{"id":77186,"date":"2022-11-01T23:32:14","date_gmt":"2022-11-02T06:32:14","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=77186"},"modified":"2023-10-02T17:20:59","modified_gmt":"2023-10-03T00:20:59","slug":"p2257-code-secondary-air-injection-system-control-a-circuit-low","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p2257-code-secondary-air-injection-system-control-a-circuit-low\/","title":{"rendered":"P2257 Code: Secondary Air Injection System Control \u201cA\u201d Circuit Low"},"content":{"rendered":"<!DOCTYPE html PUBLIC \"-\/\/W3C\/\/DTD HTML 4.0 Transitional\/\/EN\" \"http:\/\/www.w3.org\/TR\/REC-html40\/loose.dtd\">\n<html><body><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 3<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column_81400d-14 > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_81400d-14 > .kt-inside-inner-col,.kadence-column_81400d-14 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column_81400d-14 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_81400d-14 > .kt-inside-inner-col{flex-direction:column;}.kadence-column_81400d-14 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_81400d-14 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_81400d-14{position:relative;}@media all and (max-width: 1024px){.kadence-column_81400d-14 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_81400d-14 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_81400d-14 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-87b281  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-bb3633\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_3932ba-3c, .wp-block-kadence-advancedheading.kt-adv-heading_3932ba-3c[data-kb-block=\"kb-adv-heading_3932ba-3c\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_3932ba-3c mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_3932ba-3c[data-kb-block=\"kb-adv-heading_3932ba-3c\"] mark.kt-highlight{font-family:Inter;font-weight:500;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading_3932ba-3c img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_3932ba-3c[data-kb-block=\"kb-adv-heading_3932ba-3c\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_3932ba-3c summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_3932ba-3c\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>Diagnostic trouble code (DTC) P2257 stands for &ldquo;Secondary Air Injection System Control &lsquo;A&rsquo; Circuit Low. This code triggers if the powertrain control module (PCM) detects a problem with the secondary air injection SAI system.<\/li><li>The P2257 code is caused by a failed secondary air pump or relay, a clogged vacuum hose, a faulty SAI valve, wiring issues, and PCM failure.&nbsp;<\/li><li>The common symptoms of the P2257 code include an illuminated check engine light or a disabled SAI system.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>The secondary air injection (SAI) system assists in the oxidizing process that occurs either at the <a href=\"https:\/\/www.carparts.com\/exhaust-manifold\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"exhaust manifold\">exhaust manifold<\/a> or <a href=\"https:\/\/www.carparts.com\/catalytic-converter\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"catalytic converter\">catalytic converter<\/a>. The system comes with a belt-driven or electrically-driven air pump mounted to the front of the engine, which pumps fresh air to each exhaust port. 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 SAI system, on-board diagnostics will log a P2257 code.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P2257 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) P2257 stands for &ldquo;Secondary Air Injection System Control &ldquo;A&rdquo; Circuit Low.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/11\/car-sai-pumps-in-white-background-1024x602.jpg\" alt=\"car sai pumps in white background\" class=\"wp-image-77187\" width=\"1024\" height=\"602\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/11\/car-sai-pumps-in-white-background-1024x602.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/11\/car-sai-pumps-in-white-background-300x176.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/11\/car-sai-pumps-in-white-background-768x452.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/11\/car-sai-pumps-in-white-background-1536x904.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/11\/car-sai-pumps-in-white-background-150x88.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/11\/car-sai-pumps-in-white-background.jpg 1700w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>In a typical SAI system, during cold engine startup and before the oxygen (O2) sensor reaches its operating temperature, the SAI pump directs airflow to the exhaust manifolds via one-way check valves.<\/figcaption><\/figure>\n\n\n\n<p>In a typical SAI system, during cold engine startup and before the <a href=\"https:\/\/www.carparts.com\/oxygen-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"oxygen (O2) sensor\">oxygen (O2) sensor<\/a> reaches its operating temperature, the <a href=\"https:\/\/www.carparts.com\/secondary-air-injection-pump\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"SAI pump\">SAI pump<\/a> directs airflow to the exhaust manifolds via one-way check valves. This prevents the exhaust gases from entering the switching solenoids and air pump.