{"id":127512,"date":"2024-09-12T11:33:56","date_gmt":"2024-09-12T11:33:56","guid":{"rendered":"https:\/\/www.dubizzle.com\/blog\/cars\/?p=127512"},"modified":"2024-09-23T10:27:45","modified_gmt":"2024-09-23T10:27:45","slug":"catalytic-converter-failure","status":"publish","type":"post","link":"https:\/\/www.dubizzle.com\/blog\/cars\/catalytic-converter-failure\/","title":{"rendered":"Catalytic Converter Failure: Causes and Fixes"},"content":{"rendered":"\n<ul class=\"wp-block-list\"><li><a href=\"#h-catalytic-converter-failure-causes\">Catalytic Converter Failure Causes<\/a><\/li><li><a href=\"#h-how-to-fix-a-bad-catalytic-converter\">Catalytic Converter Failure Fixes<\/a><\/li><li><a href=\"#h-faqs\">FAQs<\/a><\/li><\/ul>\n\n\n\n<p>A smooth functioning catalytic converter is essential for a vehicle\u2019s performance. It is responsible for reducing harmful emissions generated during the combustion process and converting them into safer elements. But what happens if it fails? Catalytic converter failure can lead to several issues. For instance, increased pollution, overheating and reduced engine performance, among others.<\/p>\n\n\n\n<p>Let\u2019s explore the common causes of catalytic converter failure and its solutions. Understanding the reasons behind these issues and their preventive measures will allow car owners to keep their vehicles in top shape and avoid such issues.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-catalytic-converter-failure-causes\"><strong>Catalytic Converter Failure Causes<\/strong><\/h2>\n\n\n\n<p>A <a href=\"https:\/\/www.dubizzle.com\/blog\/cars\/catalytic-converter\/\" target=\"_blank\" rel=\"noreferrer noopener\">catalytic converter<\/a> may fail due to various reasons. Some common catalytic converter failing symptoms and causes are as follows.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-bad-spark-plugs-or-spark-plug-wires\"><strong>Bad Spark Plugs or Spark Plug Wires<\/strong><\/h3>\n\n\n\n<p>A <a href=\"https:\/\/www.dubizzle.com\/blog\/cars\/bad-spark-plug-symptoms\/\" target=\"_blank\" rel=\"noreferrer noopener\">bad spark plug<\/a> that misfires or doesn\u2019t fire at all leads to unburned fuel entering the exhaust system. This unburned fuel can ignite in the converter due to extremely high temperatures. This can cause the ceramic catalyst to overheat and melt, leading to complete or partial catalytic converter failure.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-oil-or-antifreeze-entering-the-exhaust-system\"><strong>Oil or Antifreeze Entering the Exhaust System<\/strong><\/h3>\n\n\n\n<p>If oil or antifreeze enters the <a href=\"https:\/\/www.dubizzle.com\/blog\/cars\/car-exhaust-system\/\" target=\"_blank\" rel=\"noreferrer noopener\">exhaust system<\/a>, it forms soot and carbon deposits in the converter. These deposits then coat and clog the air passages in the catalytic converter\u2019s ceramic honeycomb. This leads to two major issues.<\/p>\n\n\n\n<p>Firstly, the carbon deposits prevent the catalytic converter from effectively removing harmful emissions from the exhaust flow. Secondly, the clogged pores in the ceramic catalyst restrict the exhaust flow. As a result, back pressure is elevated. This increased back pressure causes exhaust gases and heat to back up into the engine, which may lead to engine damage.<\/p>\n\n\n\n<p>Secondly, burnt exhaust gases may be pulled back into the combustion chamber potentially reducing power. This overheats several <a href=\"https:\/\/www.dubizzle.com\/blog\/cars\/car-engine-parts-types\/\" target=\"_blank\" rel=\"noreferrer noopener\">engine components<\/a> and decreases the next combustion cycle\u2019s efficiency. Some causes of this problem could be connected to failing gaskets, worn-out <a href=\"https:\/\/www.dubizzle.com\/blog\/cars\/piston-rings\/\" target=\"_blank\" rel=\"noreferrer noopener\">piston rings<\/a>, faulty valves or other warped engine components. This may lead to a failed catalytic converter.