{"id":76183,"date":"2022-10-17T18:55:45","date_gmt":"2022-10-18T01:55:45","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=76183"},"modified":"2026-02-11T14:44:22","modified_gmt":"2026-02-11T22:44:22","slug":"p2443-code-secondary-air-injection-system-switching-valve-stuck-closed-bank-2","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p2443-code-secondary-air-injection-system-switching-valve-stuck-closed-bank-2\/","title":{"rendered":"P2443 Code: Secondary Air Injection System Switching Valve Stuck Closed 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-column76183_51a5bf-a2 > .kt-inside-inner-col,.kadence-column76183_51a5bf-a2 > .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-column76183_51a5bf-a2 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column76183_51a5bf-a2 > .kt-inside-inner-col{flex-direction:column;}.kadence-column76183_51a5bf-a2 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column76183_51a5bf-a2 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column76183_51a5bf-a2{position:relative;}@media all and (max-width: 1024px){.kadence-column76183_51a5bf-a2 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column76183_51a5bf-a2 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column76183_51a5bf-a2 inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-bdfa21  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-3412ec\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading76183_5dcd6b-1e, .wp-block-kadence-advancedheading.kt-adv-heading76183_5dcd6b-1e[data-kb-block=\"kb-adv-heading76183_5dcd6b-1e\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading76183_5dcd6b-1e mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading76183_5dcd6b-1e[data-kb-block=\"kb-adv-heading76183_5dcd6b-1e\"] 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-heading76183_5dcd6b-1e img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading76183_5dcd6b-1e[data-kb-block=\"kb-adv-heading76183_5dcd6b-1e\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading76183_5dcd6b-1e summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading76183_5dcd6b-1e\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The P2443 code stands for &ldquo;Secondary Air Injection System Switching Valve Stuck Closed Bank 2,&rdquo; which means the powertrain control module (PCM) detects a problem with the SAI system switching valve.<\/li>\n\n\n\n<li>Common causes of the P2443 code include a faulty SAI system control valve, a clogged or disconnected vacuum hose, and a damaged secondary air pump.<\/li>\n\n\n\n<li>One of the common symptoms of the P2443 code is an illuminated check engine light.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>The secondary air injection (SAI) system helps in the oxidizing process of the exhaust system during cold start-up. It supplies the exhaust system with fresh air to reduce harmful exhaust emissions that could escape when the air-fuel mixture is rich. The SAI system can either be electrically or belt-driven and has a switching valve that controls airflow. If 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) detects a problem with the switching valve, it will log a P2443 code.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P2443 Code Mean?<\/h2>\n\n\n\n<p><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) P2443 stands for &ldquo;Secondary Air Injection System Switching Valve Stuck Closed Bank 2.&rdquo;<\/p>\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\/10\/secondary-air-injection-pump-of-sai-system-1024x602.jpg\" alt=\"secondary air injection pump of sai system\" class=\"wp-image-76197\" style=\"width:1024px;height:602px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/secondary-air-injection-pump-of-sai-system-1024x602.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/secondary-air-injection-pump-of-sai-system-300x176.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/secondary-air-injection-pump-of-sai-system-768x452.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/secondary-air-injection-pump-of-sai-system-1536x904.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/secondary-air-injection-pump-of-sai-system-150x88.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/secondary-air-injection-pump-of-sai-system.jpg 1700w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">The SAI system has a pump that pulls in fresh air through an external filter and passes through each exhaust port before it reaches the connecting hoses or manifold.<\/figcaption><\/figure>\n\n\n\n<p>The SAI system has a <a href=\"https:\/\/www.carparts.com\/secondary-air-injection-pump\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"pump\">pump<\/a> that pulls in fresh air through an external filter and passes through each exhaust port before it reaches the connecting hoses or manifold. The system also has one or more <a href=\"https:\/\/www.carparts.com\/secondary-air-injection-check-valve\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"check valves\">check valves<\/a> located between the manifold and switching valves. These valves help protect the pump and other parts from reverse exhaust flow, which occurs when the exhaust pressure exceeds injection pressure.<\/p>\n\n\n\n<p><strong><em>Note:<\/em><\/strong><em> The definition of <\/em><em>code P2443 <\/em><em>might 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 P2443 Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Faulty SAI system control valve<\/li>\n\n\n\n<li>Clogged or disconnected vacuum hose<\/li>\n\n\n\n<li>Damaged secondary air pump<\/li>\n\n\n\n<li>Wiring issues<\/li>\n\n\n\n<li><a href=\"https:\/\/www.carparts.com\/blog\/car-pcm-meaning-symptoms-of-failure-and-more\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"PCM failure or software in need of an update\">PCM failure or software in need of an update<\/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<h2 class=\"wp-block-heading\">What are the Common Symptoms of the P2443 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 P2443 Code<\/h2>\n\n\n\n<p>Diagnosing a P2443 usually involves using a scan tool and inspecting the SAI system for damaged or corroded wiring and connectors. The process can also require some additional steps, depending on the vehicle&rsquo;s year, make, and model. If you&rsquo;re not familiar with the diagnostic process, it might be best to have a certified mechanic do the job for you to ensure that all steps and protocols are followed correctly.<\/p>\n\n\n\n<p>But if you think you can handle the task on your own, take a look at this video to get 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=\"2010 Toyota Tundra Secondary Air Injection (P2443)\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/drWkUJh4SXY?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 P2443 Code<\/h2>\n\n\n\n<p>Attempting to fix a P2443 code can be a frustrating and confusing task, especially without the right tools and technical information. It might even lead to further complications and more expensive repairs if done incorrectly. Under these circumstances, bringing your vehicle to a trained professional might be your best bet to resolve the issue.