<\/p>\n\n\n\n<p>As the engine reaches a closed loop, airflow will be directed towards the catalytic converter.<\/p>\n\n\n\n<p>If the PCM detects the actual and desired states of the SAI control circuit do not match, it may set code P2259 in memory.<\/p>\n\n\n\n<p><strong><em>Note:<\/em><\/strong><em> The definition of code P2257 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 P2257 Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>Secondary air pump failure<\/li><li>Secondary air pump relay failure<\/li><li>Clogged or disconnected vacuum hose<\/li><li>Faulty SAI valve<\/li><li>Wiring issues<\/li><li><a href=\"https:\/\/www.carparts.com\/blog\/car-pcm-meaning-symptoms-of-failure-and-more\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Powertrain control module failure\">Powertrain control module failure<\/a><\/li><\/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 P2257 Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/www.carparts.com\/blog\/check-engine-light-flashing\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Illuminated check engine light\">Illuminated check engine light<\/a><\/li><li>Disabled secondary air injection system<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P2257 Code<\/h2>\n\n\n\n<p>DTC P2257 is a generic powertrain code that can be logged in vehicles with an OBD-II system. While this might be the case, keep in mind that the steps for diagnosis can vary depending on your vehicle&rsquo;s year, make, and model.<\/p>\n\n\n\n<p>Diagnosing this type of trouble code might require you to use a scan tool or inspect the affected system for signs of damage, which can be tricky if it&rsquo;s your first time. To get an accurate diagnosis, it&rsquo;s best to bring your vehicle to a certified professional. Otherwise, you can go ahead and do it yourself.<\/p>\n\n\n\n<p>To help you out, here&rsquo;s a short video that shows 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=\"Ford Fusion Code P0410 P0491 P2257 - Secondary Air Injection System Diagnosis\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/D0OqVzLRL_0?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 P2257 Code<\/h2>\n\n\n\n<p>Attempting to fix A p2257 code can be frustrating and confusing, especially without the right tools and technical information on automotive repair. If done incorrectly, your vehicle could even develop other problems, leading to expensive repair costs. To ensure that all steps and protocols are followed, it&rsquo;s best to bring your vehicle to the nearest auto repair shop and have a trained mechanic perform the necessary repairs.<\/p>\n\n\n\n<p>But if you&rsquo;ve had your fair share of resolving trouble codes before, then you already know that there&rsquo;s no such thing as a one-size-fits-all solution that will fix all trouble codes for all makes and models. So before you begin working on your vehicle, make sure to have the right repair manual. Guides like those from Chilton or an ALLDATA subscription contain vehicle-specific repair information, which will certainly come in handy while you work.<\/p>\n<\/body><\/html>\n","protected":false},"excerpt":{"rendered":"<p><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 3<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>The secondary air injection (SAI) system assists in the oxidizing process that occurs either at the exhaust manifold or catalytic&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p2257-code-secondary-air-injection-system-control-a-circuit-low\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":77188,"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":[1189,1323,1238,1190],"ppma_author":[2607,2855],"class_list":{"0":"post-77186","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-catalytic-converter-2","9":"tag-engine-control-module-2","10":"tag-exhaust-manifold-2","11":"tag-oxygen-sensor-2","12":"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>P2257 Code: Secondary Air Injection System Control \u201cA\u201d Circuit Low - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Find out what a P2257 code means and the most common causes and symptoms behind it.\" \/>\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\/p2257-code-secondary-air-injection-system-control-a-circuit-low\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P2257 Code: Secondary Air Injection System Control \u201cA\u201d Circuit Low - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Find out what a P2257 code means and the most common causes and symptoms behind it.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/p2257-code-secondary-air-injection-system-control-a-circuit-low\/\" \/>\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=\"2022-11-02T06:32:14+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-10-03T00:20:59+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/11\/two-mechanics-encounter-p2257-code.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2000\" \/>\n\t<meta property=\"og:image:height\" content=\"1331\" \/>\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=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p2257-code-secondary-air-injection-system-control-a-circuit-low\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p2257-code-secondary-air-injection-system-control-a-circuit-low\\\/\"},\"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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