{"id":69995,"date":"2022-06-20T20:53:17","date_gmt":"2022-06-21T03:53:17","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=69995"},"modified":"2026-04-11T02:24:09","modified_gmt":"2026-04-11T09:24:09","slug":"what-does-an-egr-valve-do","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/what-does-an-egr-valve-do\/","title":{"rendered":"What Does an EGR Valve Do?"},"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\"> 5<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column69995_c996b5-4a > .kt-inside-inner-col,.kadence-column69995_c996b5-4a > .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-column69995_c996b5-4a > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column69995_c996b5-4a > .kt-inside-inner-col{flex-direction:column;}.kadence-column69995_c996b5-4a > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column69995_c996b5-4a > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column69995_c996b5-4a{position:relative;}@media all and (max-width: 1024px){.kadence-column69995_c996b5-4a > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column69995_c996b5-4a > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column69995_c996b5-4a inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-578cc6  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-44e3fa\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading69995_3bf533-3f, .wp-block-kadence-advancedheading.kt-adv-heading69995_3bf533-3f[data-kb-block=\"kb-adv-heading69995_3bf533-3f\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading69995_3bf533-3f mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading69995_3bf533-3f[data-kb-block=\"kb-adv-heading69995_3bf533-3f\"] 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-heading69995_3bf533-3f img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading69995_3bf533-3f[data-kb-block=\"kb-adv-heading69995_3bf533-3f\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading69995_3bf533-3f summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading69995_3bf533-3f\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>An exhaust gas recirculation (EGR) system lowers NOx levels and controls detonation, which is a spark knock or ping that can cause uncontrolled combustion due to high pressure and extreme heat.<\/strong><\/li>\n\n\n\n<li>A typical EGR valve opens to let in a small amount of exhaust gas (usually between 5% and 10%) into the intake manifold, which lowers the combustion temperatures and NOx emissions.<\/li>\n\n\n\n<li>Over time, an excessive buildup of carbon deposits can cause the EGR valve to get stuck and block the passages, preventing exhaust gas from getting recirculated.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Several parts of the engine work together to ensure your vehicle runs smoothly. Aside from the parts that help your daily driver perform as it should, there are also parts that aim to lessen the harmful gasses exiting your tailpipe. One such part is the exhaust gas recirculation (EGR) valve.<\/p>\n\n\n\n<p>The EGR valve is a part of the EGR system that helps reduce nitrogen oxide (NOx) emissions by letting a small percentage of exhaust gas re-enter the engine. From there, NOx emissions are diluted, leading to a cleaner and more efficient exhaust. The EGR valve is typically controlled 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) on modern vehicles.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the EGR System Do?<\/h2>\n\n\n\n<p>Exhaust gas recirculation system lowers NOx levels and controls detonation.<\/p>\n\n\n\n<p>Detonation is a spark knock or ping that can cause uncontrolled combustion due to high pressure and extreme heat.<\/p>\n\n\n\n<p>The EGR system can also help produce better ignition timing to increase power and efficiency.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How Does an EGR Valve Work?<\/h2>\n\n\n\n<p>A typical EGR valve opens at speeds above idle on a warm engine using a DC stepper motor and worm gear. When the valve opens, a small amount of exhaust gas (usually between 5% and 10%) enters the intake manifold, which lowers the combustion temperatures and NOx emissions.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"682\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/06\/Automotive-Exhaust-Gas-Recirculation-1024x682.jpg\" alt=\"Automotive Exhaust Gas Recirculation\" class=\"wp-image-70004\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/06\/Automotive-Exhaust-Gas-Recirculation-1024x682.