{"id":76521,"date":"2022-10-25T20:35:20","date_gmt":"2022-10-26T03:35:20","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=76521"},"modified":"2023-09-29T21:01:20","modified_gmt":"2023-09-30T04:01:20","slug":"p2199-code-intake-air-temperature-sensor-1-2-correlation","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p2199-code-intake-air-temperature-sensor-1-2-correlation\/","title":{"rendered":"P2199 Code: Intake Air Temperature Sensor 1\/2 Correlation"},"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_7a2a83-81 > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_7a2a83-81 > .kt-inside-inner-col,.kadence-column_7a2a83-81 > .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_7a2a83-81 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_7a2a83-81 > .kt-inside-inner-col{flex-direction:column;}.kadence-column_7a2a83-81 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_7a2a83-81 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_7a2a83-81{position:relative;}@media all and (max-width: 1024px){.kadence-column_7a2a83-81 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_7a2a83-81 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_7a2a83-81 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-6d497a  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-ba63fc\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_2fad2b-e8, .wp-block-kadence-advancedheading.kt-adv-heading_2fad2b-e8[data-kb-block=\"kb-adv-heading_2fad2b-e8\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_2fad2b-e8 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_2fad2b-e8[data-kb-block=\"kb-adv-heading_2fad2b-e8\"] 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_2fad2b-e8 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_2fad2b-e8[data-kb-block=\"kb-adv-heading_2fad2b-e8\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_2fad2b-e8 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_2fad2b-e8\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>The diagnostic trouble code (DTC) P2199 indicates &ldquo;Intake Air Temperature Sensor 1\/2 Correlation.&rdquo;<\/li><li>The powertrain control module (PCM) will trigger the P2199 code if it detects a significant discrepancy between the voltage signals sent by different IAT sensors.<\/li><li>Common causes of the P2199 code are a faulty IAT sensor, open or shorted circuits or connectors, and a bad PCM.<\/li><li>A vehicle that sets the P2199 code can show symptoms like an illuminated check engine light, reduced engine performance, and poor fuel efficiency.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>The <a href=\"https:\/\/www.carparts.com\/iat-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"intake air temperature (IAT) sensor\">intake air temperature (IAT) sensor<\/a> plays an important role in ensuring the engine runs efficiently and smoothly. It measures the temperature of the air passing out of the air intake system into the engine. The sensor converts its readings into a voltage signal for the powertrain control module (PCM), which uses the data to adjust the amount of fuel that the injectors spray into the cylinders.<\/p>\n\n\n\n<p>The PCM will log a P2199 code if it detects a large discrepancy between the voltage signals sent by different IAT sensors.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P2199 Code Mean?<\/h2>\n\n\n\n<p>The diagnostic trouble code (DTC) P2199 indicates &ldquo;Intake Air Temperature Sensor 1\/2 Correlation.&rdquo;<\/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-iat-sensor-1024x683.jpg\" alt=\"automotive iat sensor image\" class=\"wp-image-76799\" width=\"1024\" height=\"683\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/automotive-iat-sensor-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/automotive-iat-sensor-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/automotive-iat-sensor-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/automotive-iat-sensor-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/automotive-iat-sensor-1200x800.jpg 1200w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/automotive-iat-sensor-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/automotive-iat-sensor.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>The PCM will log a P2199 code if it detects a large discrepancy between the voltage signals sent by different IAT sensors.<\/figcaption><\/figure>\n\n\n\n<p>Vehicles have more than one intake air temperature sensor, and their location may vary depending on the vehicle&rsquo;s manufacturer. Most IAT sensors can be found in the air intake pipe or air filter housing. A different design is built into the housing of 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>.<\/p>\n\n\n\n<p>No matter the particular design, most IAT sensors have a thermal resistor that juts into the air inlet. Intake air flows across the resistor.<\/p>\n\n\n\n<p>Higher temperatures lower the resistor&rsquo;s electrical resistance, which makes the circuit&rsquo;s voltage rise. Conversely, lower temperatures increase the resistance of the IAT sensor. This lowers the voltage in the circuit.<\/p>\n\n\n\n<p>The PCM interprets these changes in signal voltage as shifts in the temperature of the intake air. It adjusts the fuel intake to compensate for cold or hot air.<\/p>\n\n\n\n<p>Furthermore, the PCM regularly compares the voltage signals sent by the IAT sensors to make sure both devices are working. If the discrepancies between the two signals exceed the maximum threshold, the PCM will set the generic code P2199.<\/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 code P2199 can differ according to the vehicle manufacturer. Check 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 P2199 Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>Faulty IAT sensor<\/li><li>Open or shorted circuits or connectors<\/li><li>Bad PCM<\/li><li>Programming error in the PCM<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Common Symptoms of P2199 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>Reduced engine performance<\/li><li>Poor fuel efficiency<\/li><li><a href=\"https:\/\/www.carparts.com\/blog\/car-shuts-off-while-driving-causes-what-to-do\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Engine hesitates while speeding up\">Engine hesitates while speeding up<\/a><\/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\/car-speedometer-and-tachometer-1024x683.jpg\" alt=\"close up shot of a car speedometer and a tachometer\" class=\"wp-image-76803\" width=\"1024\" height=\"683\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/car-speedometer-and-tachometer-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/car-speedometer-and-tachometer-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/car-speedometer-and-tachometer-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/car-speedometer-and-tachometer-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/car-speedometer-and-tachometer-1200x800.jpg 1200w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/car-speedometer-and-tachometer-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/car-speedometer-and-tachometer.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>Your vehicle&rsquo;s engine might hesitate while speeding up if it has a logged P2199 code.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P2199 Code<\/h2>\n\n\n\n<p>The P2199 code is a generic code that can register on vehicles of various makes and models. Its causes and symptoms can vary between vehicles, so there isn&rsquo;t a single diagnostic approach that will work for every instance of the <a href=\"https:\/\/www.carparts.com\/blog\/search-obd2-codes-list\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"trouble code\">trouble code<\/a>.<\/p>\n\n\n\n<p>You can run diagnostic tests on the intake air temperature sensor if you have the relevant experience and tools to perform DIY auto repair. Otherwise, it&rsquo;s recommended to bring your vehicle to a professional mechanic.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Fix the P2199 Code<\/h2>\n\n\n\n<p>To fix the P2199 code yourself, you will need appropriate tools and knowledge in DIY car repair. Not everyone has both, so they generally bring their vehicle to an auto service center they trust.<\/p>\n\n\n\n<p>For DIYers with advanced technical knowledge and hands-on experience who prefer to test and replace their vehicle&rsquo;s IAT sensor on their own, it&rsquo;s a good idea to consult the relevant <a href=\"https:\/\/www.carparts.com\/blog\/why-you-should-always-consult-a-repair-manual\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"repair manual or check an online repair database\">repair manual or check an online repair database<\/a>.<\/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>The intake air temperature (IAT) sensor plays an important role in ensuring the engine runs efficiently and smoothly. It measures&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p2199-code-intake-air-temperature-sensor-1-2-correlation\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":76781,"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":[1609],"ppma_author":[2607],"class_list":{"0":"post-76521","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 v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P2199 Code: Intake Air Temperature Sensor 1\/2 Correlation - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Identify the P2199 code, its possible causes, and the common symptoms associated with it. 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