{"id":184807,"date":"2025-10-20T23:06:39","date_gmt":"2025-10-21T06:06:39","guid":{"rendered":"https:\/\/www.carparts.com\/blog\/?p=184807"},"modified":"2025-10-20T23:06:41","modified_gmt":"2025-10-21T06:06:41","slug":"can-a-catalytic-converter-be-cleaned-what-works-what-doesnt-and-when-to-replace-quickref","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/can-a-catalytic-converter-be-cleaned-what-works-what-doesnt-and-when-to-replace-quickref\/","title":{"rendered":"Can a Catalytic Converter Be Cleaned? What Works, What Doesn\u2019t, and When to Replace"},"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\"> 6<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>\n<div class=\"summary-widget\">\n    <h3>Summary<\/h3>\n    <ul class=\"summary-grid\">\n            <li class=\"summary-grid-list\">\n            <div class=\"sm-item\">\n\n                                    <p class=\"sm-title\">\n                        A mildly fouled catalytic converter can often be cleaned without removal. Heat alone can burn off light soot, and fuel-tank additives may clear mild hydrocarbon or oil buildup. A converter that is melted, cracked, clogged, or contaminated with silicone cannot be restored and must be replaced.                    <\/p>\n                \n            <\/div>\n        <\/li>\n            <li class=\"summary-grid-list\">\n            <div class=\"sm-item\">\n\n                                    <p class=\"sm-title\">\n                        Cleaning only works when the converter is merely coated and the engine is otherwise healthy. Faults like misfires, exhaust leaks, or rich mixtures can falsely trigger converter codes. After treatment, a properly functioning converter will show flatter, lower-frequency downstream O&#8322; sensor readings during a hot drive.                    <\/p>\n                \n            <\/div>\n        <\/li>\n            <li class=\"summary-grid-list\">\n            <div class=\"sm-item\">\n\n                                    <p class=\"sm-title\">\n                        Replacement is necessary when backpressure is high, rattling is present, or O&#8322; data shows little to no conversion. Using EPA- or CARB-compliant parts is required, and removing or damaging the converter may be considered tampering under federal and state laws.                    <\/p>\n                \n            <\/div>\n        <\/li>\n        <\/ul>\n<\/div>\n\n\n\n\n\n<p><a href=\"https:\/\/www.carparts.com\/catalytic-converter\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Catalytic converters\">Catalytic converters<\/a> usually suffer weeks or months of rich mixtures, misfires, coolant or oil contamination before they stop working properly. The good news is that mild fouling can sometimes be reversed. But remember: no chemical can fix a melted, broken, or <a href=\"https:\/\/www.carparts.com\/blog\/how-to-tell-if-the-catalytic-converter-is-clogged\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"heavily clogged substrate\">heavily clogged substrate<\/a>. If this is your problem, you need to replace your catalytic converter.<\/p>\n\n\n\n<p>The wise thing to do is to hold off buying parts until you&rsquo;ve isolated the issue. Exhaust leaks, slow oxygen sensors, and upstream engine faults (misfires, fuel trim errors) can trick the ECU into blaming the converter. Whether or not to <a href=\"https:\/\/www.carparts.com\/blog\/bad-catalytic-converter-symptoms\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"replace your cat\">replace your cat<\/a> depends on correctly diagnosing these issues.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Can a catalytic converter be cleaned without removing it?<\/h2>\n\n\n\n<p><strong>If the issue is light hydrocarbon or oil soot, the heat of the catalyst will typically cook it to ash and it will be eliminated even without any kind of chemical additive. But in worse cases, a <a href=\"https:\/\/www.carparts.com\/search?q=catalytic_converter_cleaner&amp;refinements%5Bpart%5D=Exhaust_-and-_Fuel_System_Cleaner&amp;itemperpage=20&amp;currentpage=1&amp;sort=best-match\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"fuel-tank additive\">fuel-tank additive<\/a> may be used to clean the catalytic converter without removing it.<\/strong>&nbsp;<\/p>\n\n\n\n<p>These fuel tank additives can be effective for removing hydrocarbon and oil-based soot from a mildly coated catalytic converter. These products are designed to clean the entire fuel and exhaust system, including oxygen sensors and the converter itself.<\/p>\n\n\n\n<p>Note that once the problem that caused the issue is corrected, the catalyst will clean itself unless it has overheated to the point that the honeycomb is coated with something that can&rsquo;t be cleaned away.<\/p>\n\n\n\n<div class=\"pro-tip-widget\">\n\n    <div class=\"pro-tip-item\">\n        <figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/f_auto,dpr_auto,q_auto,c_pad\/carparts\/blog\/widgets\/protip\/services-icon\" alt=\", P0442 Code: Evaporative Emission Control System Leak Detected (Small Leak)\" class=\"kb-img\"><\/figure>\n    <\/div>\n\n    <div class=\"protip-desc\">\n        <div class=\"help-tip\">\n        <p><strong>Pro Tips<\/strong> are nuggets of information direct from ASE-certified automobile technicians working with CarParts.com, which may include unique, personal insights based on their years of experience working in the automotive industry. These can help you make more informed decisions about your car.