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/06\/Automotive-Exhaust-Gas-Recirculation-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/06\/Automotive-Exhaust-Gas-Recirculation-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/06\/Automotive-Exhaust-Gas-Recirculation-1536x1024.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/06\/Automotive-Exhaust-Gas-Recirculation-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/06\/Automotive-Exhaust-Gas-Recirculation-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/06\/Automotive-Exhaust-Gas-Recirculation.jpg 1700w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">While almost all vehicles are equipped with an EGR system, many vehicles are capable of reducing harmful emissions even without an EGR valve.<\/figcaption><\/figure>\n\n\n\n<p>The EGR valve controls the flow of exhaust gases in different ways.<\/p>\n\n\n\n<p>For example, in V-type engines, the EGR system sources exhaust gas primarily from the intake manifold crossover.<\/p>\n\n\n\n<p>The exhaust crossover connects to the EGR valve through a cast passage that lets the valve route exhaust gas to the manifold openings.<\/p>\n\n\n\n<p>Meanwhile, for inline-type engines, the EGR valve relies on an external tube to carry exhaust gas.<\/p>\n\n\n\n<p>This tube is long enough to cool the gas before it enters the EGR valve.<\/p>\n\n\n\n<p>While almost all vehicles are equipped with an EGR system, many vehicles are capable of reducing harmful emissions even without an EGR valve. These vehicles rely on the efficiency of computer-controlled fuel injection.<\/p>\n\n\n\n<p>Engines without an EGR system have variable valve timing (VVT) that closes the exhaust valve sooner than normal. This process also traps some exhaust gas in the cylinder the same way the EGR valve does.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Types of EGR Valves<\/h2>\n\n\n\n<p>EGR valves come in different types, including positive and negative back pressure types, digital, and linear.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Positive and Negative Back Pressure EGR Valves<\/h3>\n\n\n\n<p>Positive and negative back pressure EGR valves are typically found on older engines that bleed off any applied vacuum.<\/p>\n\n\n\n<p>A positive back pressure valve does not open without enough backpressure. Meanwhile, a negative back pressure EGR valve reacts to a low-pressure area by closing a small internal valve.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Digital EGR Valves<\/h3>\n\n\n\n<p>A digital EGR valve uses three solenoids that open three valves in different combinations. This type of EGR valve is computer-controlled.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Linear EGR Valves<\/h3>\n\n\n\n<p>A linear EGR valve regulates exhaust gas flow by using a pulse-width modulated solenoid.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Causes an EGR Valve to Fail?<\/h2>\n\n\n\n<p>A clogged EGR valve is a common problem in vehicles with an EGR system. An excessive buildup of carbon deposits can cause the valve to get stuck and block the passages, preventing exhaust gas from getting recirculated. In some cases, a clogged EGR valve doesn&rsquo;t require a replacement.<\/p>\n\n\n\n<p>To know whether or not your EGR valve can still be used, have a certified mechanic test it out. But if you&rsquo;re a seasoned DIYer, you can <a href=\"https:\/\/www.carparts.com\/blog\/bad-egr-valve-common-symptoms-and-testing-procedure\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"test your EGR valve\">test your EGR valve<\/a> on your own, provided that you have the right tools and manual.<\/p>\n\n\n\n<div class=\"rsi-card\">\n  <div class=\"rsi-thumb\">\n    <img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/d_noimage.jpg\/b_white\/e_sharpen,e_auto_brightness,e_auto_contrast\/f_auto\/q_auto:eco,dpr_auto\/w_873,h_873,c_pad\/images\/jra50920001_1\">\n  <\/div>\n  <div class=\"rsi-info\">\n    <span class=\"rsi-title\">Before You Order an EGR Valve, Build the One-Job Order Sheet<\/span>\n    <span class=\"rsi-desc\">Build the right EGR valve the first time by matching your cart to the job scope and checking the original valve's condition.<\/span>\n    <a href=\"https:\/\/www.carparts.com\/blog\/before-you-order-an-egr-valve-build-the-one-job-order-sheet-quickref\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Discover Your Options\">Discover Your Options<\/a>\n  <\/div>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">Can You Drive a Car With a Bad EGR Valve?