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-road-structural-damage\"><strong>Road \/ Structural Damage<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"640\" src=\"https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102404\/Untitled-design-37-1024x640.jpg\" alt=\"Accidents, potholes and road debris can lead to catalytic converter damage\" class=\"wp-image-128308\" srcset=\"https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102404\/Untitled-design-37-1024x640.jpg 1024w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102404\/Untitled-design-37-300x188.jpg 300w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102404\/Untitled-design-37-768x480.jpg 768w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102404\/Untitled-design-37-640x400.jpg 640w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102404\/Untitled-design-37-421x263.jpg 421w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102404\/Untitled-design-37-558x349.jpg 558w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102404\/Untitled-design-37-363x227.jpg 363w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102404\/Untitled-design-37-250x156.jpg 250w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102404\/Untitled-design-37-368x230.jpg 368w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102404\/Untitled-design-37-774x484.jpg 774w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102404\/Untitled-design-37-672x420.jpg 672w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102404\/Untitled-design-37-437x273.jpg 437w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102404\/Untitled-design-37-301x188.jpg 301w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102404\/Untitled-design-37-240x150.jpg 240w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102404\/Untitled-design-37-771x482.jpg 771w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102404\/Untitled-design-37-669x418.jpg 669w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102404\/Untitled-design-37-435x272.jpg 435w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>Corrosion, structural damage and other issues can cause catalytic converter damage<\/figcaption><\/figure>\n\n\n\n<p>The catalytic converter is located underneath the car \u2013 typically under the front seats &#8211; and contains a lightweight and fragile ceramic honeycomb structure. This ceramic honeycomb is protected by an insulated mat that holds it in place. Its location makes it vulnerable to damage due to accidents, curbs and more.<\/p>\n\n\n\n<p>Constant impact on the converter due to potholes, road debris, speed bumps, <a href=\"https:\/\/www.dubizzle.com\/blog\/cars\/off-road-guide\/\" target=\"_blank\" rel=\"noreferrer noopener\">off-road driving<\/a> or other obstructions can damage the structure of the converter. A severe impact can also rupture the ceramic catalyst, which causes the pieces to break off and rattle inside the converter. The broken pieces interrupt the exhaust flow leading to loss of power and heat buildup.<\/p>\n\n\n\n<p>Moreover, issues like stress fractures, thermal shock, corrosion and stripped oxygen sensor threads may also lead to catalytic converter failure. All these problems usually require converter replacement. Any damage to the tailpipe or muffler may also affect the converter. Case in point: it will raise the internal temperature, elevate back pressure and compromise the overall function.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-unburned-fuel-entering-the-exhaust-system\"><strong>Unburned Fuel Entering the Exhaust System<\/strong><\/h3>\n\n\n\n<p>Ideally, all fuel must be burned in the engine\u2019s <a href=\"https:\/\/www.dubizzle.com\/blog\/cars\/combustion-chamber-parts\/\" target=\"_blank\" rel=\"noreferrer noopener\">combustion chamber<\/a>. However, any unburned fuel that passes through the exhaust system may be a cause for concern. Once this fuel reaches the catalytic converter, it can ignite due to the high temperature. The ignition can overheat the converter beyond its limits and possibly cause it to melt. This meltdown may be caused by worn-out spark plugs, improper <a href=\"https:\/\/www.dubizzle.com\/blog\/cars\/air-fuel-ratio\/\" target=\"_blank\" rel=\"noreferrer noopener\">air-fuel mixture<\/a>, faulty oxygen sensor, malfunctioning fuel injector, timing issues, broken check valve or a sticking float.