{"id":67860,"date":"2022-04-07T23:56:24","date_gmt":"2022-04-08T06:56:24","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=67860"},"modified":"2026-02-17T23:24:34","modified_gmt":"2026-02-18T07:24:34","slug":"p0499-code-evaporative-emission-system-vent-valve-control-circuit-high","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p0499-code-evaporative-emission-system-vent-valve-control-circuit-high\/","title":{"rendered":"P0499 Code: Evaporative Emission System Vent Valve Control Circuit High"},"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-column67860_b572e1-71 > .kt-inside-inner-col,.kadence-column67860_b572e1-71 > .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-column67860_b572e1-71 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column67860_b572e1-71 > .kt-inside-inner-col{flex-direction:column;}.kadence-column67860_b572e1-71 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column67860_b572e1-71 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column67860_b572e1-71{position:relative;}@media all and (max-width: 1024px){.kadence-column67860_b572e1-71 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column67860_b572e1-71 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column67860_b572e1-71 inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-71790e  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-16235c\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading67860_995f32-65, .wp-block-kadence-advancedheading.kt-adv-heading67860_995f32-65[data-kb-block=\"kb-adv-heading67860_995f32-65\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading67860_995f32-65 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading67860_995f32-65[data-kb-block=\"kb-adv-heading67860_995f32-65\"] 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-heading67860_995f32-65 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading67860_995f32-65[data-kb-block=\"kb-adv-heading67860_995f32-65\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading67860_995f32-65 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading67860_995f32-65\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The P0499 code stands for &ldquo;Evaporative Emission (EVAP) System Vent Valve Control Circuit High,&rdquo; which means the powertrain control module (PCM) detects a problem with the EVAP system&rsquo;s vent valve.<\/li>\n\n\n\n<li>Some of the common causes of the P0499 code include EVAP vent valve failure, wiring issues, and PCM failure.<\/li>\n\n\n\n<li>An illuminated check engine light is one symptom related to the P0499 code.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>The evaporative (EVAP) emission control system is designed to trap and hold volatile organic compounds (VOCs), such as carbon monoxide (CO) and nitrogen oxide (NOx). The EVAP system prevents these gasoline vapors from being released into the atmosphere while reducing the vehicle&rsquo;s exhaust emissions.<\/p>\n\n\n\n<p>The EVAP system has a vent valve that allows fresh air to enter the system. If the powertrain control module (PCM) detects a fault with the circuit controlling the vent or the system is venting when it shouldn&rsquo;t, a code P0499 will be logged by on-board diagnostics (OBD).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P0499 Code Mean?<\/h2>\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\/2022\/03\/man-performing-needed-inspection-under-the-vehicle-1024x683.jpg\" alt=\"mechanic inspecting the underside of a vehicle\" class=\"wp-image-67862\" style=\"width:1024px;height:683px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/man-performing-needed-inspection-under-the-vehicle-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/man-performing-needed-inspection-under-the-vehicle-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/man-performing-needed-inspection-under-the-vehicle-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/man-performing-needed-inspection-under-the-vehicle-1536x1024.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/man-performing-needed-inspection-under-the-vehicle-scaled.jpg 2048w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/man-performing-needed-inspection-under-the-vehicle-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/man-performing-needed-inspection-under-the-vehicle-150x100.jpg 150w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">The EVAP system prevents these gasoline vapors from being released into the atmosphere while reducing the vehicle&rsquo;s exhaust emissions.<\/figcaption><\/figure>\n\n\n\n<p>Diagnostic trouble code (DTC) P0499 stands for &ldquo;Evaporative Emission System Vent Valve Control Circuit High.