<\/p>\n\n\n\n<p>But if you&rsquo;re someone who&rsquo;s had their fair share of dealing with trouble codes before, then you probably know that umbrella fixes don&rsquo;t exist. Before working on your vehicle, make sure to have the right information. Guides like those from Chilton or an ALLDATA subscription contain vehicle-specific repair information, so you might want to check those out before you begin.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Where to Get New Secondary Air Injection System Components for Your Vehicle<\/h2>\n\n\n\n<p>if you need to replace the <a href=\"https:\/\/www.carparts.com\/vacuum-switching-valve\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"switching valve\">switching valve<\/a> or any of the parts mentioned above, don&rsquo;t put off shopping for the component you need. Otherwise, the faulty part could cause issues that require costly repairs.<\/p>\n\n\n\n<p>Find exactly what you need here at <a href=\"https:\/\/www.carparts.com\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"CarParts.com\">CarParts.com<\/a>. Here you can get an OE-grade SAI system part delivered straight to your doorstep in as fast as two business days, thanks to our strategically located warehouses across the US.<\/p>\n\n\n\n<p>Take your pick from a great selection of aftermarket SAI system parts that passed the highest quality control standards from industry professionals, and place your order with only a few clicks.<\/p>\n\n\n\n<p>To start, simply enter your vehicle&rsquo;s year, make, and model into our vehicle selector to narrow down the catalog to compatible components for your ride. You can also reach us via our toll-free hotline, and our team will be ready to assist you 24\/7.<\/p>\n\n\n\n<p>Going over budget will never be an issue. We have the best deals and lowest prices for auto parts that will help you get the best value for your money. Check out our catalog today.<\/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\/secondary-air-injection-pump\/replacement\/repm963202\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label='&lt;img src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/repm963202_3\" alt=\"Replacement &ndash; Secondary Air Injection Pump\" \/&gt;'><img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/repm963202_3\" alt=\"Replacement &ndash; Secondary Air Injection Pump\"><\/a>\n                <\/div>\n\n                <div class=\"stp-desc\">\n                                            <p class=\"stp-title\">\n                            <a href=\"https:\/\/www.carparts.com\/details\/secondary-air-injection-pump\/replacement\/repm963202\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Replacement &ndash; Secondary Air Injection Pump\">Replacement &ndash; Secondary Air Injection Pump<\/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\">$99.99<\/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\/secondary-air-injection-pump\/replacement\/repm963202\" 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\/secondary-air-injection-check-valve\/replacement\/repb383501\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label='&lt;img src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/repb383501_3\" alt=\"Replacement &ndash; Secondary Air Injection Check Valve, 6 Cylinder, 3.8L Engine; with California Emission System, Without Bracket And Pipe\" \/&gt;'><img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/repb383501_3\" alt=\"Replacement &ndash; Secondary Air Injection Check Valve, 6 Cylinder, 3.8L Engine; with California Emission System, Without Bracket And Pipe\"><\/a>\n                <\/div>\n\n                <div class=\"stp-desc\">\n                                            <p class=\"stp-title\">\n                            <a href=\"https:\/\/www.carparts.com\/details\/secondary-air-injection-check-valve\/replacement\/repb383501\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Replacement &ndash; Secondary Air Injection Check Valve, 6 Cylinder, 3.8L Engine; with California Emission System, Without Bracket And Pipe\">Replacement &ndash; Secondary Air Injection Check Valve, 6 Cylinder, 3.8L Engine; with California Emission System, Without Bracket And Pipe<\/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\">$95.99<\/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\/secondary-air-injection-check-valve\/replacement\/repb383501\" 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\/vacuum-switching-valve\/dorman\/rb994157\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label='&lt;img src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/rb994157_1\" alt=\"Dorman&reg; &ndash; 994-157 Vacuum Switching Valve\" \/&gt;'><img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/rb994157_1\" alt=\"Dorman&reg; &ndash; 994-157 Vacuum Switching Valve\"><\/a>\n                <\/div>\n\n                <div class=\"stp-desc\">\n                                            <p class=\"stp-title\">\n                            <a href=\"https:\/\/www.carparts.com\/details\/vacuum-switching-valve\/dorman\/rb994157\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Dorman&reg; &ndash; 994-157 Vacuum Switching Valve\">Dorman&reg; &ndash; 994-157 Vacuum Switching Valve<\/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\">$59.99<\/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\/vacuum-switching-valve\/dorman\/rb994157\" 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 secondary air injection (SAI) system helps in the oxidizing process of the exhaust system during cold start-up. It supplies&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p2443-code-secondary-air-injection-system-switching-valve-stuck-closed-bank-2\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":1651,"featured_media":76196,"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":[1323,2058,2064],"ppma_author":[2607,2855],"class_list":{"0":"post-76183","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-engine-control-module-2","9":"tag-secondary-air-injection-check-valve","10":"tag-secondary-air-injection-pump","11":"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>P2443 Code: Secondary Air Injection System Switching Valve Stuck Closed Bank 2 - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Has your vehicle recently logged a P2443 trouble code? Read on to find out what it means, and know the most common causes that could have triggered the code.\" \/>\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\/p2443-code-secondary-air-injection-system-switching-valve-stuck-closed-bank-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P2443 Code: Secondary Air Injection System Switching Valve Stuck Closed Bank 2 - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Has your vehicle recently logged a P2443 trouble code? 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