<\/p>\n        <\/div>\n        <div class=\"help-caption\">\n            <p>\n                <strong>Pro Tip:<\/strong>\n                In the days when leaded fuel was still available for older cars, the lead would coat the catalyst. Leaded fuel is gone now, so that isn&rsquo;t an issue.            <\/p>\n        <\/div>\n    <\/div>\n\n<\/div>\n\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"669\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2025\/10\/catalytic-converter-honeycomb-catalyst-substrate-1024x669.jpg\" alt=\"catalytic converter honeycomb catalyst substrate\" class=\"wp-image-184808\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2025\/10\/catalytic-converter-honeycomb-catalyst-substrate-1024x669.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2025\/10\/catalytic-converter-honeycomb-catalyst-substrate-300x196.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2025\/10\/catalytic-converter-honeycomb-catalyst-substrate-768x502.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2025\/10\/catalytic-converter-honeycomb-catalyst-substrate-1536x1004.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2025\/10\/catalytic-converter-honeycomb-catalyst-substrate-150x98.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2025\/10\/catalytic-converter-honeycomb-catalyst-substrate.jpg 1600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">Cutaway of a catalytic converter showing the ceramic honeycomb catalyst substrate | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<p>If enough coolant containing silicone enters the exhaust system, it can coat both the oxygen sensors and the catalytic converter, rendering them ineffective and requiring replacement.<\/p>\n\n\n\n<p>The catalyst operates at high temperatures (up to 1,600&deg;F), but silicone compounds don&rsquo;t simply vaporize with heat. They oxidize and form glassy deposits that coat the precious metal surfaces (platinum, palladium, rhodium).<\/p>\n\n\n\n<p>These deposits block the chemical reactions needed to convert harmful gases. Once poisoned, the catalyst loses efficiency and cannot be restored by heat cycling.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Quick Test After Adding the Cleaner<\/h3>\n\n\n\n<p>After adding the catalytic converter cleaner, do a sustained hot drive. Aim for highway speeds for 15&ndash;30 minutes to get the converter fully hot. If the problem is just soot and fuel varnish from short-trip use, this method can sometimes restore flow. However, if the substrate is cracked, melted from misfires, or loaded with oil ash, don&rsquo;t expect this trick to work.<\/p>\n\n\n\n<p><strong><em>Warning:<\/em><\/strong><em> Before adding anything to the tank, diagnose the real cause. A rich mix or misfire that sent raw fuel into the cat will foul a freshly cleaned substrate again. Check fuel trims, misfire counters, and look for leaks ahead of the converter.<\/em><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Do catalytic converter cleaners work?<\/h2>\n\n\n\n<p>They can, within limits. Additives help when the converter is merely coated with carbon and the engine is otherwise healthy. However, they won&rsquo;t repair a collapsed cat or revive its precious metals that have been heat-damaged (catalytic converters contain precious metals that make them subject to theft).<\/p>\n\n\n\n<p>If you have the DIY knowledge and skill, verify the results after treatment. Log the upstream and downstream O&#8322; sensors during a steady highway drive. On a healthy converter, the downstream signal should be flatter and lower frequency than the upstream data. Otherwise, the converter is still not working properly.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Is a catalytic converter cleaner safe to use on my car?<\/h2>\n\n\n\n<p>Used as directed, leading brands of catalytic converter cleaners are formulated to be safe for O&#8322; sensors and catalytic substrates. These are typically solvent blends (often acetone, xylene, and light petroleum distillates), so follow the instructions and make sure to keep them away from ignition sources. Never exceed the recommended concentration.<\/p>\n\n\n\n<p><strong><em>Important<\/em><\/strong><em>: in some states, removing the catalytic converter for cleaning could be considered&nbsp; tampering. Federal rules also prohibit tampering and the sale of such devices. Never drill, chisel, or &ldquo;gut&rdquo; a catalytic converter.<\/em><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Use a Catalytic Converter Cleaner<\/h2>\n\n\n\n<p>Most catalytic converter cleaners must go into the <a href=\"https:\/\/www.carparts.com\/fuel-tank\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"fuel tank\">fuel tank<\/a> with the level around one-quarter to one-half full. Drive at steady highway speeds for 15&ndash;30 minutes to keep the converter hot; heat activates the formula and helps burn off deposits. Follow your product&rsquo;s instructions for exact fuel level and drive time.