&rdquo;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">How an Evaporative Emission System Works<\/h3>\n\n\n\n<p>The EVAP system consists of hoses, valves, and a <a href=\"https:\/\/www.carparts.com\/vapor-canister\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"charcoal canister\">charcoal canister<\/a>. To prevent vapors from being released into the atmosphere, they are routed into the charcoal canister, then into the intake airflow where they are burned in the engine.<\/p>\n\n\n\n<p>As the <a href=\"https:\/\/www.carparts.com\/vapor-canister-purge-solenoid\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"canister purge solenoid\">canister purge solenoid<\/a> valve opens, the manifold vacuum draws in the vapors from the canister. The same vacuum is applied to the pressure control valve. As the valve opens, fumes from the <a href=\"https:\/\/www.carparts.com\/fuel-tank\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"fuel tank\">fuel tank<\/a> are routed into the canister until it reaches the engine.<\/p>\n\n\n\n<p>Once the valve closes, the pressure control valve is shut to keep vapors from escaping into the atmosphere.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"940\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/engine-control-module-activating-P0499-code-1024x940.jpg\" alt=\"engine control module activating P0499 code\" class=\"wp-image-67861\" style=\"width:1024px;height:940px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/engine-control-module-activating-P0499-code-1024x940.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/engine-control-module-activating-P0499-code-300x275.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/engine-control-module-activating-P0499-code-768x705.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/engine-control-module-activating-P0499-code-1536x1410.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/engine-control-module-activating-P0499-code-150x138.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/engine-control-module-activating-P0499-code.jpg 1700w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">Once the PCM detects any problem with the EVAP system&rsquo;s vent valve, it will log a P0499 code.<\/figcaption><\/figure>\n\n\n\n<p>The vent valve is normally open and is closed whenever the <a href=\"https:\/\/www.carparts.com\/engine-control-module\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"PCM\">PCM<\/a> tests the system. Because of the valve&rsquo;s location, it is often subject to rust and corrosion. Once the PCM detects any problem with the EVAP system&rsquo;s vent valve, it will log a P0499 code.<\/p>\n\n\n\n<p><em><strong>Note:<\/strong> The definition of code P0499 could 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 Common Causes of the P0499 Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>EVAP vent valve failure<\/li>\n\n\n\n<li><a href=\"https:\/\/www.carparts.com\/blog\/car-wiring\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Wiring\">Wiring<\/a> issues<\/li>\n\n\n\n<li>PCM failure<\/li>\n<\/ul>\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<h2 class=\"wp-block-heading\">What are the Common Symptoms of the P0499 Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<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>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P0499 Code?<\/h2>\n\n\n\n<p>P0499 is commonly stored in makes like Dodge, Honda, and Chevrolet, among others. While this DTC is considered a generic powertrain code, keep in mind that the steps for diagnosis and repair can vary depending on your vehicle&rsquo;s specifications. If you&rsquo;re not familiar with the process of diagnosing an EVAP system, it&rsquo;s a good idea to bring your vehicle to a certified mechanic instead.<\/p>\n\n\n\n<p>Here are some videos that show what the process might involve:<\/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=\"EVAP Emissions P0455 or P0499 Fix for General Motors Vehicles\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/zZIYzd-xSck?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 P0499 Code<\/h2>\n\n\n\n<p>Fixing a P0499 code can be frustrating and confusing if you don&rsquo;t have the right tools and know-how for the job. Under these circumstances, it&rsquo;s best to bring your vehicle to the nearest repair shop to ensure that the steps for repair are being followed correctly.<\/p>\n\n\n\n<p>If you&rsquo;re a seasoned DIYer who knows your way around trouble codes, you&rsquo;ll know <a href=\"https:\/\/www.carparts.com\/blog\/why-you-should-always-consult-a-repair-manual\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"the importance of reading the repair manual\">the importance of reading the repair manual<\/a> before proceeding. Guides from those like Chilton or an ALLDATA subscription contain vehicle-specific repair information, so you might want to check those out before you start.