{"id":66994,"date":"2022-02-28T00:39:43","date_gmt":"2022-02-28T08:39:43","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=66994"},"modified":"2024-12-19T05:14:57","modified_gmt":"2024-12-19T13:14:57","slug":"p0492-code-secondary-air-injection-system-insufficient-flow-bank-2","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p0492-code-secondary-air-injection-system-insufficient-flow-bank-2\/","title":{"rendered":"P0492 Code: Secondary Air Injection System Insufficient Flow (Bank 2)"},"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-column66994_d81389-1e > .kt-inside-inner-col,.kadence-column66994_d81389-1e > .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-column66994_d81389-1e > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column66994_d81389-1e > .kt-inside-inner-col{flex-direction:column;}.kadence-column66994_d81389-1e > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column66994_d81389-1e > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column66994_d81389-1e{position:relative;}@media all and (max-width: 1024px){.kadence-column66994_d81389-1e > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column66994_d81389-1e > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column66994_d81389-1e inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-f1dc1e  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-73760c\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading66994_f3e713-15, .wp-block-kadence-advancedheading.kt-adv-heading66994_f3e713-15[data-kb-block=\"kb-adv-heading66994_f3e713-15\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading66994_f3e713-15 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading66994_f3e713-15[data-kb-block=\"kb-adv-heading66994_f3e713-15\"] 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-heading66994_f3e713-15 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading66994_f3e713-15[data-kb-block=\"kb-adv-heading66994_f3e713-15\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading66994_f3e713-15 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading66994_f3e713-15\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The P0492 code stands for &ldquo;Secondary Air Injection System Insufficient Flow (Bank 2).&rdquo;<\/li>\n\n\n\n<li>This is logged when the powertrain control module (PCM) detects that the secondary air injection system isn&rsquo;t supplying enough air to the bank 2 side of the engine.<\/li>\n\n\n\n<li>A clogged or disconnected vacuum hose, faulty secondary air pump control valve, electrical issues, and obstructed air injection passages are common reasons why on-board diagnostics (OBD) will log this code.<\/li>\n\n\n\n<li>Aside from an illuminated check engine light, an increase in tailpipe emissions is the only other noticeable symptom for this code.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Some cars use a secondary air injection system to reduce <a href=\"https:\/\/www.carparts.com\/muffler-and-tailpipe\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"tailpipe\">tailpipe<\/a> emissions. Depending on the vehicle, the system may supply air to the exhaust manifolds, the catalytic converter, or both at different times. The additional air helps reduce harmful exhaust gases through oxidation. The catalytic converter also warms up more quickly when air is added to the exhaust manifolds.<\/p>\n\n\n\n<p>If the secondary air injection system develops a fault on the bank 2 side of the engine, the PCM will log a P0492 code.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P0492 Code Mean?<\/h2>\n\n\n\n<p>The <a href=\"https:\/\/www.carparts.com\/blog\/search-obd2-codes-list\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Diagnostic Trouble Code\">Diagnostic Trouble Code<\/a> (DTC) P0492 indicates &ldquo;Secondary Air Injection System Insufficient Flow Bank 2.&rdquo;<\/p>\n\n\n\n<p>Most secondary air injection systems consist of an air pump, air management solenoids, necessary plumbing, and one or more check valves. To manage the flow of air through its passageways, the system opens or closes the valves.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"651\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/02\/car-tailpipe-emissions-1024x651.jpg\" alt=\"car tailpipe emissions\" class=\"wp-image-66998\" style=\"width:1024px;height:651px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/02\/car-tailpipe-emissions-1024x651.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/02\/car-tailpipe-emissions-300x191.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/02\/car-tailpipe-emissions-768x488.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/02\/car-tailpipe-emissions-1536x977.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/02\/car-tailpipe-emissions-scaled.jpg 2048w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/02\/car-tailpipe-emissions-150x95.jpg 150w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">Some cars use a secondary air injection system to reduce tailpipe emissions.<\/figcaption><\/figure>\n\n\n\n<p>In engines with two cylinder banks, the secondary air injection system typically supplies additional air to both banks.<\/p>\n\n\n\n<p>The PCM regularly checks how much air flows through the secondary air injection system. If the computer notices that the system isn&rsquo;t sending enough air to bank 2, it will set the powertrain code P0492.<\/p>\n\n\n\n<p>Read our advanced discussion about <a href=\"https:\/\/www.carparts.com\/blog\/p0491-code-secondary-air-injection-system-insufficient-flow-bank-1\/#A_Closer_Look_at_the_Secondary_Air_AIR_System\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"secondary air injection systems\">secondary air injection systems<\/a> to better understand codes like P0492.