{"id":1335,"date":"2025-09-24T09:41:26","date_gmt":"2025-09-24T09:41:26","guid":{"rendered":"https:\/\/www.way.com\/ask\/?p=1335"},"modified":"2025-09-24T09:41:26","modified_gmt":"2025-09-24T09:41:26","slug":"p0505-code","status":"publish","type":"post","link":"https:\/\/www.way.com\/ask\/p0505-code\/","title":{"rendered":"What does code P0505 mean?"},"content":{"rendered":"<p>In older cars, the IAC is located on or close to the throttle body. The IAC regulates your car\u2019s idle speed, measuring the amount of air passing through the throttle plate\u2019s throat. The throttle plate closes when your car idles, decreasing the amount of air reaching the engine. Then, the powertrain control module (PCM) permits the car to maintain its idling speed by opening the bypass air channel.<\/p>\n<p>The PCM logs this error code when there\u2019s an issue with the IAC\u2019s response, like a general problem or a problem with the car\u2019s RPM being lower or higher than what the car expects.<\/p>\n<h2>What are the symptoms of a P0505 code?<\/h2>\n<p>The most obvious symptom is an illuminated check engine light. The following are some other symptoms you can observe when this code activates.<\/p>\n<ul>\n<li>The engine stalls while idling<\/li>\n<li>Low or high idle speed<\/li>\n<li>Issue starting your car<\/li>\n<li>Irregular idle speed<\/li>\n<\/ul>\n<figure id=\"attachment_1336\" aria-describedby=\"caption-attachment-1336\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1336\" src=\"https:\/\/www.way.com\/ask\/wp-content\/uploads\/2025\/09\/P0505-code.jpg\" alt=\"P0505 code\" width=\"800\" height=\"534\" \/><figcaption id=\"caption-attachment-1336\" class=\"wp-caption-text\"><em>Image by <a href=\"https:\/\/www.freepik.com\/premium-photo\/side-view-man-sitting-car_125093621.htm#fromView=search&amp;page=1&amp;position=15&amp;uuid=492e44be-de9e-417d-80bd-bb8ca1b8800c&amp;query=mechanic+using+obd+tool\" target=\"_blank\" rel=\"noopener\">EyeEm\/Freepik<\/a><\/em><\/figcaption><\/figure>\n<h2>What can cause a P0505 code?<\/h2>\n<p>These are some of the main reasons why the code shows up in your car.<\/p>\n<ul>\n<li>Defective idle air control (IAC) valve<\/li>\n<li>Vacuum leakage<\/li>\n<li>Broken wires or poor connections<\/li>\n<li>Idle speed is out of calibration<\/li>\n<li>Faulty PCM<\/li>\n<\/ul>\n<h2>How to fix code P0505<\/h2>\n<p>These are some steps to fix this engine error code.<\/p>\n<ul>\n<li>If defective or dirty, clean or change the idle air control valve.<\/li>\n<li>Repair or change the faulty vacuum hoses or intake parts.<\/li>\n<li>If broken or corroded, repair or replace the wiring or connectors.<\/li>\n<li>Reprogram or change the PCM if it is faulty.<\/li>\n<li>Then, clear the code and test drive the car to ensure there are no signs of the code.<\/li>\n<\/ul>\n<h2>Can you drive with a P0505 code?<\/h2>\n<p><strong>Though you can technically drive with this error code, we don\u2019t recommend it. The error code can cause engine stalling, irregular idling, and a decrease in engine performance, possibly causing dangerous driving conditions.<\/strong> Code P0505 repair cost can start at $50 and can go up to or more than $1,000 based on the type of repair.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In older cars, the IAC is located on or close to the throttle body. The IAC regulates your car\u2019s idle speed, measuring the amount of air passing through the throttle plate\u2019s throat. The throttle plate closes when your car idles, decreasing the amount of air reaching the engine. Then, the powertrain control module (PCM) permits&hellip; <a class=\"more-link\" href=\"https:\/\/www.way.com\/ask\/p0505-code\/\">Continue reading <span class=\"screen-reader-text\">What does code P0505 mean?<\/span><\/a><\/p>\n","protected":false},"author":14,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1335","post","type-post","status-publish","format-standard","hentry","category-car-repair-maintenance","entry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What does code P0505 mean?<\/title>\n<meta name=\"description\" content=\"What does code P0505 mean? How serious is this error code? What are its signs and causes? How do I fix code P0505? 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