{"id":44275,"date":"2022-07-27T05:47:44","date_gmt":"2022-07-27T05:47:44","guid":{"rendered":" https:\/\/dev.way.com\/blog\/?p=44275"},"modified":"2022-07-27T05:52:11","modified_gmt":"2022-07-27T05:52:11","slug":"how-to-fix-a-p0418-code-causes-symptoms-and-cost","status":"publish","type":"post","link":"https:\/\/dev.way.com\/journal\/how-to-fix-a-p0418-code-causes-symptoms-and-cost\/","title":{"rendered":"How to Fix a P0418 Code \u2013 Causes, Symptoms and Cost"},"content":{"rendered":"<p style=\"text-align: center;\"><em>P0418 is a fault code that refers to a problem with the control circuit for the secondary air injection system. Continue reading to find out more.<\/em><\/p>\n<p><span data-preserver-spaces=\"true\">Different systems make up modern vehicles, and they all work together to keep your ride functioning properly. For example, to lower emissions, the secondary air injection (SAI) system&#8217;s function is to pump new air into the exhaust stream. In addition, this technology aids the catalytic converter in many automobiles in reaching operational temperature as soon as the engine is started.<\/span><\/p>\n<p><a href=\"http:\/\/www.way.com\/way-plus\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-44278 size-large\" src=\"https:\/\/blog.way.com\/wp-content\/uploads\/2022\/07\/EarnWay-1024x379.jpg\" alt=\"Code P0418\" width=\"640\" height=\"237\" srcset=\"http:\/\/wordwblog02.way.com\/wp-content\/uploads\/2022\/07\/EarnWay-1024x379.jpg 1024w, http:\/\/wordwblog02.way.com\/wp-content\/uploads\/2022\/07\/EarnWay-300x111.jpg 300w, http:\/\/wordwblog02.way.com\/wp-content\/uploads\/2022\/07\/EarnWay-768x284.jpg 768w, http:\/\/wordwblog02.way.com\/wp-content\/uploads\/2022\/07\/EarnWay-1536x569.jpg 1536w, http:\/\/wordwblog02.way.com\/wp-content\/uploads\/2022\/07\/EarnWay-2048x758.jpg 2048w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/a><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #e71346;color:#e71346\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #e71346;color:#e71346\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/dev.way.com\/journal\/how-to-fix-a-p0418-code-causes-symptoms-and-cost\/#What_does_Code_P0418_mean\" >What does Code P0418 mean?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/dev.way.com\/journal\/how-to-fix-a-p0418-code-causes-symptoms-and-cost\/#How_the_SAI_System_Works\" >How the SAI System Works<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/dev.way.com\/journal\/how-to-fix-a-p0418-code-causes-symptoms-and-cost\/#What_causes_Code_P0418\" >What causes Code P0418?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/dev.way.com\/journal\/how-to-fix-a-p0418-code-causes-symptoms-and-cost\/#What_are_the_Symptoms_of_Code_P0418\" >What are the Symptoms of Code P0418?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/dev.way.com\/journal\/how-to-fix-a-p0418-code-causes-symptoms-and-cost\/#Steps_to_Diagnose_for_P0418\" >Steps to Diagnose for P0418<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/dev.way.com\/journal\/how-to-fix-a-p0418-code-causes-symptoms-and-cost\/#What_to_avoid_when_checking_for_Code_P0418\" >What to avoid when checking for Code P0418?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/dev.way.com\/journal\/how-to-fix-a-p0418-code-causes-symptoms-and-cost\/#How_serious_is_code_P0418\" >How serious is code P0418?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/dev.way.com\/journal\/how-to-fix-a-p0418-code-causes-symptoms-and-cost\/#How_to_Fix_P0418_code\" >How to Fix P0418 code?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/dev.way.com\/journal\/how-to-fix-a-p0418-code-causes-symptoms-and-cost\/#Cost_of_repairing_a_P0418_issue\" >Cost of repairing a P0418 issue<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_does_Code_P0418_mean\"><\/span><span data-preserver-spaces=\"true\">What does Code P0418 mean?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span data-preserver-spaces=\"true\">P0418 is the &#8220;Secondary Air Injection System Control &#8220;A&#8221; Circuit&#8221; Diagnostic trouble code (DTC). The A designation may refer to a particular circuit within the system or the whole circuit.