{"id":1425,"date":"2025-10-08T06:02:58","date_gmt":"2025-10-08T06:02:58","guid":{"rendered":"https:\/\/www.way.com\/ask\/?p=1425"},"modified":"2025-10-08T06:02:58","modified_gmt":"2025-10-08T06:02:58","slug":"how-to-clean-a-catalytic-converter","status":"publish","type":"post","link":"https:\/\/www.way.com\/ask\/how-to-clean-a-catalytic-converter\/","title":{"rendered":"How to clean a catalytic converter\u00a0"},"content":{"rendered":"<h3><b><span data-contrast=\"none\">Step 1: Look out for the symptoms<\/span><\/b><span data-ccp-props=\"{}\">\u00a0<\/span><\/h3>\n<p><span data-contrast=\"none\">If you see one or more of these symptoms, chances are your catalytic converter is suffering. Seek professional help to diagnose the problem if you encounter any of these issues in your car:<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<ul>\n<li><span data-contrast=\"none\">The stench of a rotten egg <\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"none\">Starts that are difficult to manage <\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"none\">Sluggish acceleration <\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"none\">Power loss and poor fuel efficiency<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"none\">Or the DTC P0420<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/li>\n<\/ul>\n<h3><b><span data-contrast=\"none\">Step 2<\/span><\/b><span data-contrast=\"none\">: <\/span><b><span data-contrast=\"none\">Find the cause<\/span><\/b><span data-ccp-props=\"{}\">\u00a0<\/span><\/h3>\n<p><span data-contrast=\"none\">Finding the root of the problem is as important as fixing the issue. Any of the following issues could be causing your catalytic converter to work inefficiently:<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<ul>\n<li><span data-contrast=\"none\">Improper Fuel-To-Air Ratio causing carbon build-up<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"none\">Bad Oxygen\/Lambda Detection<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"none\">Damaged internal or external components could also be the culprit.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/li>\n<\/ul>\n<h3><b><span data-contrast=\"none\">Step 3: Cleaning the catalytic converter<\/span><\/b><span data-ccp-props=\"{}\">\u00a0<\/span><\/h3>\n<p><span data-contrast=\"none\">If the cause is anything other than internal or external physical damage, you can save the converter with a proper clean up. You can either clean it with dish soap or use a catalytic converter cleaner. <\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">Cleaning with dish soap involves;<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<ul>\n<li><span data-contrast=\"none\">Removing the vehicle&#8217;s catalytic converter with the proper tools.\u00a0<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:0,&quot;335559739&quot;:0}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"none\">Add dish soap and water to a large bucket.\u00a0<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:0,&quot;335559739&quot;:0}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"none\">Soak the dismantled catalytic converter in the bucket overnight. <\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:0,&quot;335559739&quot;:0}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"none\">Make sure that the converter&#8217;s honeycomb is free of debris. \u00a0<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:0,&quot;335559739&quot;:0}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"none\">Once it&#8217;s free of debris and dirt, replace the catalytic converter and reassemble the exhaust system.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:0,&quot;335559739&quot;:0}\">\u00a0<\/span><\/li>\n<\/ul>\n<p><span data-contrast=\"none\">You can also use a cleaner to clean the buildup. However, make sure that the car&#8217;s fuel tank is only 1\/4 full. Next,<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559685&quot;:0,&quot;335559738&quot;:0,&quot;335559739&quot;:0}\">\u00a0<\/span><\/p>\n<ul>\n<li><span data-contrast=\"none\">Add cleaner to clean the fuel tank (The amount required will vary according to the type of cleaner used).<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:0,&quot;335559739&quot;:0}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"none\">Drive for 10 to 15 miles at a reasonable speed. The cleaner will mix with your fuel and break down any buildup.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335551550&quot;:0,&quot;335551620&quot;:0,&quot;335559738&quot;:0,&quot;335559739&quot;:0}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"none\">Continue driving as normal after you&#8217;ve refilled your gas tank.<\/span><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Step 1: Look out for the symptoms\u00a0 If you see one or more of these symptoms, chances are your catalytic converter is suffering. Seek professional help to diagnose the problem if you encounter any of these issues in your car:\u00a0 The stench of a rotten egg \u00a0 Starts that are difficult to manage \u00a0 Sluggish&hellip; <a class=\"more-link\" href=\"https:\/\/www.way.com\/ask\/how-to-clean-a-catalytic-converter\/\">Continue reading <span class=\"screen-reader-text\">How to clean a catalytic converter\u00a0<\/span><\/a><\/p>\n","protected":false},"author":11,"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-1425","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>How to clean a catalytic converter\u00a0 - ask<\/title>\n<meta name=\"description\" content=\"Cleaning a catalytic converter is the most cost-effective method. 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