<\/h2>\n\n\n\n<p>In most cases, your car will continue to run with a bad EGR valve. However, performance issues like rough idling and poor acceleration will probably make your ride an unpleasant one. Other than that, your vehicle will also produce too much NOx, which can cause it to fail the emissions test.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Happens When You Get an EGR Delete?<\/h2>\n\n\n\n<p>An EGR delete gets rid of the EGR system. Some aftermarket performance kit lets you remove the EGR valve to prevent exhaust gas from being routed back into the engine.<\/p>\n\n\n\n<p>The benefits of deleting the EGR system include a boost in horsepower, better fuel economy, longer engine life, and reduced engine temperature, among others.<\/p>\n\n\n\n<p>But if the engine is built to work with an EGR system, getting rid of it might result in engine knocks, performance problems, and other issues.<\/p>\n\n\n\n<p>So if you&rsquo;re thinking about getting an EGR delete, it&rsquo;s best to consult a professional before proceeding.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How Much Does It Cost to Replace the EGR Valve<\/h2>\n\n\n\n<p>A <a href=\"https:\/\/www.carparts.com\/egr-valve\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"replacement EGR valve\">replacement EGR valve<\/a> can cost anywhere between $200 and $300, depending on factors like the part&rsquo;s brand and your vehicle&rsquo;s specifications. Labor costs to install the new EGR valve can range from $100 to $500. The exact cost of the repair will depend on a variety of factors, such as the type of vehicle you have and the shop you choose.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Shopping for a Replacement EGR Valve<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"602\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/06\/different-kinds-of-car-egr-valve-1024x602.jpg\" alt=\"different kinds of car egr valve\" class=\"wp-image-70005\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/06\/different-kinds-of-car-egr-valve-1024x602.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/06\/different-kinds-of-car-egr-valve-300x176.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/06\/different-kinds-of-car-egr-valve-768x452.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/06\/different-kinds-of-car-egr-valve-1536x904.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/06\/different-kinds-of-car-egr-valve-150x88.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/06\/different-kinds-of-car-egr-valve.jpg 1700w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">When shopping for a replacement EGR valve, always keep your vehicle&rsquo;s specifications in mind.<\/figcaption><\/figure>\n\n\n\n<p>When shopping for a replacement EGR valve, always keep your vehicle&rsquo;s specifications in mind. Knowing your vehicle&rsquo;s year, make, and model is crucial in finding a direct-fit replacement for your old EGR valve.<\/p>\n\n\n\n<p>You should also consider whether you&rsquo;re going to buy an original equipment (OE) or aftermarket EGR valve. Both variants are manufactured using the same heavy-duty materials. They also passed the same quality control standards.<\/p>\n\n\n\n<p>The only difference is that OE EGR valves are pricier than the aftermarket ones because they carry the automaker&rsquo;s brand name. So if you&rsquo;re looking for a cost-effective way to repair your vehicle, you might want to go the aftermarket route.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Where to Find a Top-Notch EGR Valve Replacement<\/h2>\n\n\n\n<p>CarParts.com offers a wide selection of OE-grade EGR valve replacements for various makes and models&#19968;including yours! All our products follow OE specifications and pass strict quality checks, so you&rsquo;re sure to find an EGR valve that&rsquo;s built to last. All you have to do is use our vehicle selector, and you&rsquo;ll find what you need in a matter of minutes.<\/p>\n\n\n\n<p>We ship from strategically located warehouses across the US. Order today, and we&rsquo;ll deliver the parts you need straight to your doorstep in as fast as two business days. All our EGR valves also come with a low-price guarantee to help you get your daily driver back into shape without breaking the bank for your repairs.