{"id":7724,"date":"2021-10-29T02:22:00","date_gmt":"2021-10-29T09:22:00","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=7724"},"modified":"2026-02-06T18:58:04","modified_gmt":"2026-02-07T02:58:04","slug":"p0430-code-catalyst-system-efficiency-below-threshold-bank-2","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p0430-code-catalyst-system-efficiency-below-threshold-bank-2\/","title":{"rendered":"P0430 Code: Catalyst System Efficiency Below Threshold  (Bank 2)"},"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\"> 8<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column7724_e518c3-84 > .kt-inside-inner-col,.kadence-column7724_e518c3-84 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column7724_e518c3-84 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column7724_e518c3-84 > .kt-inside-inner-col{flex-direction:column;}.kadence-column7724_e518c3-84 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column7724_e518c3-84 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column7724_e518c3-84{position:relative;}@media all and (max-width: 1024px){.kadence-column7724_e518c3-84 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column7724_e518c3-84 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column7724_e518c3-84 inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-f5d6f7  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-29e528\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading7724_33f945-6a, .wp-block-kadence-advancedheading.kt-adv-heading7724_33f945-6a[data-kb-block=\"kb-adv-heading7724_33f945-6a\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading7724_33f945-6a mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading7724_33f945-6a[data-kb-block=\"kb-adv-heading7724_33f945-6a\"] mark.kt-highlight{font-family:Inter;font-weight:500;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading7724_33f945-6a img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading7724_33f945-6a[data-kb-block=\"kb-adv-heading7724_33f945-6a\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading7724_33f945-6a summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading7724_33f945-6a\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The P0430 code stands for &ldquo;Catalyst System Efficiency Below Threshold (Bank 2).&rdquo;<\/li>\n\n\n\n<li>This trouble code is triggered when the computer detects a problem with the catalytic converter mounted near engine bank 2.<\/li>\n\n\n\n<li>A faulty catalytic converter, damaged O2 sensor, wiring issues, and exhaust leaks are the most common reasons why the on-board computer can log a P0430.<\/li>\n\n\n\n<li>If the computer logs a P0430 code, your vehicle can exhibit symptoms like an illuminated check engine light and a failed emissions test.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Your vehicle starts <a href=\"https:\/\/www.carparts.com\/blog\/smoke-from-exhaust-meaning\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"belching smoke\">belching smoke<\/a>. Its engine might stall, lose power, and idle roughly. Finally, the <a href=\"https:\/\/www.carparts.com\/blog\/check-engine-light-flashing\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"check engine light\">check engine light<\/a> switches on. When you plug the <a href=\"https:\/\/www.carparts.com\/blog\/search-obd2-codes-list\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"OBD-II\">OBD-II<\/a> (on-board diagnostics 2) scanner into the connector, it shows the trouble code P0430.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"What_Does_the_P0430_Code_Mean?\">What Does the P0430 Code Mean?<\/h2>\n\n\n\n<p>P0430 is a diagnostic trouble code (DTC) for &ldquo;Catalyst System Efficiency Below Threshold (Bank 2).&rdquo; It warns about a problem with the catalytic converter mounted near engine bank 2 (the side of the engine opposite the number one cylinder).