{"id":72045,"date":"2022-09-08T23:47:38","date_gmt":"2022-09-09T06:47:38","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=72045"},"modified":"2023-10-03T17:36:24","modified_gmt":"2023-10-04T00:36:24","slug":"p0778-code-pressure-control-solenoid-b-electrical","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p0778-code-pressure-control-solenoid-b-electrical\/","title":{"rendered":"P0778 Code: Pressure Control Solenoid \u201cB\u201d Electrical"},"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_8ac413-00 > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_8ac413-00 > .kt-inside-inner-col,.kadence-column_8ac413-00 > .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_8ac413-00 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_8ac413-00 > .kt-inside-inner-col{flex-direction:column;}.kadence-column_8ac413-00 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_8ac413-00 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_8ac413-00{position:relative;}@media all and (max-width: 1024px){.kadence-column_8ac413-00 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_8ac413-00 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_8ac413-00 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-2ecfed  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-1e0d22\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_fde9c7-48, .wp-block-kadence-advancedheading.kt-adv-heading_fde9c7-48[data-kb-block=\"kb-adv-heading_fde9c7-48\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_fde9c7-48 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_fde9c7-48[data-kb-block=\"kb-adv-heading_fde9c7-48\"] 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_fde9c7-48 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_fde9c7-48[data-kb-block=\"kb-adv-heading_fde9c7-48\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_fde9c7-48 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_fde9c7-48\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>The powertrain control module will log a P0778 trouble code if it detects a problem with the pressure control solenoid.<\/li><li>Low transmission fluid levels, a faulty pressure control solenoid, and internal transmission failure can cause the engine computer to log a P0778 code.<\/li><li>Activated limp mode, an overheating transmission, and poor fuel economy are common symptoms associated with a P0778 trouble code.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p><a href=\"https:\/\/www.carparts.com\/blog\/a-short-course-on-automatic-transmissions\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Electronic automatic transmission\">Electronic automatic transmission<\/a> (AT) vehicles rely on computer-controlled solenoids such as the pressure control solenoid to regulate hydraulic system pressure. This solenoid is also used by the <a href=\"https:\/\/www.carparts.com\/engine-control-module\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"powertrain control module\">powertrain control module<\/a> (PCM) to help achieve the correct timing and feel for transmission shifting. If the PCM notices that the pressure control solenoid is not performing as it should, it will log a P0778 code.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P0778 Code Mean?<\/h2>\n\n\n\n<p><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> P0778 stands for &ldquo;Pressure Control Solenoid &lsquo;B&rsquo; Electrical.&rdquo;<\/p>\n\n\n\n<p>The <a href=\"https:\/\/www.carparts.com\/automatic-transmission-pressure-control-solenoid\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"pressure control solenoid\">pressure control solenoid<\/a> determines the position of the pressure regulator valve, which is the part that controls the fluid pressure built up by the pump. Using pulse-width modulation, the pressure control solenoid pushes against an internal valve, opening or closing the hydraulic circuit, depending on the command given by the PCM.<\/p>\n\n\n\n<p>The pressure control solenoid also ensures that the clutch packs in the transmission can provide the necessary gear ratios. An issue with the pressure control solenoid can cause on-board diagnostics (OBD) to log a P0778 code.<\/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\/09\/replacement-automatic-transmission-pressure-control-solenoid-1024x602.jpg\" alt=\"replacement automatic transmission pressure control solenoid\" class=\"wp-image-72756\" width=\"1024\" height=\"602\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/replacement-automatic-transmission-pressure-control-solenoid-1024x602.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/replacement-automatic-transmission-pressure-control-solenoid-300x176.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/replacement-automatic-transmission-pressure-control-solenoid-768x452.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/replacement-automatic-transmission-pressure-control-solenoid-1536x904.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/replacement-automatic-transmission-pressure-control-solenoid-150x88.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/replacement-automatic-transmission-pressure-control-solenoid.jpg 1700w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>The pressure control solenoid determines the position of the pressure regulator valve, which is the part that controls the fluid pressure built up by the pump.