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-oxygen-sensor-not-functioning-properly\"><strong>Oxygen Sensor Not Functioning Properly<\/strong><\/h3>\n\n\n\n<p>A malfunctioning or <a href=\"https:\/\/www.dubizzle.com\/blog\/cars\/oxygen-sensor-fault-symptoms\/\" target=\"_blank\" rel=\"noreferrer noopener\">faulty oxygen sensor<\/a> can send inaccurate readings of the exhaust gases to the vehicle\u2019s computer (ECU or ECM). This can lead to an improper fuel mixture \u2013 too lean or too rich. A fuel mixture that is too rich in fuel may leave behind unburned fuel in the converter, causing it to ignite and the converter to overheat and eventually melt. Whereas, a fuel mixture that is too lean may affect the converter\u2019s ability to convert hydrocarbons into safer elements. In both of these scenarios, the emission levels will be problematic.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-short-trips\"><strong>Short Trips<\/strong><\/h3>\n\n\n\n<p>Shockingly, taking short trips around town can also damage the catalytic converter. Short drives do not allow the converter to reach the appropriate temperature needed to convert hydrocarbons into safer materials. Over time this can clog the convertor due to the buildup of deposits. Occasional long rides prevent this from happening as it gives the catalytic converter enough time to perform efficient functions and clear out any deposits.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-improper-installation\"><strong>Improper Installation<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"640\" src=\"https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102415\/Untitled-design-36-1024x640.jpg\" alt=\"Improper installation causes early wear and tear and can lead to catalytic converter failure\" class=\"wp-image-128309\" srcset=\"https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102415\/Untitled-design-36-1024x640.jpg 1024w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102415\/Untitled-design-36-300x188.jpg 300w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102415\/Untitled-design-36-768x480.jpg 768w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102415\/Untitled-design-36-640x400.jpg 640w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102415\/Untitled-design-36-421x263.jpg 421w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102415\/Untitled-design-36-558x349.jpg 558w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102415\/Untitled-design-36-363x227.jpg 363w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102415\/Untitled-design-36-250x156.jpg 250w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102415\/Untitled-design-36-368x230.jpg 368w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102415\/Untitled-design-36-774x484.jpg 774w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102415\/Untitled-design-36-672x420.jpg 672w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102415\/Untitled-design-36-437x273.jpg 437w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102415\/Untitled-design-36-301x188.jpg 301w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102415\/Untitled-design-36-240x150.jpg 240w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102415\/Untitled-design-36-771x482.jpg 771w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102415\/Untitled-design-36-669x418.jpg 669w, https:\/\/d2hucwwplm5rxi.cloudfront.net\/wp-content\/uploads\/2024\/09\/23102415\/Untitled-design-36-435x272.jpg 435w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>Proper installation is necessary to ensure that the converter works smoothly<\/figcaption><\/figure>\n\n\n\n<p>Lastly, improper installation of the catalytic converter can also cause catalytic converter failure. A poorly installed converter is at risk of contamination and structure damage due to impacts on the undercarriage.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-how-to-fix-a-bad-catalytic-converter\"><strong>How to fix a bad catalytic converter?<\/strong><\/h2>\n\n\n\n<p>Repairing a catalytic converter is usually not possible. This is a crucial component of a car\u2019s exhaust system responsible for reducing harmful emissions. When it fails, it is typically because of two reasons \u2013 it is either clogged or damaged. Repairing a damaged converter is not practical or recommended in most cases.<\/p>\n\n\n\n<p>If the converter is clogged with carbon and soot deposits, cleaning the converter is worth a shot. However, it does not guarantee a fully functional converter afterwards. To clean the component, add a cleaner to the gas tank and wait for it to pass through the exhaust system. This ensures that all buildup has been removed. For a more thorough wash, remove the converter from the car and use a pressure washer to get rid of stubborn deposits.