<\/p>\n\n\n\n<p><strong>Tip:<\/strong> Use Top Tier fuel, avoid long idles, and hold a steady load. After the drive, clear the code and complete a full OBD-II drive cycle. If the code stays gone, the treatment likely worked.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How long does a catalytic converter cleaner take to work?<\/h2>\n\n\n\n<p>Most brands target one drive on the same tank, roughly 15&ndash;30 minutes of steady cruising. If the ECU took several trips to set the code, it may take several trips to reset the monitor. Give it a few normal drives after the initial run.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How often should you use a catalytic converter cleaner?<\/h2>\n\n\n\n<p>There&rsquo;s no fixed schedule for this. If your car sees mostly short trips, you can do this as a preventive measure. Many fuel-system cleaners suggest intervals around every 3,000&ndash;5,000 miles (often with oil changes). That cadence also keeps injectors and intake valves cleaner, which protects the catalyst. Check your product&rsquo;s guidance.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">DIY tests before you pull the converter<\/h2>\n\n\n\n<p>Two quick checks can guide your next step:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Backpressure test<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Thread a gauge into a pre-cat O&#8322; bung<\/li>\n\n\n\n<li>Measure at idle and around 2,500 rpm. Readings above ~1&ndash;1.25 psi at idle or ~3 psi at 2,500 rpm point to a restriction (some platforms tolerate slightly more). High pressure usually means a collapsed or melted substrate, not soot.<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">Temperatures in vs. out<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>With an IR thermometer or thermocouples, a functioning converter typically shows higher outlet temps once lit.<\/li>\n\n\n\n<li>If the inlet stays hotter or both stay low despite a hot drive, catalyst chemistry may be inactive or an upstream fault is present.<\/li>\n\n\n\n<li>Use this with O&#8322; data; don&rsquo;t rely on a single number.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Can I remove my catalytic converter for cleaning?<\/h2>\n\n\n\n<p>Removing the converter to soak, spray, or pressure-wash can sometimes dislodge loose soot, but it&rsquo;s risky. Excess water or high pressure can crack the honeycomb, and harsh chemicals can destroy the catalyst. If you try a rinse, use only low-pressure water, and let the cat dry completely before reinstalling. Again: anything that alters or damages the substrate can be considered tampering, so be mindful of that.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Fix the Root Cause<\/h2>\n\n\n\n<p>A cleaned converter won&rsquo;t last if the engine keeps feeding it raw fuel, oil, or coolant. Address misfires, correct rich\/lean issues, fix exhaust leaks, and confirm stable closed-loop operation. Mechanics who fix a <a href=\"https:\/\/www.carparts.com\/blog\/p0420-code-catalyst-system-efficiency-below-threshold-bank-1-2-2\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"P0420\">P0420<\/a> issue often start there because upstream faults are so often the real problem.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">When is cleaning not enough and replacement necessary?<\/h2>\n\n\n\n<p>Because additives are inexpensive, it&rsquo;s reasonable to try a bottle and a hot highway run when your tests suggest mild fouling. But if backpressure is high, O&#8322; signals show little to no conversion, or you hear rattling, it&rsquo;s best to put your money toward a replacement part. Remember to use EPA\/CARB-compliant parts; mismatched &ldquo;universal&rdquo; units can trigger repeat efficiency codes.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"686\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2025\/10\/how-to-monitor-upstream-downstream-oxygen-sensor-1024x686.jpg\" alt=\"how to monitor upstream downstream oxygen sensor\" class=\"wp-image-184809\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2025\/10\/how-to-monitor-upstream-downstream-oxygen-sensor-1024x686.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2025\/10\/how-to-monitor-upstream-downstream-oxygen-sensor-300x201.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2025\/10\/how-to-monitor-upstream-downstream-oxygen-sensor-768x515.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2025\/10\/how-to-monitor-upstream-downstream-oxygen-sensor-1536x1029.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2025\/10\/how-to-monitor-upstream-downstream-oxygen-sensor-150x101.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2025\/10\/how-to-monitor-upstream-downstream-oxygen-sensor.jpg 1600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">You can monitor the upstream and downstream sensors on each light-off cat (the ones closest to the engine) to measure catalyst efficiency, if the upstream O2 sensor is active and the downstream sensor is lazy (see diagram). | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">What is the best catalytic converter cleaner? (Davico vs. Cataclean)<\/h2>\n\n\n\n<p>&ldquo;Best&rdquo; depends on what you&rsquo;re targeting. Some products focus on the fuel side to clean injectors and intake paths, which improves combustion and reduces soot loading. Others pitch a single pour-in step for both fuel and exhaust paths.