<\/p>\n\n\n\n<script type=\"application\/ld+json\">\n    {\n        \"@context\": \"https:\/\/schema.org\",\n        \"@type\": \"QAPage\",\n        \"mainEntity\": {\n            \"@type\": \"Question\",\n            \"name\": \"What Does an EGR Valve Do?\",\n            \"text\": \"What Does an EGR Valve Do?\",\n            \"answerCount\": 1,\n            \"upvoteCount\": 0,\n            \"dateCreated\": \"2022-06-21T03:53:17Z\",\n            \"dateModified\": \"2023-05-04T02:45:35Z\",\n            \"author\": {\n                \"@type\": \"Person\",\n                \"name\": \"A user\"\n            },\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The EGR valve is a part of the EGR system that helps reduce nitrogen oxide (NOx) emissions by letting a small percentage of exhaust gas re-enter the engine. From there, NOx emissions are diluted, leading to a cleaner and more efficient exhaust. The EGR valve is typically controlled by the powertrain control module (PCM) on modern vehicles.\",\n                \"upvoteCount\": 0,\n                \"url\": \"https:\/\/www.carparts.com\/blog\/what-does-an-egr-valve-do\/\",\n                \"dateCreated\": \"2022-06-20T20:53:00Z\",\n               \"author\": [{\n                    \"@type\": \"Person\",\n                    \"name\": \"William Guzenski, ASE Certified Master Automobile Technician\"\n                  },\n                  {\n                    \"@type\": \"Person\",\n                    \"name\": \"CarParts.com Research Team\"\n                }]\n            }\n        }\n    }\n<\/script>\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\"> 5<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>Several parts of the engine work together to ensure your vehicle runs smoothly. Aside from the parts that help your&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/what-does-an-egr-valve-do\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":1651,"featured_media":70003,"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":"dateModified 2023-05-04T024535Z","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[52,3750],"tags":[1232],"ppma_author":[2607,2855],"class_list":{"0":"post-69995","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-diy","8":"category-exhaust-system","9":"tag-egr-valve-2","10":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What Does an EGR Valve Do? - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"The EGR valve performs an important role in regulating exhaust emissions. Read all about it here.\" \/>\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\/what-does-an-egr-valve-do\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What Does an EGR Valve Do? - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"The EGR valve performs an important role in regulating exhaust emissions. Read all about it here.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/what-does-an-egr-valve-do\/\" \/>\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:author\" content=\"https:\/\/www.facebook.com\/carpartscom\" \/>\n<meta property=\"article:published_time\" content=\"2022-06-21T03:53:17+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-11T09:24:09+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/06\/car-egr-valve-exposed-scaled.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2048\" \/>\n\t<meta property=\"og:image:height\" content=\"1420\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"CarParts.com Research Team, William Guzenski, ASE Certified Master Automobile Technician\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@https:\/\/twitter.com\/CarPartscom\" \/>\n<meta name=\"twitter:site\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"CarParts.com Research Team\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/what-does-an-egr-valve-do\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/what-does-an-egr-valve-do\\\/\"},\"author\":[{\"@type\":\"Person\",\"$id\":\"1651\",\"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. Guided by CarParts.com&#039;s thorough editorial process, our team strives to produce guides and resources DIYers and casual car owners can trust.