<\/p>\n\n\n\n<p><em><strong>Note:<\/strong> The definition of code P0492 may 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 P0492 Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Clogged or disconnected vacuum hose<\/li>\n\n\n\n<li>Faulty <a href=\"https:\/\/www.carparts.com\/engine-control-module\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"PCM\">PCM<\/a><\/li>\n\n\n\n<li>Bad secondary <a href=\"https:\/\/www.carparts.com\/air-pump-control-valve\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"air pump control valve\">air pump control valve<\/a><\/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<ul id=\"block-9d535675-435c-4210-8a59-845140557b23\" class=\"wp-block-list\">\n<li>Problems with the secondary <a href=\"https:\/\/www.carparts.com\/air-pump\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"air pump\">air pump<\/a><\/li>\n\n\n\n<li>Issues with the <a href=\"https:\/\/www.carparts.com\/blog\/car-wiring\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"electrical wiring\">electrical wiring<\/a><\/li>\n\n\n\n<li>Obstructed secondary air injection passages<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Common Symptoms of the P0492 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=\"Check engine light illuminated\">Check engine light illuminated<\/a><\/li>\n\n\n\n<li>Increased tailpipe emissions<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P0492 Code<\/h2>\n\n\n\n<p>The P0492 is a generic powertrain code. It applies to OBD II-compliant vehicles.<\/p>\n\n\n\n<p>If you&rsquo;re not confident about conducting diagnostic tests on your vehicle, it&rsquo;s a good idea to bring it to a certified mechanic. Otherwise, you may go ahead and diagnose the issue yourself.<\/p>\n\n\n\n<p>To help you get started, here is a video that may give you an idea of 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=\"How to Fix and Diagnose BMW P0491 P0492 Secondary Air \/ Vacuum Leak E36 E46 E39 E53\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/oymVvM7Wxbc?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 P0492 Code<\/h2>\n\n\n\n<p>Attempting to fix a P0492 code may become a frustrating task if you don&rsquo;t have the right tools and know-how to test the secondary air injection system. In most cases, it&rsquo;s best to leave the job to a professional.<\/p>\n\n\n\n<p>For DIYers with advanced technical knowledge and hands-on experience, who prefer to test and repair their vehicle on their own, it will be helpful to rely on the appropriate <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 refer to an online repair database\">repair manual or refer to an online repair database<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Order a Replacement Vacuum Hose in the Comfort of Your Home<\/h2>\n\n\n\n<p>If your vacuum hose causes the P0429 code to set, it&rsquo;s a good idea to replace it immediately. Exhaust system issues can cost considerable sums to fix, and they can cause your vehicle to fail its next emissions test. CarParts.com makes finding a compatible replacement vacuum hose fast and effortless.<\/p>\n\n\n\n<p>You don&rsquo;t have to go to a physical store to get a new vacuum hose anymore, as you can order one in the comfort of your home. Use your mobile phone to access <a href=\"http:\/\/carparts.com\" target=\"_blank\" rel=\"noreferrer noopener nofollow\" aria-label=\"CarParts.com\">CarParts.com<\/a>, and enter your vehicle&rsquo;s details in our vehicle selector to bring up compatible parts. We only source our vacuum hoses from reputable manufacturers, so you know you&rsquo;re getting a quality part. Our products are also ready to ship from one of our strategically located warehouses, so you can get your order in just a few business days.<\/p>\n\n\n\n<p>Check out our wide selection of <a href=\"https:\/\/www.carparts.com\/vacuum-hose\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"vacuum hoses\">vacuum hoses<\/a> at CarParts.com and shop now.<\/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>Some cars use a secondary air injection system to reduce tailpipe emissions. Depending on the vehicle, the system may supply&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p0492-code-secondary-air-injection-system-insufficient-flow-bank-2\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":66999,"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":[3207],"ppma_author":[2607,2985],"class_list":{"0":"post-66994","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-vacuum-hose","9":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P0492 Code: Secondary Air Injection System Insufficient Flow (Bank 2) - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Learn what the PP0492 code means, its possible causes, common symptoms, as well as what to do if you get this code on your scanner.\" \/>\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\/p0492-code-secondary-air-injection-system-insufficient-flow-bank-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0492 Code: Secondary Air Injection System Insufficient Flow (Bank 2) - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Learn what the PP0492 code means, its possible causes, common symptoms, as well as what to do if you get this code on your scanner.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/p0492-code-secondary-air-injection-system-insufficient-flow-bank-2\/\" \/>\n<meta property=\"og:site_name\" content=\"In The Garage with CarParts.com\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/carpartscom\" \/>\n<meta property=\"article:published_time\" content=\"2022-02-28T08:39:43+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-12-19T13:14:57+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/02\/car-tailpipe-close-look-scaled.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2048\" \/>\n\t<meta property=\"og:image:height\" content=\"1193\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:site\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"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\\\/p0492-code-secondary-air-injection-system-insufficient-flow-bank-2\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0492-code-secondary-air-injection-system-insufficient-flow-bank-2\\\/\"},\"author\":[{\"@type\":\"Person\",\"$id\":\"4\",\"name\":\"CarParts.com Research Team\",\"jobTitle\":\"Expert Automotive Writer\",\"description\":\"The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. 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