<\/p>\n\n\n\n<div id=\"article-search-widget\">\n<div class=\"cp-search\">\n<div align=\"center\">\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/w_auto,dpr_auto\/carparts\/logos\/badge_wordmark\/full_color\/CP_LOGO_COLOUR_RGB\" alt=\"CarParts.com\" width=\"300\" height=\"56\">\n<\/div>\n<form id=\"cpsearchform\" name=\"cpsearchform\" action=\"https:\/\/www.carparts.com\/search\" method=\"get\" target=\"_blank\" accept-charset=\"character_set\" aria-label=\"search CarParts.com\">\n    <input type=\"text\" class=\"keyword\" name=\"q\" placeholder=\"Search for parts on CarParts.com\" value=\"\" aria-label=\"Search CarParts.com\"><input type=\"submit\" class=\"btn-search\" value=\"Search\" aria-label=\"Search\">\n<\/form>\n<\/div>\n<\/div>\n\n\n\n<p>A <a href=\"https:\/\/www.carparts.com\/blog\/bad-catalytic-converter-symptoms\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"failing catalytic converter\">failing catalytic converter<\/a> breaks down less pollutants in the exhaust, resulting in lower oxygen (O2) levels overall. The downstream oxygen sensor detects the change and informs the vehicle&rsquo;s computer. In turn, the computer activates the check engine light and logs the appropriate OBD-II trouble code for diagnosis by a trained mechanic.<\/p>\n\n\n\n<p>In most cases, a vehicle with an inefficient catalytic converter will continue to run just fine. But if the converter is obstructed internally, it can cause poor engine performance and may even damage the engine in the long run.<\/p>\n\n\n\n<p>Both scenarios can result in higher levels of pollution that may violate state and federal limits on vehicle emissions, although many states do not require emissions testing.<\/p>\n\n\n<style>.kadence-column7724_0718bb-5b > .kt-inside-inner-col,.kadence-column7724_0718bb-5b > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column7724_0718bb-5b > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column7724_0718bb-5b > .kt-inside-inner-col{flex-direction:column;}.kadence-column7724_0718bb-5b > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column7724_0718bb-5b > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column7724_0718bb-5b{position:relative;}@media all and (max-width: 1024px){.kadence-column7724_0718bb-5b > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column7724_0718bb-5b > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column7724_0718bb-5b kb-section-dir-vertical kb-section-sm-dir-vertical inner-column-1 pro-tip-widget\"><div class=\"kt-inside-inner-col\"><style>.kb-row-layout-id7724_d90552-c9 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id7724_d90552-c9 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id7724_d90552-c9 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-none, 0rem );row-gap:var(--global-kb-gap-md, 2rem);padding-top:20px;padding-right:32px;padding-bottom:20px;padding-left:16px;grid-template-columns:minmax(0, calc(10% - ((var(--global-kb-gap-none, 0rem ) * 1 )\/2)))minmax(0, calc(90% - ((var(--global-kb-gap-none, 0rem ) * 1 )\/2)));}.kb-row-layout-id7724_d90552-c9 > .kt-row-layout-overlay{opacity:0.00;}.kb-row-layout-id7724_d90552-c9 .kt-row-layout-bottom-sep{height:100px;}.kb-row-layout-id7724_d90552-c9 .kt-row-layout-bottom-sep svg{width:100%;}.kb-row-layout-id7724_d90552-c9 .kt-row-layout-bottom-sep svg{fill:#ffffff!important;}.kb-row-layout-id7724_d90552-c9 .kt-row-layout-top-sep{height:100px;}.kb-row-layout-id7724_d90552-c9 .kt-row-layout-top-sep svg{width:100%;}.kb-row-layout-id7724_d90552-c9 .kt-row-layout-top-sep svg{fill:#ffffff!important;}@media all and (max-width: 1024px){.kb-row-layout-id7724_d90552-c9 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr) minmax(0, 2fr);}}@media all and (max-width: 1024px){.kb-row-layout-id7724_d90552-c9 .kt-row-layout-bottom-sep{height:px;}}@media all and (max-width: 1024px){.kb-row-layout-id7724_d90552-c9 .kt-row-layout-bottom-sep svg{width:%;}}@media all and (max-width: 767px){.kb-row-layout-id7724_d90552-c9 > .kt-row-column-wrap{padding-top:28px;padding-right:16px;padding-bottom:25px;padding-left:16px;grid-template-columns:minmax(0, 1fr) minmax(0, 2fr);}.kb-row-layout-id7724_d90552-c9 .kt-row-layout-bottom-sep{height:px;}.kb-row-layout-id7724_d90552-c9 .kt-row-layout-bottom-sep svg{width:%;}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id7724_d90552-c9 alignnone pro-tip-wrap wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-2-columns kt-row-layout-right-golden kt-tab-layout-right-golden kt-mobile-layout-right-golden kt-row-valign-top\">\n<style>.kadence-column7724_c00150-0e > .kt-inside-inner-col{display:flex;}.kadence-column7724_c00150-0e > .kt-inside-inner-col{min-height:45px;}.kadence-column7724_c00150-0e > .kt-inside-inner-col,.kadence-column7724_c00150-0e > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column7724_c00150-0e > .kt-inside-inner-col{row-gap:0px;column-gap:0px;}.kadence-column7724_c00150-0e > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}.kadence-column7724_c00150-0e > .kt-inside-inner-col > *, .kadence-column7724_c00150-0e > .kt-inside-inner-col > figure.wp-block-image, .kadence-column7724_c00150-0e > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column7724_c00150-0e > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}.kadence-column7724_c00150-0e > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column7724_c00150-0e{position:relative;}@media all and (max-width: 1024px){.kadence-column7724_c00150-0e > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}}@media all and (min-width: 768px) and (max-width: 1024px){.kadence-column7724_c00150-0e > .kt-inside-inner-col > *, .kadence-column7724_c00150-0e > .kt-inside-inner-col > figure.wp-block-image, .kadence-column7724_c00150-0e > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column7724_c00150-0e > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}@media all and (max-width: 767px){.kadence-column7724_c00150-0e > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;justify-content:flex-start;}.kadence-column7724_c00150-0e > .kt-inside-inner-col > *, .kadence-column7724_c00150-0e > .kt-inside-inner-col > figure.wp-block-image, .kadence-column7724_c00150-0e > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column7724_c00150-0e > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column7724_c00150-0e kb-section-dir-horizontal kb-section-md-dir-horizontal inner-column-1 pro-tip-item1\"><div class=\"kt-inside-inner-col\"><style>.kb-image7724_3425e6-b2.kb-image-is-ratio-size, .kb-image7724_3425e6-b2 .kb-image-is-ratio-size{max-width:45px;width:100%;}.wp-block-kadence-column > .kt-inside-inner-col > .kb-image7724_3425e6-b2.kb-image-is-ratio-size, .wp-block-kadence-column > .kt-inside-inner-col > .kb-image7724_3425e6-b2 .kb-image-is-ratio-size{align-self:unset;}.kb-image7724_3425e6-b2 figure{max-width:45px;}.kb-image7724_3425e6-b2 .image-is-svg, .kb-image7724_3425e6-b2 .image-is-svg img{width:100%;}.kb-image7724_3425e6-b2 .kb-image-has-overlay:after{opacity:0.3;}<\/style>\n<div class=\"wp-block-kadence-image kb-image7724_3425e6-b2\"><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=\"\" class=\"kb-img\"><\/figure><\/div>\n<\/div><\/div>\n\n\n<style>.kadence-column7724_037a80-20 > .kt-inside-inner-col,.kadence-column7724_037a80-20 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column7724_037a80-20 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column7724_037a80-20 > .kt-inside-inner-col{flex-direction:column;}.kadence-column7724_037a80-20 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column7724_037a80-20 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column7724_037a80-20{position:relative;}@media all and (max-width: 1024px){.kadence-column7724_037a80-20 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column7724_037a80-20 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column7724_037a80-20 inner-column-2 pro-tip-item2\"><div class=\"kt-inside-inner-col\">\n<div class=\"protip-desc\">\n\t<div class=\"help-tip\">\n\t\t<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\t<\/div>\n    <div class=\"help-caption\">\n        <p>\n            <strong>Pro Tip:<\/strong>\nTypically, the check engine light (CEL) will be illuminated before exhaust clogging becomes a problem, so find out why that light is on.\n        <\/p>\n    <\/div>\n<\/div>\n<\/div><\/div>\n\n<\/div><\/div><\/div><\/div>\n\n\n\n<p>If the OBD-II code reader displays a <a href=\"https:\/\/www.carparts.com\/blog\/p0420-code-catalyst-system-efficiency-below-threshold-bank-1\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"P0420\">P0420<\/a> or P0430 trouble code, bring your vehicle to an auto repair shop for a thorough checkup and repair job.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"How_the_Catalytic_Converter_Works\">How the Catalytic Converter Works<\/h3>\n\n\n\n<p>The catalytic converter is an exhaust-mounted emissions control device. When working properly, it transforms pollutants created by the engine into harmless water vapor and carbon dioxide.<\/p>\n\n\n\n<p>The three enemy gasses the emissions system targets are:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>NOx (nitrogen oxides)<\/li>\n\n\n\n<li>HC (hydrocarbons or unburned fuel)<\/li>\n\n\n\n<li>CO (carbon monoxide, which is an invisible, odorless, and deadly poison in a closed space)<\/li>\n<\/ul>\n\n\n\n<p>A &ldquo;catalyst&rdquo; changes other things without undergoing change itself. Today&rsquo;s vehicles have what is known as a &ldquo;three-way catalyst&rdquo; that handles all three of the harmful gasses.