\",\"knowsAbout\":\"Auto Repair, Car Maintenance, Auto Parts, Car Reviews\",\"publishingPrinciples\":\"\\\/blog\\\/our-team\\\/\",\"url\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/author\\\/thecpteam\\\/\",\"sameAs\":\"https:\\\/\\\/www.facebook.com\\\/carpartscom, https:\\\/\\\/twitter.com\\\/CarPartscom, https:\\\/\\\/www.youtube.com\\\/@CarPartscomOfficial\\\/, https:\\\/\\\/www.instagram.com\\\/carpartscom\\\/\"},{\"@type\":\"Person\",\"$id\":\"1651\",\"name\":\"William Guzenski\",\"jobTitle\":\"ASE Master Automobile Technician\",\"description\":\"William \u201cBill\u201d Guzenski has produced hundreds of how-to videos for the automotive community. He\u2019s an ASE Certified Master Automobile Technician, and is affiliated with the Specialty Equipment Market Association (SEMA). He loves attending race events and car shows throughout the country, as well as traveling in his 40-foot motorhome, exploring abandoned mines and ghost towns.\",\"knowsAbout\":\"Auto Repair, Car Maintenance, Auto Parts, Car Reviews\",\"publishingPrinciples\":\"\\\/blog\\\/our-team\\\/\",\"url\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/author\\\/williamguzenski\\\/\",\"sameAs\":\"\"}],\"headline\":\"What Does an EGR Valve Do?\",\"datePublished\":\"2022-06-21T03:53:17+00:00\",\"dateModified\":\"2026-04-11T09:24:09+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/what-does-an-egr-valve-do\\\/\"},\"wordCount\":1194,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/what-does-an-egr-valve-do\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/wp-content\\\/uploads\\\/2022\\\/06\\\/car-egr-valve-exposed-scaled.jpg\",\"keywords\":[\"egr-valve\"],\"articleSection\":[\"DIY\",\"Exhaust System\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.carparts.com\\\/blog\\\/what-does-an-egr-valve-do\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/what-does-an-egr-valve-do\\\/\",\"url\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/what-does-an-egr-valve-do\\\/\",\"name\":\"What Does an EGR Valve Do? - In The Garage with CarParts.com\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/what-does-an-egr-valve-do\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/what-does-an-egr-valve-do\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/wp-content\\\/uploads\\\/2022\\\/06\\\/car-egr-valve-exposed-scaled.jpg\",\"datePublished\":\"2022-06-21T03:53:17+00:00\",\"dateModified\":\"2026-04-11T09:24:09+00:00\",\"description\":\"The EGR valve performs an important role in regulating exhaust emissions. Read all about it here.\",\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.carparts.com\\\/blog\\\/what-does-an-egr-valve-do\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/what-does-an-egr-valve-do\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/wp-content\\\/uploads\\\/2022\\\/06\\\/car-egr-valve-exposed-scaled.jpg\",\"contentUrl\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/wp-content\\\/uploads\\\/2022\\\/06\\\/car-egr-valve-exposed-scaled.jpg\",\"width\":2048,\"height\":1420,\"caption\":\"car egr valve exposed\"},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/#website\",\"url\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/\",\"name\":\"In The Garage with CarParts.com\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/#organization\",\"name\":\"CarParts.com\",\"url\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/03\\\/cp-itg-logo.png\",\"contentUrl\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/03\\\/cp-itg-logo.png\",\"width\":2048,\"height\":398,\"caption\":\"CarParts.com\"},\"image\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/carpartscom\",\"https:\\\/\\\/x.com\\\/carpartscom\",\"https:\\\/\\\/www.instagram.com\\\/carpartscom\",\"https:\\\/\\\/www.youtube.com\\\/@CarPartscomOfficial\\\/\"]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/#\\\/schema\\\/person\\\/9f8a8b00e1b9f62f86295617b525e1f0\",\"name\":\"CarParts.com Research Team\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/wp-content\\\/uploads\\\/2024\\\/04\\\/thecpteam.jpg485c93be26f8b27acc17cbe4a2313397\",\"url\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/wp-content\\\/uploads\\\/2024\\\/04\\\/thecpteam.jpg\",\"contentUrl\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/wp-content\\\/uploads\\\/2024\\\/04\\\/thecpteam.jpg\",\"caption\":\"CarParts.com Research Team\"},\"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. Guided by CarParts.com's thorough editorial process, our team strives to produce guides and resources DIYers and casual car owners can trust.