<\/figcaption><\/figure>\n\n\n\n<p><strong><em>Note:<\/em><\/strong><em> The definition of <\/em><em>code P0778<\/em><em> 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 P0778 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 level\">Low transmission fluid level<\/a><\/li><li>Faulty pressure control solenoid<\/li><li>Defective transmission control module<\/li><li>Internal transmission failure<\/li><li><a href=\"https:\/\/www.carparts.com\/blog\/bad-transmission-filter-symptoms-plus-faq\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Clogged or dirty transmission filter\">Clogged or dirty transmission filter<\/a><\/li><li>Wiring issues (e.g., corroded connector)<\/li><li><a href=\"https:\/\/www.carparts.com\/blog\/transmission-valve-body-what-it-is-how-it-works-and-more\/#Symptoms_of_a_Bad_Transmission_Valve_Body\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Valve body problems\">Valve body problems<\/a><\/li><\/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 P0778 Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>Slipping transmission<\/li><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>Poor fuel economy<\/li><li>Vehicle enters <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><li><a href=\"https:\/\/www.carparts.com\/blog\/what-damage-to-expect-from-an-overheating-car\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Overheating transmission\">Overheating transmission<\/a><\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P0778 Code<\/h2>\n\n\n\n<p>DTC P0778 is a generic powertrain code that can be logged in vehicles with an OBD-II system. While this might be the case, keep in mind that the steps for diagnosis and repair can vary, depending on vehicle specifications.<\/p>\n\n\n\n<p>If you&rsquo;re not familiar with the process of diagnosing trouble codes, it might be best to leave the job to the pros. Otherwise, you can go ahead and do it yourself. Here is a video you can watch to get an idea of what the process usually involves.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-4-3 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Transmission Pressure Control Solenoid (PCS)\" width=\"500\" height=\"375\" src=\"https:\/\/www.youtube.com\/embed\/2UAeYUtc1hA?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 P0778 Code<\/h2>\n\n\n\n<p>Attempting to fix a P0778 code can be tricky without the right tools and technical knowledge. Under these circumstances, it might be best to bring your vehicle to the nearest repair shop and have a trained professional do the job for you. This will ensure that all steps and protocols are followed correctly.<\/p>\n\n\n\n<p>But if you&rsquo;ve had your fair share of resolving DTCs on your own, then you probably know that there&rsquo;s no magic bullet that works for all vehicles. So make sure you&rsquo;re equipped with the <a href=\"https:\/\/www.carparts.com\/blog\/why-you-should-always-consult-a-repair-manual\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"right guides\">right guides<\/a> before proceeding. Manuals like those from Chilton or an ALLDATA subscription contain vehicle-specific repair information, so you might want to check those out before working on your daily driver.<\/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>Electronic automatic transmission (AT) vehicles rely on computer-controlled solenoids such as the pressure control solenoid to regulate hydraulic system pressure&#8230;. <a href=\"https:\/\/www.carparts.com\/blog\/p0778-code-pressure-control-solenoid-b-electrical\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":72755,"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":[1385,3539,1323,3168],"ppma_author":[2607,2855],"class_list":{"0":"post-72045","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-filter","9":"tag-automatic-transmission-pressure-control-solenoid","10":"tag-engine-control-module-2","11":"tag-valve-body","12":"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>P0778 Code: Pressure Control Solenoid \u201cB\u201d Electrical - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Did your car recently log a code P0778? Find out the meaning behind this trouble code and the possible causes that could have triggered 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\/p0778-code-pressure-control-solenoid-b-electrical\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0778 Code: Pressure Control Solenoid \u201cB\u201d Electrical - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Did your car recently log a code P0778? Find out the meaning behind this trouble code and the possible causes that could have triggered it.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/p0778-code-pressure-control-solenoid-b-electrical\/\" \/>\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=\"2022-09-09T06:47:38+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-10-04T00:36:24+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/transmission-pressure-control-solenoid-featured-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=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0778-code-pressure-control-solenoid-b-electrical\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0778-code-pressure-control-solenoid-b-electrical\\\/\"},\"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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