{"id":45978,"date":"2021-11-16T00:07:05","date_gmt":"2021-11-16T08:07:05","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=45978"},"modified":"2024-08-19T23:44:41","modified_gmt":"2024-08-20T06:44:41","slug":"p2279-code-intake-air-system-leak","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p2279-code-intake-air-system-leak\/","title":{"rendered":"P2279 Code: Intake Air System Leak"},"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-column45978_28b7b3-2b > .kt-inside-inner-col,.kadence-column45978_28b7b3-2b > .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-column45978_28b7b3-2b > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column45978_28b7b3-2b > .kt-inside-inner-col{flex-direction:column;}.kadence-column45978_28b7b3-2b > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column45978_28b7b3-2b > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column45978_28b7b3-2b{position:relative;}@media all and (max-width: 1024px){.kadence-column45978_28b7b3-2b > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column45978_28b7b3-2b > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column45978_28b7b3-2b inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-5f88d0  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-03c4d4\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading45978_94380c-f3, .wp-block-kadence-advancedheading.kt-adv-heading45978_94380c-f3[data-kb-block=\"kb-adv-heading45978_94380c-f3\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading45978_94380c-f3 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading45978_94380c-f3[data-kb-block=\"kb-adv-heading45978_94380c-f3\"] 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-heading45978_94380c-f3 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading45978_94380c-f3[data-kb-block=\"kb-adv-heading45978_94380c-f3\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading45978_94380c-f3 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading45978_94380c-f3\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Diagnostic trouble code (DTC) P2279 stands for &ldquo;intake air system leak.&rdquo; The code flashes when the powertrain control module (PCM) detects a leak using the mass air flow sensor (MAF), air intake temperature sensor, and oxygen sensor.<\/li>\n\n\n\n<li>Common causes of the P2279 code include a leak in the engine-side air duct, a disconnected or broken vacuum hose, and a faulty fuel injector seal.<\/li>\n\n\n\n<li>The common symptoms of code P2279 include engine-related problems like stalling, rough or inconsistent idle, and a lack of power.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>A <a href=\"https:\/\/www.carparts.com\/blog\/check-engine-light-flashing\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"check engine light\">check engine light<\/a> can be caused by many different issues in your vehicle. If you plug in a scan tool and get a P2279 code, it could mean that your Powertrain Control Module (PCM) is detecting that there&rsquo;s an air leak somewhere in your vehicle&rsquo;s engine.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P2279 Code Mean?<\/h2>\n\n\n\n<p>The P2279 code means &ldquo;intake air system leak.&rdquo; The leak is detected by the PCM using the <a href=\"https:\/\/www.carparts.com\/mass-air-flow-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"mass air flow sensor\">mass air flow sensor<\/a> (MAF), <a href=\"https:\/\/www.carparts.com\/iat-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"air intake temperature sensor\">air intake temperature sensor<\/a>, and <a href=\"https:\/\/www.carparts.com\/oxygen-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"oxygen sensor\">oxygen sensor<\/a>. These sensors collectively give the PCM information on how much air is entering and exiting your vehicle&rsquo;s engine. Your PCM can determine that there is a leak if these sensor&rsquo;s readings are outside of their expected range. This is what causes the P2279 code to be triggered.&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/obd-ii-scanner-1024x683.jpg\" alt=\"obd ii scanner\" class=\"wp-image-46008\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/obd-ii-scanner-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/obd-ii-scanner-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/obd-ii-scanner-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/obd-ii-scanner-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/obd-ii-scanner-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/obd-ii-scanner.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">The P2279 code means that your car&rsquo;s PCM detects an intake air system leak.<\/figcaption><\/figure>\n\n\n\n<p>The PCM needs an accurate estimate of how much air is entering the engine so that it can determine the <a href=\"https:\/\/www.carparts.com\/blog\/what-is-a-good-air-fuel-ratio-chart-included\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"correct air to fuel ratio\">correct air to fuel ratio<\/a> and ignition timing needed for a specific situation. Different environments like high altitudes and terrains like hills require the PCM to constantly change the air to fuel ratio and ignition timing to make the engine run efficiently. If there is a leak, then its estimate is inaccurate, which can compromise the PCM&rsquo;s ability to make the engine run efficiently.