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_the_SAI_System_Works\"><\/span>How the SAI System Works<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span data-preserver-spaces=\"true\">Some cars include an SAI system that uses oxidation to minimize hazardous emissions. Either an electric pump or a belt-driven pump is included in this arrangement. This pump pulls ambient air, slightly compresses it, and then pumps the pressured air into the catalytic converter or exhaust manifolds. Your car&#8217;s powertrain control module (PCM) regulates and distributes air properly by controlling valves.<\/span><\/p>\n<p><span data-preserver-spaces=\"true\">The PCM uses input voltage signals to track changes in air pressure. The PCM will set off the P0418 code when it notices a voltage signal from the SAI control circuit that is inconsistent with expectations.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_causes_Code_P0418\"><\/span><span data-preserver-spaces=\"true\">What causes Code P0418?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li><span data-preserver-spaces=\"true\">Defective SAI pump relay<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Difficulties with the wiring or connectors<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Failure of the SAI pump<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">The fused SAI system blows.<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">A problem with the PCM, such as outdated software<\/span><\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"What_are_the_Symptoms_of_Code_P0418\"><\/span><span data-preserver-spaces=\"true\">What are the Symptoms of Code P0418?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span data-preserver-spaces=\"true\">Engine hesitancy when accelerating and stalling at startup and while idling are signs of this code. The secondary air injection system&#8217;s components making unusual noises is another sign of something wrong.<\/span><\/p>\n<p><span data-preserver-spaces=\"true\">While there isn&#8217;t always a pressing need to fix the P0418 error, it is crucial to do so. Keep in mind that exhaust emissions contribute to air pollution.\u00a0<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-44280 size-large\" src=\"https:\/\/blog.way.com\/wp-content\/uploads\/2022\/07\/sign-g0e56c9ca3_1280-min-1024x682.jpg\" alt=\"Symptoms of Code P0418\" width=\"640\" height=\"426\" srcset=\"http:\/\/wordwblog02.way.com\/wp-content\/uploads\/2022\/07\/sign-g0e56c9ca3_1280-min-1024x682.jpg 1024w, http:\/\/wordwblog02.way.com\/wp-content\/uploads\/2022\/07\/sign-g0e56c9ca3_1280-min-300x200.jpg 300w, http:\/\/wordwblog02.way.com\/wp-content\/uploads\/2022\/07\/sign-g0e56c9ca3_1280-min-768x512.jpg 768w, http:\/\/wordwblog02.way.com\/wp-content\/uploads\/2022\/07\/sign-g0e56c9ca3_1280-min-600x400.jpg 600w, http:\/\/wordwblog02.way.com\/wp-content\/uploads\/2022\/07\/sign-g0e56c9ca3_1280-min.jpg 1280w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Steps_to_Diagnose_for_P0418\"><\/span><span data-preserver-spaces=\"true\">Steps to Diagnose for P0418<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span data-preserver-spaces=\"true\">Because DTC P0418 is a generic powertrain code, it can be recorded on various cars. However, keep in mind that depending on the car you own, the methods for diagnosis and repair may change. For instance, the diagnostic steps for a P0418 code in a Toyota Tundra and a P0418 code in a VW Jetta may differ.<\/span><\/p>\n<p><span data-preserver-spaces=\"true\">Bring your car to a professional to ensure the correct procedures are followed if you&#8217;re not yet confident in your DIY abilities.