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"850\" height=\"555\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/catalytic-converter-honeycomb.jpg\" alt=\"catalytic converter honeycomb\" class=\"wp-image-87336\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/catalytic-converter-honeycomb.jpg 850w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/catalytic-converter-honeycomb-300x196.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/catalytic-converter-honeycomb-768x501.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/07\/catalytic-converter-honeycomb-150x98.jpg 150w\" sizes=\"(max-width: 850px) 100vw, 850px\"><figcaption class=\"wp-element-caption\">The catalytic converter has a hard clay &ldquo;honeycomb&rdquo; coated throughout with very fine particles of precious metals like platinum and palladium rhodium and surrounded by a vermiculite blanket. Those precious metals are the catalyst, and the converter must get very hot (over 1,000 degrees) before they begin to work.<strong> <\/strong>Most catalysts heat up very quickly and operate at around 1,400 degrees F. That&rsquo;s why the &ldquo;light off&rdquo; catalyst is mounted so near the engine. | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<p>As for the P0430\/420 codes, it&rsquo;s important to note that these codes only point to a problem with the light-off converter that is mounted closest to the engine. The rear converter isn&rsquo;t monitored by the OBD-II system. Some converters have both &ldquo;bricks&rdquo; in one shell with the oxygen sensor screwed right into the middle of the converter between the two bricks.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>As for the P0430\/420 codes, it&rsquo;s important to note that these codes only point to a problem with the light-off converter that is mounted closest to the engine.<\/p>\n<cite><em>&ndash;<\/em><a href=\"https:\/\/www.carparts.com\/blog\/author\/richardmccuistian\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Richard McCuistian, ASE Certified Master Automobile Technician\">Richard McCuistian, ASE Certified Master Automobile Technician<\/a><\/cite><\/blockquote>\n\n\n\n<p>The light-off converter nearest the engine handles NOx emissions (a product of hot combustion), while the one farthest from the engine handles HC and CO (from too-rich mixtures). An engine with a healthy catalyst system will produce CO2 and water vapor at the exhaust.<\/p>\n\n\n\n<p>Remember, normal combustion creates water vapor, and that&rsquo;s why all that steam comes from the exhaust until the exhaust system warms up when you start a vehicle in cold weather. An engine typically produces a gallon of water for every gallon of fuel consumed. Is this a problem? Not at all. Neither is CO2. The grass loves CO2, which is one of the reasons roadsides need so much mowing. CO2 feeds plants and trees exactly what they need.<\/p>\n\n\n\n<p>But since 1996, OBD-II regulations have required the PCM (the vehicle&rsquo;s engine computer) to keep track of the catalytic converter&rsquo;s performance by monitoring the downstream oxygen sensor, which is referred to as such because it&rsquo;s located behind the catalytic converter.<\/p>\n\n\n\n<p>If you&rsquo;re advanced enough to watch live data on a scan tool or with your smartphone app talking to a dongle connected to the DLC connector on a healthy engine, you&rsquo;ll see the upstream O2 sensor the computer uses to balance the air\/fuel mixture switching rapidly (several times per second). You&rsquo;ll also see the downstream corresponding O2 sensor switching much slower.<\/p>\n\n\n\n<p>That&rsquo;s the way it&rsquo;s supposed to be. When the downstream sensor begins to switch at the same rate as the upstream sensor, the P0420\/P0430 codes are stored by the PCM to flag the failure of the catalyst to store oxygen.<\/p>\n\n\n\n    <div class=\"ai-summary-widget\">\n\n        <div class=\"ai-summary-grid\">\n\n            <div>\n                <div class=\"ai-avatar\">\n                    <figure>\n                        <img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/q_auto,dpr_auto,f_auto\/carparts\/blog\/widgets\/ai-summary\/ai-bot\" alt=\"AI robot\">\n                    <\/figure>\n                    <span>ELI5<\/span>\n                <\/div>\n            <\/div>\n            <div>\n                <p>The car&rsquo;s engine makes dirty gas when it runs. There&rsquo;s a part called the catalytic converter that helps clean the gas. It turns the bad stuff into safer things like water and a gas called carbon dioxide. It cleans three bad gases: NOx, HC, and CO. If the cleaner stops working, a warning light comes on. The car checks the gas with a special tool before and after it gets cleaned. If the gas looks wrong after cleaning, the cleaner might be broken.