<\/p>\n\n\n\n<p>Here, we&rsquo;ll look at two popular brands: Davico and Cataclean.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">DAVICO SledgeHammer (Run-Rite\/Davico)<\/h3>\n\n\n\n<p>This two-step kit combines a fuel-system treatment with a rapid induction deposit aerosol. It aims to clear injector, intake-valve, and induction deposits so combustion returns to normal chemistry, which lowers hydrocarbon loading on the cat. According to <a href=\"https:\/\/www.carparts.com\/search?q=catalytic_converter_cleaner&amp;refinements%5Bbrand%5D=Davico&amp;refinements%5Bpart%5D=Exhaust_-and-_Fuel_System_Cleaner&amp;itemperpage=20&amp;currentpage=1&amp;sort=best-match\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"DAVICO\">DAVICO<\/a>, their aerosol is low-VOC, quick to use, and safe for O&#8322; sensors and converters.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">CATACLEAN<\/h3>\n\n\n\n<p><a href=\"https:\/\/www.carparts.com\/search?q=catalytic_converter_cleaner&amp;refinements%5Bbrand%5D=Cataclean&amp;itemperpage=20&amp;currentpage=1&amp;sort=best-match\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Cataclean\">Cataclean<\/a> is a pour-in cleaner for gasoline and diesel. Add it at roughly a quarter tank, then drive 15&ndash;20 minutes before refueling. It contains common solvents (acetone, xylene, isopropanol, light petroleum distillates), consistent with strong detergent action.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Which to choose?<\/h3>\n\n\n\n<p>If data and backpressure tests indicate the substrate is intact and your problem stems from dirty combustion (rich trims, carbon buildup), a product that cleans injectors and the intake, like DAVICO, reduces the load that fouls the cat. If you want a quick solution for light fouling, Cataclean is simple to use. In both cases, follow the label, get the exhaust fully hot, and verify with pre-\/post-cat O&#8322; comparisons over a few drive cycles.<\/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\"> 6<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>Catalytic converters usually suffer weeks or months of rich mixtures, misfires, coolant or oil contamination before they stop working properly&#8230;. <a href=\"https:\/\/www.carparts.com\/blog\/can-a-catalytic-converter-be-cleaned-what-works-what-doesnt-and-when-to-replace-quickref\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":1651,"featured_media":184808,"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":[1034,52,3750],"tags":[1189],"ppma_author":[2607,2985],"class_list":{"0":"post-184807","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-auto-repair","8":"category-diy","9":"category-exhaust-system","10":"tag-catalytic-converter-2","11":"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>Can a Catalytic Converter Be Cleaned? What Works, What Doesn\u2019t, and When to Replace - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Can a catalytic converter be cleaned? Learn what works for mild fouling, how to use cleaners safely, DIY checks to confirm results, and when replacement is necessary.\" \/>\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\/can-a-catalytic-converter-be-cleaned-what-works-what-doesnt-and-when-to-replace-quickref\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Can a Catalytic Converter Be Cleaned? What Works, What Doesn\u2019t, and When to Replace - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Can a catalytic converter be cleaned? Learn what works for mild fouling, how to use cleaners safely, DIY checks to confirm results, and when replacement is necessary.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/can-a-catalytic-converter-be-cleaned-what-works-what-doesnt-and-when-to-replace-quickref\/\" \/>\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:author\" content=\"https:\/\/www.facebook.com\/carpartscom\" \/>\n<meta property=\"article:published_time\" content=\"2025-10-21T06:06:39+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-10-21T06:06:41+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2025\/10\/catalytic-converter-honeycomb-catalyst-substrate.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1600\" \/>\n\t<meta property=\"og:image:height\" content=\"1046\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"CarParts.com Research Team, Richard McCuistian, ASE Certified Master Automobile Technician\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@https:\/\/twitter.com\/CarPartscom\" \/>\n<meta name=\"twitter:site\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"CarParts.com Research Team\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/can-a-catalytic-converter-be-cleaned-what-works-what-doesnt-and-when-to-replace-quickref\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/can-a-catalytic-converter-be-cleaned-what-works-what-doesnt-and-when-to-replace-quickref\\\/\"},\"author\":[{\"@type\":\"Person\",\"$id\":\"1651\",\"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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