<\/span><\/p>\n<p><img decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/media1.giphy.com\/media\/qRVDIxBnu57gP0Jkg6\/giphy.gif?cid=790b761172242c5c58531a075b2e6d36d8d9e5fcef974843&amp;rid=giphy.gif&amp;ct=g\" alt=\"ODE Willie's Funky Bunch GIF\" \/><\/p>\n<p style=\"text-align: center;\">via GIPHY<\/p>\n<p><span data-preserver-spaces=\"true\">The mechanic needs a digital volt\/ohmmeter and a sophisticated scanner to diagnose a P0418 fault code. The mechanic must additionally use this equipment and do the following actions when diagnosing:<\/span><\/p>\n<ul>\n<li><span data-preserver-spaces=\"true\">Verify the one-way check valves are still functioning properly by inspecting them. To do this, the mechanic must remove the check valve and blow through it in both directions. The check valve should only allow one airflow direction if functioning properly.<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Check for damage to any wiring, connectors, and components.<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Examine each fitting and pipe in the secondary air injection system visually. Any cracking, breaking, or the mechanic should check for other damage.<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Examine the secondary air injection system&#8217;s fuse panel. The mechanic can use the manufacturer&#8217;s service handbook to locate fuses.<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Examine the secondary air injector pump for failure if the fuses continue to blow after being replaced.<\/span><\/li>\n<\/ul>\n<p><span data-preserver-spaces=\"true\">If the code reappears, try clearing it and giving the car a test drive.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_to_avoid_when_checking_for_Code_P0418\"><\/span><span data-preserver-spaces=\"true\">What to avoid when checking for Code P0418?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span data-preserver-spaces=\"true\">When changing a secondary air injection pump that has been broken, mechanics frequently forget to drain any extra water from the pump housing.\u00a0<\/span><\/p>\n<p><span data-preserver-spaces=\"true\">As a result, the pump freezes when exposed to cold temperatures, binding up and failing again.\u00a0<\/span><\/p>\n<p><img decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/media4.giphy.com\/media\/ZXLyv83rDhL44\/giphy.gif?cid=ecf05e478et5pn1809qx4fr9ph8a31p24ajqwzxe5qho1dpv&amp;rid=giphy.gif&amp;ct=g\" alt=\"oh GIF\" \/><\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/giphy.com\/gifs\/ZXLyv83rDhL44\">via GIPHY<\/a><\/p>\n<p><span data-preserver-spaces=\"true\">If a mechanic doesn&#8217;t check and replace a broken one-way check valve, moisture can build up, which causes the pump to malfunction once more when water permitted into the system freezes.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_serious_is_code_P0418\"><\/span><span data-preserver-spaces=\"true\">How serious is code P0418?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span data-preserver-spaces=\"true\">If this issue is not resolved before the cold winter arrives, the system&#8217;s water could freeze and bind the pump, leading to a failure. Higher emissions come from the concerned vehicle due to secondary air injection pump failure.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_to_Fix_P0418_code\"><\/span><span data-preserver-spaces=\"true\">How to Fix P0418 code?<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span data-preserver-spaces=\"true\">Fixing a P0418 error code is difficult, especially if you lack the necessary equipment and technical know-how. If you don&#8217;t have any experience working on exhaust systems or cars, you should take your car to the nearest shop and have a licensed mechanic work on it.\u00a0<\/span><\/p>\n<p><span data-preserver-spaces=\"true\">Make sure you do your study and read the instructions before performing any repairs if you intend to handle the job yourself.<\/span><\/p>\n<p><img decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/media2.giphy.com\/media\/l2Je06tbeJ2ZCfGNO\/giphy.gif?cid=790b761184702c9314c828abe350f7a5f41bcc321d307392&amp;rid=giphy.gif&amp;ct=g\" alt=\"Homer Simpson GIF\" \/><\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/giphy.com\/gifs\/season-10-the-simpsons-10x8-l2Je06tbeJ2ZCfGNO\">via GIPHY<\/a><\/p>\n<p><span data-preserver-spaces=\"true\">If the wiring, connectors, or components of the secondary air injection system are determined to be flawed, the mechanic should carry out the following repairs to eliminate a P0418 trouble code:<\/span><\/p>\n<ul>\n<li><span data-preserver-spaces=\"true\">If the one-way check valves are not operating properly, replace them.