&nbsp;<\/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 P2279 code may have a different definition depending on your vehicle manufacturer. Consult the appropriate repair manual or repair database for the code&rsquo;s exact definition.<\/em><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Possible Causes of the P2279 Code?&nbsp;<\/h2>\n\n\n\n<p>Since the code most likely means that there&rsquo;s a leak in the intake system, then you should determine where it&rsquo;s happening. The air leak can&rsquo;t occur in the air filter or in the hoses that lead up to the MAF because the PCM doesn&rsquo;t monitor these parts. The leak is occurring after the MAF, which means that it could be any part connected to the intake manifold. The leak could also come from the throttle body or other engine parts.&nbsp;<\/p>\n\n\n\n<p>Other causes of the P2279 code include:&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A leak in the engine-side air duct<\/li>\n\n\n\n<li>A disconnected or broken <a href=\"https:\/\/www.carparts.com\/vacuum-hose\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"vacuum hose\">vacuum hose<\/a><\/li>\n\n\n\n<li>A faulty <a href=\"https:\/\/www.carparts.com\/fuel-injector-seal\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"fuel injector seal\">fuel injector seal<\/a><\/li>\n\n\n\n<li>Leaky <a href=\"https:\/\/www.carparts.com\/brake-booster-vacuum-hose\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"brake booster vacuum hose\">brake booster vacuum hose<\/a><\/li>\n\n\n\n<li>Intake air temperature sensor leak<\/li>\n\n\n\n<li>Incorrect camshaft timing<\/li>\n\n\n\n<li>PCV valve leak<\/li>\n\n\n\n<li>PCV hose leak<\/li>\n\n\n\n<li>Purge line leak<\/li>\n\n\n\n<li>Throttle body or throttle body gasket leak<\/li>\n\n\n\n<li>Intake manifold or manifold gasket leak<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"884\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/car-iat-sensor-1024x884.jpg\" alt=\"car iat sensor\" class=\"wp-image-46009\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/car-iat-sensor-1024x884.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/car-iat-sensor-300x259.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/car-iat-sensor-768x663.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/car-iat-sensor-150x130.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/car-iat-sensor.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">An intake air temperature sensor leak can trigger the code P2279.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Common Symptoms of the P2279 Code?&nbsp;<\/h2>\n\n\n\n<p>P2279 code symptoms are typically engine-related. These include your vehicle stalling, having a rough or inconsistent idle, having a lack of power, and dead spots on the throttle during acceleration. You might even hear the sound of leaking air inside your engine. The issues triggering the P2279 code can even cause less braking power, as some vehicles have vacuum brake boosters that rely on vacuum pressure found in the <a href=\"https:\/\/www.carparts.com\/intake-manifold\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"intake manifold\">intake manifold<\/a>.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose P2279 Code&nbsp;<\/h2>\n\n\n\n<p>One of the telltale symptoms of the P2279 code is the sound of leaking air inside your vehicle&rsquo;s engine. But sometimes the leaks can be difficult to identify, since they could be hidden deep inside your engine. Consult a trusted mechanic to get a proper diagnosis. There are also many <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 resources\">online resources<\/a> where you can learn about the troubleshooting process.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Fix P2279 Code<\/h2>\n\n\n\n<p>After you&rsquo;ve identified the P2279 code using a scan tool, there are many possible solutions for this issue. Fixes will vary based on the faulty component. The first step is to correctly diagnose the faulty part before you repair or replace any component. All vehicles are different. That&rsquo;s why you should also consult your vehicle&rsquo;s <a href=\"https:\/\/www.carparts.com\/blog\/why-you-should-always-consult-a-repair-manual\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"repair manual\">repair manual<\/a> when it comes to troubleshooting and repairing diagnostic codes. There are also online databases that can help you find a possible solution.<\/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>A check engine light can be caused by many different issues in your vehicle. If you plug in a scan&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p2279-code-intake-air-system-leak\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":46007,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":true,"_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":[1609],"ppma_author":[2607,2985],"class_list":{"0":"post-45978","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-iat-sensor","9":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P2279 Code: Intake Air System Leak - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"The P2279 code is caused by an air leak somewhere in your engine. 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