{"id":18456,"date":"2022-07-15T02:22:00","date_gmt":"2022-07-15T09:22:00","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=18456"},"modified":"2024-07-19T09:27:22","modified_gmt":"2024-07-19T16:27:22","slug":"p0109-code-map-baro-sensor-circuit-intermittent","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p0109-code-map-baro-sensor-circuit-intermittent\/","title":{"rendered":"P0109 Code: MAP \/ BARO Sensor Circuit Intermittent"},"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\"> 4<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column_3ce1dc-0d > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_3ce1dc-0d > .kt-inside-inner-col,.kadence-column_3ce1dc-0d > .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_3ce1dc-0d > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_3ce1dc-0d > .kt-inside-inner-col{flex-direction:column;}.kadence-column_3ce1dc-0d > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_3ce1dc-0d > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_3ce1dc-0d{position:relative;}@media all and (max-width: 1024px){.kadence-column_3ce1dc-0d > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_3ce1dc-0d > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_3ce1dc-0d qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-3fcb85  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-55a69d\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_6fa33d-25, .wp-block-kadence-advancedheading.kt-adv-heading_6fa33d-25[data-kb-block=\"kb-adv-heading_6fa33d-25\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_6fa33d-25 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_6fa33d-25[data-kb-block=\"kb-adv-heading_6fa33d-25\"] 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_6fa33d-25 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_6fa33d-25[data-kb-block=\"kb-adv-heading_6fa33d-25\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_6fa33d-25 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_6fa33d-25\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>If your vehicle logs a P0109 trouble code, it typically means that the powertrain control module (PMC) has detected an intermittent sensor reading from the MAP or BARO sensor circuit.<\/li><li>Aside from a faulty MAP or BARO sensor, corroded, loose, or damaged wiring can cause onboard diagnostics to log a P0109 code.<\/li><li>If this code is present, your vehicle might exhibit symptoms like hesitation, decreased engine performance, and poor fuel economy.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>P0109 is one of the several engine trouble codes related to a possible fault in the manifold absolute pressure (MAP) or barometric pressure (BARO) sensor circuit.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P0109 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> (DTC) P0109 stands for &ldquo;MAP\/BARO Sensor Circuit Intermittent.&rdquo; It is triggered when a vehicle&rsquo;s PCM has detected a possible issue in the MAP sensor or <a href=\"https:\/\/www.carparts.com\/barometric-pressure-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"BARO sensor\">BARO sensor<\/a> circuit. The error code is specifically logged once the PCM perceives an intermittent sensor reading from either the MAP or BARO sensor.<\/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\/2020\/10\/man-using-scan-tool-to-diagnose-obd-code-1024x683.jpeg\" alt=\"man using scan tool to diagnose obd code\" class=\"wp-image-18457\" width=\"1024\" height=\"683\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/man-using-scan-tool-to-diagnose-obd-code-1024x683.jpeg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/man-using-scan-tool-to-diagnose-obd-code-300x200.jpeg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/man-using-scan-tool-to-diagnose-obd-code-768x512.jpeg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/man-using-scan-tool-to-diagnose-obd-code-600x400.jpeg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/man-using-scan-tool-to-diagnose-obd-code-150x100.jpeg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/man-using-scan-tool-to-diagnose-obd-code.jpeg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>Code P0109 is triggered when a vehicle&rsquo;s PCM has detected a possible issue in the MAP sensor or BARO sensor circuit.<\/figcaption><\/figure>\n\n\n\n<p>A <a href=\"https:\/\/www.carparts.com\/map-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"MAP sensor\">MAP sensor<\/a> is used to monitor engine load. Some vehicles may be equipped with a MAP sensor and a separate BARO sensor. A BARO sensor is similar to a MAP sensor, but it can detect more minute or subtle changes in atmospheric air pressure.<\/p>\n\n\n\n<p>The two sensors typically refer to the same type of sensor. The only difference is that a MAP sensor is usually connected to the manifold, while a BARO sensor is vented directly to the atmosphere. The two sensors are often integrated into a single sensor.<\/p>\n\n\n\n<p>A MAP sensor is usually supplied with a reference voltage signal, a battery ground, and one or several output signal circuits. This sensor&rsquo;s resistance level is expected to change as absolute manifold pressure changes. These changes will cause variations in the output voltage signal sent to the PCM.<\/p>\n\n\n\n<p>This data is not only used by the PCM to detect engine load but also to adjust fuel injection and ignition timing.<\/p>\n\n\n\n<p>Once the <a href=\"https:\/\/www.carparts.com\/engine-control-module\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"PCM\">PCM<\/a> detects that the input voltage is outside the manufacturer-specified range for a given amount of time, it will trigger the engine code P0109.<\/p>\n\n\n\n<p>A detailed understanding of <a href=\"https:\/\/www.carparts.com\/blog\/p0108-code-manifold-absolute-pressurebarometric-pressure-high\/#Intake_Manifold_Pressure\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"intake manifold pressure\">intake manifold pressure<\/a> can help you perform a proper DIY diagnosis and troubleshooting of code P0109.<\/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 P0109 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 Possible Causes of the P0109 Code?<\/h2>\n\n\n\n<p>Here are the possible triggers of the P0109 code:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/www.carparts.com\/blog\/how-to-check-if-your-map-sensor-is-bad\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Faulty MAP sensor\">Faulty MAP sensor<\/a><\/li><li>Open or shorted MAP or BARO circuit<\/li><li>Malfunctioning BARO sensor<\/li><li>Corroded or loose MAP\/ Baro sensor connector<\/li><li>Malfunctioning PCM<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Common Symptoms of a P0109 Code?