\",\"sameAs\":[\"https:\\\/\\\/www.carparts.com\\\/blog\\\/author\\\/thecpteam\\\/\",\"https:\\\/\\\/www.facebook.com\\\/carpartscom\",\"https:\\\/\\\/www.instagram.com\\\/carpartscom\\\/\",\"https:\\\/\\\/x.com\\\/https:\\\/\\\/twitter.com\\\/CarPartscom\",\"https:\\\/\\\/www.youtube.com\\\/@CarPartscomOfficial\\\/\"],\"url\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/author\\\/thecpteam\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"What Does an EGR Valve Do? - In The Garage with CarParts.com","description":"The EGR valve performs an important role in regulating exhaust emissions. Read all about it here.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.carparts.com\/blog\/what-does-an-egr-valve-do\/","og_locale":"en_US","og_type":"article","og_title":"What Does an EGR Valve Do? - In The Garage with CarParts.com","og_description":"The EGR valve performs an important role in regulating exhaust emissions. Read all about it here.","og_url":"https:\/\/www.carparts.com\/blog\/what-does-an-egr-valve-do\/","og_site_name":"In The Garage with CarParts.com","article_publisher":"https:\/\/www.facebook.com\/carpartscom","article_author":"https:\/\/www.facebook.com\/carpartscom","article_published_time":"2022-06-21T03:53:17+00:00","article_modified_time":"2026-04-11T09:24:09+00:00","og_image":[{"width":2048,"height":1420,"url":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/06\/car-egr-valve-exposed-scaled.jpg","type":"image\/jpeg"}],"author":"CarParts.com Research Team, William Guzenski, ASE Certified Master Automobile Technician","twitter_card":"summary_large_image","twitter_creator":"@https:\/\/twitter.com\/CarPartscom","twitter_site":"@carpartscom","twitter_misc":{"Written by":"CarParts.com Research Team","Est. reading time":"6 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.carparts.com\/blog\/what-does-an-egr-valve-do\/#article","isPartOf":{"@id":"https:\/\/www.carparts.com\/blog\/what-does-an-egr-valve-do\/"},"author":[{"@type":"Person","$id":"1651","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. Guided by CarParts.com&#039;s thorough editorial process, our team strives to produce guides and resources DIYers and casual car owners can trust.","knowsAbout":"Auto Repair, Car Maintenance, Auto Parts, Car Reviews","publishingPrinciples":"\/blog\/our-team\/","url":"https:\/\/www.carparts.com\/blog\/author\/thecpteam\/","sameAs":"https:\/\/www.facebook.com\/carpartscom, https:\/\/twitter.com\/CarPartscom, https:\/\/www.youtube.com\/@CarPartscomOfficial\/, https:\/\/www.instagram.com\/carpartscom\/"},{"@type":"Person","$id":"1651","name":"William Guzenski","jobTitle":"ASE Master Automobile Technician","description":"William \u201cBill\u201d Guzenski has produced hundreds of how-to videos for the automotive community. He\u2019s an ASE Certified Master Automobile Technician, and is affiliated with the Specialty Equipment Market Association (SEMA). He loves attending race events and car shows throughout the country, as well as traveling in his 40-foot motorhome, exploring abandoned mines and ghost towns.","knowsAbout":"Auto Repair, Car Maintenance, Auto Parts, Car Reviews","publishingPrinciples":"\/blog\/our-team\/","url":"https:\/\/www.carparts.com\/blog\/author\/williamguzenski\/","sameAs":""}],"headline":"What Does an EGR Valve Do?","datePublished":"2022-06-21T03:53:17+00:00","dateModified":"2026-04-11T09:24:09+00:00","mainEntityOfPage":{"@id":"https:\/\/www.carparts.com\/blog\/what-does-an-egr-valve-do\/"},"wordCount":1194,"commentCount":0,"publisher":{"@id":"https:\/\/www.carparts.com\/blog\/#organization"},"image":{"@id":"https:\/\/www.carparts.com\/blog\/what-does-an-egr-valve-do\/#primaryimage"},"thumbnailUrl":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/06\/car-egr-valve-exposed-scaled.jpg","keywords":["egr-valve"],"articleSection":["DIY","Exhaust System"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.carparts.com\/blog\/what-does-an-egr-valve-do\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.carparts.com\/blog\/what-does-an-egr-valve-do\/","url":"https:\/\/www.carparts.com\/blog\/what-does-an-egr-valve-do\/","name":"What Does an EGR Valve Do? - In The Garage with CarParts.com","isPartOf":{"@id":"https:\/\/www.carparts.com\/blog\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.carparts.com\/blog\/what-does-an-egr-valve-do\/#primaryimage"},"image":{"@id":"https:\/\/www.carparts.com\/blog\/what-does-an-egr-valve-do\/#primaryimage"},"thumbnailUrl":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/06\/car-egr-valve-exposed-scaled.jpg","datePublished":"2022-06-21T03:53:17+00:00","dateModified":"2026-04-11T09:24:09+00:00","description":"The EGR valve performs an important