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Where to Get a New EVAP System Vent Valve for Your Vehicle<\/h2>\n\n\n\n<p>Once you&rsquo;ve identified that your EVAP system vent valve needs to be replaced, make sure to shop for a replacement right here at <a href=\"https:\/\/www.carparts.com\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"CarParts.com\">CarParts.com<\/a>.<\/p>\n\n\n\n<p>Our selection of direct-fit <a href=\"https:\/\/www.carparts.com\/vapor-canister-check-valve\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"EVAP system vent valves\">EVAP system vent valves<\/a> has passed strict quality checks, ensuring that you&rsquo;ll only get the best part for your ride. Choose from the top aftermarket brands today, and check out in a matter of minutes.<\/p>\n\n\n\n<p>Use our website&rsquo;s vehicle selector to narrow down the search results to products that match your car&rsquo;s specifications. You can also reach our round-the-clock customer service representatives via our toll-free hotline to get further assistance when shopping.<\/p>\n\n\n\n<p>Here at CarParts.com, you&rsquo;ll never go over budget when shopping for replacement parts. All our products come with a low-price guarantee to help you get the best value for your money. We&rsquo;ll deliver straight to your doorstep in as fast as two business days.<\/p>\n\n\n\n<p>Check out our products today, and get your vehicle back on the road in no time with our high-quality EVAP system vent valves.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<div class=\"shop-project\">\n\n    <h2>Shop this Project<\/h2>\n\n    <ul class=\"shop-project-list\">\n        \n        <li>\n            <div class=\"shop-project-item\">\n                <div class=\"stp-image-url\">\n                    <a href=\"https:\/\/www.carparts.com\/details\/fuel-tank\/jc-whitney\/rept670123\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label='&lt;img src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/rept670123_1\" alt=\"JC Whitney&reg; &ndash; Fuel Tank, 13.2 Gallons \/ 50 Liters, With Pan\" \/&gt;'><img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/rept670123_1\" alt=\"JC Whitney&reg; &ndash; Fuel Tank, 13.2 Gallons \/ 50 Liters, With Pan\"><\/a>\n                <\/div>\n\n                <div class=\"stp-desc\">\n                                            <p class=\"stp-title\">\n                            <a href=\"https:\/\/www.carparts.com\/details\/fuel-tank\/jc-whitney\/rept670123\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"JC Whitney&reg; &ndash; Fuel Tank, 13.2 Gallons \/ 50 Liters, With Pan\">JC Whitney&reg; &ndash; Fuel Tank, 13.2 Gallons \/ 50 Liters, With Pan<\/a>\n                        <\/p>\n                    \n                    <div class=\"stp-stars\">\n                        <img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/q_auto,dpr_auto,f_auto\/carparts\/blog\/widgets\/shop-project\/stars\/star-5.svg\" alt=\"5 Stars\">\n                    <\/div>\n\n                                            <p class=\"stp-price\">$224.92<\/p>\n                    \n                    <p><small>Price and rating may change from the time content is published.<\/small><\/p>\n\n                                            <p class=\"stp-cta\">\n                            <a href=\"https:\/\/www.carparts.com\/details\/fuel-tank\/jc-whitney\/rept670123\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Shop Now\">Shop Now<\/a>\n                        <\/p>\n                                    <\/div>\n\n            <\/div>\n        <\/li>\n\n        \n        <li>\n            <div class=\"shop-project-item\">\n                <div class=\"stp-image-url\">\n                    <a href=\"https:\/\/www.carparts.com\/details\/vapor-canister\/replacement\/rb38640001\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label='&lt;img src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/rb38640001_1\" alt=\"Replacement &ndash; Vapor Canister, Activated Charcoal Filter\" \/&gt;'><img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/rb38640001_1\" alt=\"Replacement &ndash; Vapor Canister, Activated Charcoal Filter\"><\/a>\n                <\/div>\n\n                <div class=\"stp-desc\">\n                                            <p class=\"stp-title\">\n                            <a href=\"https:\/\/www.carparts.com\/details\/vapor-canister\/replacement\/rb38640001\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Replacement &ndash; Vapor Canister, Activated Charcoal Filter\">Replacement &ndash; Vapor Canister, Activated Charcoal Filter<\/a>\n                        <\/p>\n                    \n                    <div class=\"stp-stars\">\n                        <img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/q_auto,dpr_auto,f_auto\/carparts\/blog\/widgets\/shop-project\/stars\/star-0.svg\" alt=\"0 Stars\">\n                    <\/div>\n\n                                            <p class=\"stp-price\">$34.99<\/p>\n                    \n                    <p><small>Price and rating may change from the time content is published.