<\/p>    \n            <\/div>\n\n        <\/div>\n\n        <div class=\"ai-summary-tooltip\">   \n            <p>Not everyone is an auto repair expert. <strong>ELI5 (&ldquo;Explain Like I&rsquo;m Five&rdquo;)<\/strong> provides layperson-friendly explanations of complex automotive concepts, systems, &amp; parts, so you can fully understand their importance. Great for casual car owners and DIY beginners! Powered by AI.<\/p>\n        <\/div>\n\n    <\/div>\n\n\n\n<p>The catalytic converter helps reduce harmful gases from the car&rsquo;s exhaust, turning them into harmless water vapor and carbon dioxide. It targets three gases: nitrogen oxides (NOx), hydrocarbons (HC), and carbon monoxide (CO). The &ldquo;three-way catalyst&rdquo; works on all three gases, with one converter handling NOx and the other handling HC and CO.<\/p>\n\n\n\n<p>The P0430\/P0420 codes indicate issues with the light-off converter near the engine, which is responsible for NOx. The OBD-II system monitors the converter&rsquo;s performance by tracking oxygen levels with sensors before and after the converter. Healthy systems show rapid switching on the upstream sensor and slower switching on the downstream one. If the downstream sensor switches too quickly, it signals a failure in the catalytic converter, triggering the codes.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"P0430_vs_P0420\">P0430 vs. P0420<\/h3>\n\n\n\n<p>The P0430 code&rsquo;s mirror image is P0420, which applies to the converter on bank 1. As was mentioned, bank 1 and bank 2 simply refer to the different sides of the engine. It&rsquo;s also worth noting that engines with an inline or straight cylinder configuration only have one bank, although some inline six-cylinder engines will have two &ldquo;banks&rdquo; and two cats with four O2 sensors. Jeep 4.0L inline six-cylinder engines tend to be configured this way.<\/p>\n\n\n\n<p>While the OBD-II scanner can distinguish between a P0420 code and a P0430, it never hurts to double-check for issues that may cause a problem with the catalytic converter. There can be different causes for vehicles like a BMW with code P0420 and P0430.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"What_are_the_Possible_Causes_of_the_P0430_Code?\">What are the Possible Causes of the P0430 Code?<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/03\/closeup-of-an-oxygen-sensor-1-1024x683.jpeg\" alt=\"Close-up shot of a car's oxygen sensor\" class=\"wp-image-7729\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/03\/closeup-of-an-oxygen-sensor-1-1024x683.jpeg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/03\/closeup-of-an-oxygen-sensor-1-300x200.jpeg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/03\/closeup-of-an-oxygen-sensor-1-768x512.jpeg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/03\/closeup-of-an-oxygen-sensor-1-600x400.jpeg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/03\/closeup-of-an-oxygen-sensor-1.jpeg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">One possible cause of the P030 code is a damaged or failing oxygen sensor. <\/figcaption><\/figure>\n\n\n\n<p>A faulty catalytic converter is the most frequent cause of a P0430 trouble code. Common issues that can cause this OBD-II code include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Faulty catalytic converter.<\/li>\n\n\n\n<li><a href=\"https:\/\/www.carparts.com\/blog\/how-to-test-an-o2-sensor\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Damaged or failing O2 sensor\">Damaged or failing O2 sensor<\/a> that gets incorrect readings of emission levels.<\/li>\n\n\n\n<li>Broken or improperly connected wiring for the downstream O2 sensor.<\/li>\n\n\n\n<li>Upstream and downstream O2 sensors reporting very similar O2 level readings. It&rsquo;s important to note that if the upstream O2 sensor becomes unreliable and the PCM detects it, the downstream O2 sensor becomes the primary fuel feedback signal. Many mechanics don&rsquo;t know this, but the PCM&rsquo;s programming is all about keeping the catalytic converter happy. That&rsquo;s how important the converter is.