<\/p>\n\n\n\n<p>However, if the problem persists or the structure of the converter is damaged, replacing the component is the only option left. Contact a professional to change the catalytic converter and <a href=\"https:\/\/www.dubizzle.com\/blog\/cars\/car-exhaust-system-maintenance\/\" target=\"_blank\" rel=\"noreferrer noopener\">revive the exhaust system<\/a> of the vehicle.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-faqs\"><strong>FAQs<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-how-to-prevent-catalytic-converter-failure\"><strong>How to prevent catalytic converter failure?<\/strong><\/h3>\n\n\n\n<p>Regular preventative maintenance and checkups can prevent catalytic converter failure. It is recommended to inspect the catalytic converter as part of the <a href=\"https:\/\/www.dubizzle.com\/blog\/cars\/car-maintenance-checklist\/\" target=\"_blank\" rel=\"noreferrer noopener\">car maintenance checklist<\/a> to catch early signs of cat converter failure.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-can-a-catalytic-converter-be-cleaned\"><strong>Can a catalytic converter be cleaned?<\/strong><\/h3>\n\n\n\n<p>Adding a cleaner to the gas tank can clean the catalytic converter as the liquid passes through the car\u2019s exhaust system. For more comprehensive cleaning, remove the converter from the car and wash it thoroughly.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-can-oil-damage-a-catalytic-converter\"><strong>Can oil damage a catalytic converter?<\/strong><\/h3>\n\n\n\n<p>Yes, a large amount of engine oil in the converter can poison the catalyst surfaces. This will result in failure to reduce emissions and eventually damage the catalytic converter.<\/p>\n\n\n\n<p>Understanding the causes and fixes of a bad catalytic converter is important for avoiding catalytic converter failure and improving vehicle performance. Regular maintenance of all car components prevents any such issues and increases the life of a vehicle. However, if your vehicle is breaking down frequently leading to costly repairs, it might be time to consider an upgrade.<\/p>\n\n\n\n<p>Explore<a href=\"https:\/\/uae.dubizzle.com\/motors\/new-cars\/\" target=\"_blank\" rel=\"noreferrer noopener\"> new cars for sale in the UAE<\/a> and invest in a vehicle that will give you peace of mind and enhance your overall driving experience.<\/p>\n\n\n\n<p>Stay connected to<a href=\"https:\/\/www.dubizzle.com\/blog\/cars\/most-popular-used-lexus-suvs-in-the-uae\/\" target=\"_blank\" rel=\"noreferrer noopener\"> dubizzle\u2019s auto blog<\/a> to learn more about car components issues and their fixes.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The catalytic converter is an essential component of the exhaust system. Dive in to learn about catalytic converter failure causes and their fixes.<\/p>\n","protected":false},"author":54,"featured_media":127524,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"dubizzle-taxonomy-car-year":[],"dubizzle-taxonomy-body-type":[],"dubizzle-taxonomy-car-doors":[],"dubizzle-taxonomy-car-cylinders":[],"dubizzle-taxonomy-car-extras":[],"dubizzle-taxonomy-car-color":[],"dubizzle-taxonomy-car-fuel-type":[],"class_list":{"0":"post-127512","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-parts-repairs"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.0 (Yoast SEO v26.0) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Catalytic Converter Failure: Causes &amp; Fixes | dubizzle<\/title>\n<meta name=\"description\" content=\"Some common causes of catalytic converter failure may include structural damage and carbon and soot deposits in the converter.\" \/>\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.dubizzle.com\/blog\/cars\/catalytic-converter-failure\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Catalytic Converter Failure: Causes and Fixes\" \/>\n<meta property=\"og:description\" content=\"Some common causes of catalytic converter failure may include structural damage and carbon and soot deposits in the converter.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.dubizzle.com\/blog\/cars\/catalytic-converter-failure\/\" \/>\n<meta property=\"og:site_name\" content=\"UAE\u2019s leading autos blog | dubizzle Cars\" \/>\n<meta property=\"article:published_time\" content=\"2024-09-12T11:33:56+00:00\" \/>\n<meta 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