<\/h2>\n\n\n\n<p>Here are the common symptoms of a P0109 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><a href=\"https:\/\/www.carparts.com\/blog\/car-hesitates-when-accelerating-causes-and-faq\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Engine hesitation\">Engine hesitation<\/a> (during acceleration)<\/li><li>Decreased engine performance<\/li><li>Increased fuel consumption<\/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\/2020\/10\/car-with-increased-fuel-consumption-1024x684.jpeg\" alt=\"car with increased fuel consumption\" class=\"wp-image-18458\" width=\"1024\" height=\"684\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/car-with-increased-fuel-consumption-1024x684.jpeg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/car-with-increased-fuel-consumption-300x200.jpeg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/car-with-increased-fuel-consumption-768x513.jpeg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/car-with-increased-fuel-consumption-600x400.jpeg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/car-with-increased-fuel-consumption-150x100.jpeg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/car-with-increased-fuel-consumption.jpeg 1505w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>Increased fuel consumption&nbsp;is a symptom of code P0109.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P0109 Code<\/h2>\n\n\n\n<p>It&rsquo;s not easy to diagnose a P0109 code. If you don&rsquo;t have the right tools and experience for this task, it is best to let a mechanic do the diagnostic procedures for you.<\/p>\n\n\n\n<p>However, if you&rsquo;re an experienced DIYer, and you would like to try and diagnose this code yourself, we recommend consulting 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 manuals and\/or online repair databases\">repair manuals and\/or online repair databases<\/a>. These sources can help you identify the right diagnostic procedure for your vehicle.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Fix the P0109 Code<\/h2>\n\n\n\n<p>Although the symptoms and causes of this error code may be similar in various makes and models, there is no single fix that would work for all vehicles.<\/p>\n\n\n\n<p>Remember that vehicle engines are designed and built differently by each vehicle manufacturer. This means that the appropriate repair procedures may vary per vehicle. For instance, a P0109 <a href=\"https:\/\/www.carparts.com\/barometric-pressure-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Ford\">Ford<\/a> code fix may not resolve a code P0109 on a <a href=\"https:\/\/www.carparts.com\/barometric-pressure-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Chevy\">Chevy<\/a>.<\/p>\n\n\n\n<p>Consult a vehicle repair manual before attempting to clear this code yourself. You may also subscribe to an online repair database to help you find confirmed fixes for your vehicle.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Get a Replacement MAP Sensor Without Leaving Your Home<\/h2>\n\n\n\n<p>The DTC P0109 code likely points to a faulty MAP sensor. As a result, your vehicle might feel sluggish as you drive, which is never pleasant. It&rsquo;s best to resolve DTC P0109 as soon as possible by addressing its root causes. Often, this will mean replacing malfunctioning parts. The great thing is, you can order replacement parts easily with CarParts.com.<\/p>\n\n\n\n<p>CarParts.com aims to make ordering your replacement parts online quick and simple. Our easy-to-navigate website makes choosing parts and placing an order a breeze. You can browse the available MAP sensors, narrow down which ones fit your vehicle, and proceed through our convenient and secure check out in only a few quick clicks. We&rsquo;ll deliver your new parts to your door in as fast as two business days.<\/p>\n\n\n\n<p>You don&rsquo;t need to go out to buy replacement parts to solve DTC P0109. Place an order for a new <a href=\"https:\/\/www.carparts.com\/map-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"MAP sensor\">MAP sensor<\/a> or other parts at CarParts.com instead.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Products Mentioned in this Guide<\/h2>\n\n\n\n<div class=\"reusable-productlink\">\n\n    <!-- start of editable content -->\n\n    <a href=\"https:\/\/www.carparts.com\/map-sensor\" target=\"_blank\" aria-label=\"map sensor\" rel=\"noopener\">\n        <img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/d_noimage.jpg,h_200,w_200,c_pad,f_auto,q_auto,dpr_auto,e_sharpen\/images\/rc31520001_1\" alt=\"map sensor\">\n\t<strong>MAP Sensor<\/strong>\n    <\/a>\n\n    <a href=\"https:\/\/www.carparts.com\/barometric-pressure-sensor\" target=\"_blank\" aria-label=\"barometric pressure sensor\" rel=\"noopener\">\n        <img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/d_noimage.jpg,h_200,w_200,c_pad,f_auto,q_auto,dpr_auto,e_sharpen\/images\/micx2161_1\" alt=\"barometric pressure sensor\">\n\t<strong>BARO Sensor<\/strong>\n    <\/a>\n\n    <!-- end of editable content -->\n\n<\/div>\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\"> 4<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>P0109 is one of the several engine trouble codes related to a possible fault in the manifold absolute pressure (MAP)&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p0109-code-map-baro-sensor-circuit-intermittent\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":15950,"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":[1962,55],"ppma_author":[2607,2985],"class_list":{"0":"post-18456","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-barometric-pressure-sensor","9":"tag-map-sensor","10":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P0109 Code: MAP \/ BARO Sensor Circuit Intermittent - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Are you wondering what the code P0109 means? Read on to find out its possible triggers, common symptoms, and 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\/p0109-code-map-baro-sensor-circuit-intermittent\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0109 Code: MAP \/ BARO Sensor Circuit Intermittent - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Are you wondering what the code P0109 means? Read on to find out its possible triggers, common symptoms, and more.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/p0109-code-map-baro-sensor-circuit-intermittent\/\" \/>\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=\"2022-07-15T09:22:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-07-19T16:27:22+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/image-of-a-car-engine.jpeg\" \/>\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=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0109-code-map-baro-sensor-circuit-intermittent\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0109-code-map-baro-sensor-circuit-intermittent\\\/\"},\"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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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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