<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">Replace any wire or connectors that are faulty or damaged.<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">To prevent the secondary air injection system&#8217;s fuses from blowing again, replace those that have already done so.<\/span><\/li>\n<li><span data-preserver-spaces=\"true\">If additional testing reveals that the secondary air injection pump is the problem, replace it.<\/span><\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Cost_of_repairing_a_P0418_issue\"><\/span><span data-preserver-spaces=\"true\">Cost of repairing a P0418 issue<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span data-preserver-spaces=\"true\">P0418 stands for &#8220;Secondary Air Injection System Relay A circuit Malfunction,&#8221; a diagnostic trouble code (DTC). Numerous things can cause this. Thus a mechanic must identify the precise cause in your case to clear the code. For $120, a licensed mechanic will perform a check engine light diagnostic at your house or place of business. In addition, you will receive an upfront estimate for the suggested fix.<\/span><\/p>\n<hr \/>\n<p style=\"text-align: center;\"><em><span data-preserver-spaces=\"true\">Here&#8217;s more info on\u00a0<\/span><\/em><a class=\"editor-rtfLink\" href=\"https:\/\/www.way.com\/airport-parking\" target=\"_blank\" rel=\"noopener\"><em><span data-preserver-spaces=\"true\">top-rated airport parking<\/span><\/em><\/a><em><span data-preserver-spaces=\"true\">,\u00a0<\/span><\/em><a class=\"editor-rtfLink\" href=\"https:\/\/www.way.com\/cities\" target=\"_blank\" rel=\"noopener\"><em><span data-preserver-spaces=\"true\">the best parking spots in your city<\/span><\/em><\/a><em><span data-preserver-spaces=\"true\">, affordable\u00a0<\/span><\/em><a class=\"editor-rtfLink\" href=\"https:\/\/www.way.com\/auto-insurance\" target=\"_blank\" rel=\"noopener\"><em><span data-preserver-spaces=\"true\">auto insurance<\/span><\/em><\/a><em><span data-preserver-spaces=\"true\">, easy\u00a0<\/span><\/em><a class=\"editor-rtfLink\" href=\"https:\/\/www.way.com\/auto-refinance\" target=\"_blank\" rel=\"noopener\"><em><span data-preserver-spaces=\"true\">auto refinance<\/span><\/em><\/a><em><span data-preserver-spaces=\"true\">, and\u00a0<\/span><\/em><a class=\"editor-rtfLink\" href=\"https:\/\/www.way.com\/car-wash-near-me\" target=\"_blank\" rel=\"noopener\"><em><span data-preserver-spaces=\"true\">high-quality car washes near you<\/span><\/em><\/a><em><span data-preserver-spaces=\"true\">.<\/span><\/em><\/p>\n<hr \/>\n<p style=\"text-align: center;\">\n","protected":false},"excerpt":{"rendered":"<p>P0418 is a fault code that refers to a problem with the control circuit for the secondary air injection system. Continue reading to find out more. Different systems make up modern vehicles, and they all work together to keep your ride functioning properly. For example, to lower emissions, the secondary air injection (SAI) system&#8217;s function&hellip; <a class=\"more-link\" href=\"https:\/\/dev.way.com\/journal\/how-to-fix-a-p0418-code-causes-symptoms-and-cost\/\">Continue reading <span class=\"screen-reader-text\">How to Fix a P0418 Code \u2013 Causes, Symptoms and Cost<\/span><\/a><\/p>\n","protected":false},"author":46,"featured_media":44279,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[5676,1079,2862],"tags":[],"class_list":["post-44275","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-engine-codes","category-car-services","category-expert-corner","entry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.3 (Yoast SEO v28.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>P0418 Code: What to know and How to go about it<\/title>\n<meta name=\"description\" content=\"P0418 is a fault code that refers to a problem with the control circuit for the secondary air injection system. 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