{"id":76244,"date":"2022-10-20T21:15:50","date_gmt":"2022-10-21T04:15:50","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=76244"},"modified":"2023-09-04T18:04:00","modified_gmt":"2023-09-05T01:04:00","slug":"p2078-code-intake-manifold-tuning-imt-valve-position-sensor-switch-circuit-high-bank-1","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p2078-code-intake-manifold-tuning-imt-valve-position-sensor-switch-circuit-high-bank-1\/","title":{"rendered":"P2078 Code: Intake Manifold Tuning (IMT) Valve Position Sensor\/Switch Circuit High Bank 1"},"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_767ddf-eb > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_767ddf-eb > .kt-inside-inner-col,.kadence-column_767ddf-eb > .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_767ddf-eb > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_767ddf-eb > .kt-inside-inner-col{flex-direction:column;}.kadence-column_767ddf-eb > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_767ddf-eb > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_767ddf-eb{position:relative;}@media all and (max-width: 1024px){.kadence-column_767ddf-eb > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_767ddf-eb > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_767ddf-eb qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-7bd474  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-b6273e\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_f6d09c-5f, .wp-block-kadence-advancedheading.kt-adv-heading_f6d09c-5f[data-kb-block=\"kb-adv-heading_f6d09c-5f\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_f6d09c-5f mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_f6d09c-5f[data-kb-block=\"kb-adv-heading_f6d09c-5f\"] 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_f6d09c-5f img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_f6d09c-5f[data-kb-block=\"kb-adv-heading_f6d09c-5f\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_f6d09c-5f summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_f6d09c-5f\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>Diagnostic trouble code (DTC) P2078 stands for &ldquo;Intake Manifold Tuning (IMT) Valve Position Sensor\/Switch Circuit High Bank 1.&rdquo; It&rsquo;s triggered when the powertrain control module (PCM) detects an implausible signal from the intake manifold tuning valve position sensor, which is in charge of providing the PCM with information about the tuning valve&rsquo;s position.<\/li><li>Possible causes of the P2078 code include a faulty intake manifold tuning valve position sensor, circuit problems, a faulty intake manifold tuning valve, and a PCM that&rsquo;s faulty or in need of a software update.<\/li><li>Symptoms of the P2078 code include an illuminated check engine light, reduced engine performance, poor fuel efficiency, and rough idle.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Some vehicles are equipped with an intake manifold tuning valve system that opens and closes one or more flaps in the intake manifold. The tuning valve allows more air to enter the engine when needed. When your engine&rsquo;s intake manifold tuning valve or its sensors develops a problem, the P2078 code or other related <a href=\"https:\/\/www.carparts.com\/blog\/search-obd2-codes-list\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"trouble codes\">trouble codes<\/a> could trigger.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P2078 Code Mean?<\/h2>\n\n\n\n<p>Diagnostic trouble code (DTC) P2078 is defined as Intake Manifold Tuning (IMT) Valve Position Sensor\/Switch Circuit High Bank 1. Your vehicle&rsquo;s powertrain control module (PCM) will trigger the 2078 code when it detects an implausible signal from the intake manifold tuning valve position sensor. This sensor is responsible for giving the PCM information about the tuning valve&rsquo;s position.<\/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\/automotive-intake-manifold-runner-valve-1024x614.jpg\" alt=\"automotive intake manifold runner valve image\" class=\"wp-image-76428\" width=\"1024\" height=\"614\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/automotive-intake-manifold-runner-valve-1024x614.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/automotive-intake-manifold-runner-valve-300x180.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/automotive-intake-manifold-runner-valve-768x461.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/automotive-intake-manifold-runner-valve-150x90.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/automotive-intake-manifold-runner-valve.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>The PCM will trigger the 2078 code when it detects an implausible signal from the intake manifold tuning valve position sensor.<\/figcaption><\/figure>\n\n\n\n<p>The intake manifold tuning valve is responsible for regulating the airflow inside the air passages that lead to the engine. Manipulating the amount of air that enters the engine helps it achieve better performance and efficiency.<\/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 the P2078 code can differ 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 P2078 Code?<\/h2>\n\n\n\n<p>The following issues commonly cause the P2078 code:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Faulty intake manifold tuning valve position sensor<\/li><li>Circuit problems, such as a damaged <a href=\"https:\/\/www.carparts.com\/blog\/car-wiring\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"wire\">wire<\/a> or poor connection<\/li><li>Faulty intake manifold tuning valve<\/li><li>Faulty PCM or software in need of an update<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Common Symptoms of the P2078 Code?