role in regulating exhaust emissions. Read all about it here.","inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.carparts.com\/blog\/what-does-an-egr-valve-do\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.carparts.com\/blog\/what-does-an-egr-valve-do\/#primaryimage","url":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/06\/car-egr-valve-exposed-scaled.jpg","contentUrl":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/06\/car-egr-valve-exposed-scaled.jpg","width":2048,"height":1420,"caption":"car egr valve exposed"},{"@type":"WebSite","@id":"https:\/\/www.carparts.com\/blog\/#website","url":"https:\/\/www.carparts.com\/blog\/","name":"In The Garage with CarParts.com","description":"","publisher":{"@id":"https:\/\/www.carparts.com\/blog\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.carparts.com\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.carparts.com\/blog\/#organization","name":"CarParts.com","url":"https:\/\/www.carparts.com\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.carparts.com\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2025\/03\/cp-itg-logo.png","contentUrl":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2025\/03\/cp-itg-logo.png","width":2048,"height":398,"caption":"CarParts.com"},"image":{"@id":"https:\/\/www.carparts.com\/blog\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/carpartscom","https:\/\/x.com\/carpartscom","https:\/\/www.instagram.com\/carpartscom","https:\/\/www.youtube.com\/@CarPartscomOfficial\/"]},{"@type":"Person","@id":"https:\/\/www.carparts.com\/blog\/#\/schema\/person\/9f8a8b00e1b9f62f86295617b525e1f0","name":"CarParts.com Research Team","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/04\/thecpteam.jpg485c93be26f8b27acc17cbe4a2313397","url":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/04\/thecpteam.jpg","contentUrl":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/04\/thecpteam.jpg","caption":"CarParts.com Research Team"},"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. Guided by CarParts.com's thorough editorial process, our team strives to produce guides and resources DIYers and casual car owners can trust.","sameAs":["https:\/\/www.carparts.com\/blog\/author\/thecpteam\/","https:\/\/www.facebook.com\/carpartscom","https:\/\/www.instagram.com\/carpartscom\/","https:\/\/x.com\/https:\/\/twitter.com\/CarPartscom","https:\/\/www.youtube.com\/@CarPartscomOfficial\/"],"url":"https:\/\/www.carparts.com\/blog\/author\/thecpteam\/"}]}},"featured_image_src":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/06\/car-egr-valve-exposed-scaled.jpg","featured_image_src_square":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/06\/car-egr-valve-exposed-scaled.jpg","author_info":{"display_name":"CarParts.com Research Team","author_link":"https:\/\/www.carparts.com\/blog\/author\/thecpteam\/"},"authors":[{"term_id":2607,"user_id":1651,"is_guest":0,"slug":"thecpteam","display_name":"CarParts.com Research Team","avatar_url":{"url":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/04\/thecpteam.jpg","url2x":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/04\/thecpteam.jpg"},"0":null,"1":"","2":"","3":"","4":"","5":"","6":"","7":"","8":""},{"term_id":2855,"user_id":1645,"is_guest":0,"slug":"williamguzenski","display_name":"William Guzenski, ASE Certified Master Automobile Technician","avatar_url":{"url":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/william-bill-guzenski-carparts-ase-certified-technician.png","url2x":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/william-bill-guzenski-carparts-ase-certified-technician.png"},"0":null,"1":"","2":"","3":"","4":"","5":"","6":"","7":"","8":""}],"_links":{"self":[{"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/posts\/69995","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/users\/1651"}],"replies":[{"embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/comments?post=69995"}],"version-history":[{"count":0,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/posts\/69995\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/media\/70003"}],"wp:attachment":[{"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/media?parent=69995"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/categories?post=69995"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/tags?post=69995"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/ppma_author?post=69995"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}