<\/small><\/p>\n\n                                            <p class=\"stp-cta\">\n                            <a href=\"https:\/\/www.carparts.com\/details\/vapor-canister\/replacement\/rb38640001\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Shop Now\">Shop Now<\/a>\n                        <\/p>\n                                    <\/div>\n\n            <\/div>\n        <\/li>\n\n        \n        <li>\n            <div class=\"shop-project-item\">\n                <div class=\"stp-image-url\">\n                    <a href=\"https:\/\/www.carparts.com\/details\/vapor-canister-purge-solenoid\/replacement\/repc381002\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label='&lt;img src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/repc381002_1\" alt=\"Replacement &ndash; Vapor Canister Purge Solenoid\" \/&gt;'><img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/repc381002_1\" alt=\"Replacement &ndash; Vapor Canister Purge Solenoid\"><\/a>\n                <\/div>\n\n                <div class=\"stp-desc\">\n                                            <p class=\"stp-title\">\n                            <a href=\"https:\/\/www.carparts.com\/details\/vapor-canister-purge-solenoid\/replacement\/repc381002\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Replacement &ndash; Vapor Canister Purge Solenoid\">Replacement &ndash; Vapor Canister Purge Solenoid<\/a>\n                        <\/p>\n                    \n                    <div class=\"stp-stars\">\n                        <img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/q_auto,dpr_auto,f_auto\/carparts\/blog\/widgets\/shop-project\/stars\/star-4.5.svg\" alt=\"4.5 Stars\">\n                    <\/div>\n\n                                            <p class=\"stp-price\">$16.99<\/p>\n                    \n                    <p><small>Price and rating may change from the time content is published.<\/small><\/p>\n\n                                            <p class=\"stp-cta\">\n                            <a href=\"https:\/\/www.carparts.com\/details\/vapor-canister-purge-solenoid\/replacement\/repc381002\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Shop Now\">Shop Now<\/a>\n                        <\/p>\n                                    <\/div>\n\n            <\/div>\n        <\/li>\n\n            <\/ul>\n<\/div>\n\n\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 evaporative (EVAP) emission control system is designed to trap and hold volatile organic compounds (VOCs), such as carbon monoxide&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p0499-code-evaporative-emission-system-vent-valve-control-circuit-high\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":1651,"featured_media":68090,"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":[1198,1663,3029],"ppma_author":[2607,2855],"class_list":{"0":"post-67860","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-fuel-tank-2","9":"tag-vapor-canister","10":"tag-vapor-canister-purge-solenoid","11":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P0499 Code: Evaporative Emission System Vent Valve Control Circuit High - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Learn more about the P0499 code, its symptoms, and what role your vehicle\u2019s EVAP system plays when it comes to this DTC.\" \/>\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\/p0499-code-evaporative-emission-system-vent-valve-control-circuit-high\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0499 Code: Evaporative Emission System Vent Valve Control Circuit High - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Learn more about the P0499 code, its symptoms, and what role your vehicle\u2019s EVAP system plays when it comes to this DTC.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/p0499-code-evaporative-emission-system-vent-valve-control-circuit-high\/\" \/>\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=\"2022-04-08T06:56:24+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-02-18T07:24:34+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/04\/under-view-of-a-car-scaled.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2048\" \/>\n\t<meta property=\"og:image:height\" content=\"1365\" \/>\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=\"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\\\/p0499-code-evaporative-emission-system-vent-valve-control-circuit-high\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0499-code-evaporative-emission-system-vent-valve-control-circuit-high\\\/\"},\"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. 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