<\/h2>\n\n\n\n<p>Here are the common symptoms of the P2078 code:<\/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>Reduced engine performance<\/li><li>Poor fuel efficiency<\/li><li>Rough idle<\/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\/low-fuel-light-on-1024x683.jpg\" alt=\"low fuel light on\" class=\"wp-image-76429\" width=\"1024\" height=\"683\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/low-fuel-light-on-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/low-fuel-light-on-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/low-fuel-light-on-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/low-fuel-light-on-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/low-fuel-light-on-1200x800.jpg 1200w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/low-fuel-light-on-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/low-fuel-light-on.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>Another common symptom of the P2078 code is poor fuel efficiency.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P2078 Code<\/h2>\n\n\n\n<p>The P2078 code&rsquo;s definition implies that the intake manifold tuning valves are faulty. While this might be the case, it&rsquo;s possible that it isn&rsquo;t the source of the problem. To fix this DTC, you must correctly identify the root cause. You&rsquo;re probably going to need to do a visual inspection of and test the affected components and wiring, which can be quite challenging if you are unfamiliar with engines. You&rsquo;re also probably going to need specialized tools and knowledge to do the said tests. If you are unfamiliar with DIY repairs, we recommend consulting a trusted mechanic to properly diagnose the problem.<\/p>\n\n\n\n<p>Interested in diagnosing the P2078 code yourself? Check out the video below to learn more.<\/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=\"08 GMC Acadia P0660, P2070, P2078 IMT Valve issue\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/LLX8rA6ZA_k?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 P2078 Code<\/h2>\n\n\n\n<p>The repair process for OBD-II trouble codes can vary significantly between vehicle models because they likely have different layouts and designs. As a result, there isn&rsquo;t a single magic bullet fix that works for all DTCs. If you don&rsquo;t have much experience troubleshooting DTCs, then we recommend leaving the task to a professional.<\/p>\n\n\n\n<p>If you have the knowledge and skills for the task, then the first step to fixing the code is to properly diagnose its cause. After identifying the cause of the P2078 code, you can start consulting <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=\"online repair resources and guides\">online repair resources and guides<\/a> for possible fixes. Chilton repair manuals can be useful, but an ALLDATA DIY subscription might be better, as it provides factory repair information for other people interested in DIY repairs.<\/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>Some vehicles are equipped with an intake manifold tuning valve system that opens and closes one or more flaps in&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p2078-code-intake-manifold-tuning-imt-valve-position-sensor-switch-circuit-high-bank-1\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":76424,"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":[1862],"ppma_author":[2607,2855],"class_list":{"0":"post-76244","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-intake-manifold-runner-valve","9":"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>P2078 Code: Intake Manifold Tuning (IMT) Valve Position Sensor\/Switch Circuit High Bank 1 - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"This article will help you learn more about the definition and common causes and symptoms of the P2078 code.\" \/>\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\/p2078-code-intake-manifold-tuning-imt-valve-position-sensor-switch-circuit-high-bank-1\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P2078 Code: Intake Manifold Tuning (IMT) Valve Position Sensor\/Switch Circuit High Bank 1 - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"This article will help you learn more about the definition and common causes and symptoms of the P2078 code.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/p2078-code-intake-manifold-tuning-imt-valve-position-sensor-switch-circuit-high-bank-1\/\" \/>\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=\"2022-10-21T04:15:50+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-09-05T01:04:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/mechanic-holding-an-obd-scanner.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1500\" \/>\n\t<meta property=\"og:image:height\" content=\"1000\" \/>\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\\\/p2078-code-intake-manifold-tuning-imt-valve-position-sensor-switch-circuit-high-bank-1\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p2078-code-intake-manifold-tuning-imt-valve-position-sensor-switch-circuit-high-bank-1\\\/\"},\"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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