wiring\">wiring<\/a><\/li><li>Internal transmission failure<\/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\/10\/automatic-transmission-assembly-1024x685.jpg\" alt=\"automatic transmission assembly\" class=\"wp-image-74824\" width=\"1024\" height=\"685\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/automatic-transmission-assembly-1024x685.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/automatic-transmission-assembly-300x201.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/automatic-transmission-assembly-768x514.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/automatic-transmission-assembly-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/automatic-transmission-assembly-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/automatic-transmission-assembly.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>One common cause of the P0944 code is internal transmission failure.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Common Symptoms of the P0944 Code?<\/h2>\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>Possible transmission shift issues<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P0944 Code<\/h2>\n\n\n\n<p>The P0944 code can be accompanied by other <a href=\"https:\/\/www.carparts.com\/blog\/search-obd2-codes-list\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"DTCs\">DTCs<\/a> that are related to the transmission. That means you might observe some symptoms that aren&rsquo;t listed in this article. Make sure to review your vehicle&rsquo;s repair manual to learn about your vehicle&rsquo;s parts and its potential problems. The following video can give you an idea of what the diagnostic process 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=\"2008 Ram 3500 Transmission Won't Go Into Any Gears. Codes P0700, P0944\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/9o7cXp04_fk?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<p>However, if you don&rsquo;t have the required auto repair skills to diagnose your vehicle, we recommend taking your vehicle to an expert. They can thoroughly investigate the problem causing the DTC so you don&rsquo;t have to take risks with your vehicle.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Fix the P0944 Code<\/h2>\n\n\n\n<p>There&rsquo;s no cookie-cutter solution to addressing a P0944 code. You&rsquo;ll have to take your vehicle&rsquo;s make and model into account when searching for troubleshooting tips online. For example, what might work to resolve a P0944 code for a <a href=\"https:\/\/www.carparts.com\/dodge\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Dodge\">Dodge<\/a> might not work for a <a href=\"https:\/\/www.carparts.com\/ford\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Ford\">Ford<\/a>. That&rsquo;s why we recommend looking for a Chilton repair manual. This book can help you identify the underlying problems of your vehicle&rsquo;s code to figure out the correct fix. You can also search for technical service bulletins that contain <a href=\"https:\/\/www.carparts.com\/blog\/why-you-should-always-consult-a-repair-manual\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"specific repair information\">specific repair information<\/a> from your vehicle&rsquo;s manufacturer. If your vehicle&rsquo;s problems are common, you might find some help in repair forums. However, if you want more comprehensive factory repair information for your specific vehicle, we recommend getting an ALLDATA subscription.<\/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>Hydraulically controlled automatic transmissions\/transaxles use valves to control shift timing. These valves create other hydraulic circuit pressures inside the transmission&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p0944-code-hydraulic-pressure-unit-loss-of-pressure\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":74808,"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":[],"ppma_author":[2607,2855],"class_list":{"0":"post-74646","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P0944 Code: Hydraulic Pressure Unit Loss of Pressure - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Find out what it takes to clear a P0944 from your vehicle\u2019s computer and learn more about this code. 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