<\/li>\n\n\n\n<li>An upstream <a href=\"https:\/\/www.carparts.com\/blog\/exhaust-system-parts-101-the-basics-diagram-included\/#Leaks\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"leak in the exhaust system\">leak in the exhaust system<\/a>, such as a <a href=\"https:\/\/www.carparts.com\/blog\/how-to-tell-if-your-exhaust-manifold-is-leaking\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"crack in the exhaust manifold\">crack in the exhaust manifold<\/a> or a loose header pipe at the manifold that allows air to enter and confuse the upstream sensor.<\/li>\n\n\n\n<li>Faulty fuel injectors.<\/li>\n\n\n\n<li>Computer issues (e.g., software in need of an update).<\/li>\n\n\n\n<li>Engine isn&rsquo;t heating up enough.<\/li>\n<\/ul>\n\n\n\n<p>There are also several problems that can cause the catalytic converter to fail in the first place. Engine performance issues, such as a misfire or improper air\/fuel ratio, can cause the converter to overheat due to raw fuel passing through the converter. This can make the converter glow cherry red in extreme circumstances.<\/p>\n\n\n\n<p>The converter can also be damaged by contaminants (e.g., coolant and engine oil).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"What_are_the_Common_Symptoms_of_the_P0430_Code?\">What are the Common Symptoms of the P0430 Code?<\/h2>\n\n\n\n<p>You may notice the following symptoms if you drive a vehicle with a P0430 trouble code:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.carparts.com\/blog\/check-engine-light-flashing\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"An illuminated or flashing check engine light\">An illuminated or flashing check engine light<\/a><\/li>\n\n\n\n<li>A failed emissions test<\/li>\n\n\n\n<li>A rotten egg or sulfur smell<\/li>\n<\/ul>\n\n\n\n<p>Often, code P0430 indicates a converter that&rsquo;s worn out or degraded, rather than obstructed internally. But if the converter is blocked or clogged, that can lead to engine performance problems, such as lack of power, rough idle, and stalling.<\/p>\n\n\n\n    <div class=\"perspective-widget\">\n        <div class=\"pt-child-wrap\">\n\n            <div class=\"pt-col-item1\">\n                <figure class=\"aligncenter size-large\">\n                        <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/dpr_auto,f_auto,q_auto\/carparts\/blog\/plugins\/amp\/avatar-comments\" class=\"com-thumb\" alt=\"Avatar of CarParts.com Research Team\" width=\"100\" height=\"100\">\n                <\/figure>\n                <p>\n                    <strong>Karthik Sai<\/strong> \n                    <span>User<\/span>\n                <\/p>\n            <\/div>\n\n            <div class=\"pt-col-item2\">\n                <div class=\"protip-desc\">\n                    <div class=\"perspective-help-tip\">   \n                        <p>There&rsquo;s more than one way to look at an issue. &ldquo;Community Perspectives&rdquo; highlight authentic personal viewpoints and real-life experiences by the CarParts.com community, including our readers, experts, and product specialists, among others. This can help you make better informed decisions about your car.<\/p>\n                    <\/div>\n                    <div class=\"perspective-help-caption tooltip\"> \n                        <h2>CarParts.com Community Perspectives<\/h2>\n                        <p>I have a 2012 Honda Pilot and had a lot of expenses since it crossed 160k miles. The expenses are more than the value of vehicle, but I still like it more than my ex. The engine light turns on and I have to replace the transmission and torque converter. Later on, the engine mounts break and need to be changed. Six months later, engine light turns on again, and the catalytic converter is the problem and needs replacement. Welcome to old age, things breaks apart frequently. Keep fixing them until you can afford to get a new car.<\/p>\n                        <div class=\"cta-btn\">\n                            <a href=\"https:\/\/www.carparts.com\/blog\/p0430-code-catalyst-system-efficiency-below-threshold-bank-2\/#commentform\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Jump to Discussions\">Jump to Discussions<\/a>\n                        <\/div>\n                    <\/div>\n                <\/div>\n            <\/div>\n\n        <\/div>\n    <\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"How_to_Diagnose_the_P0430_Code\">How to Diagnose the P0430 Code<\/h2>\n\n\n\n<p>There are numerous potential causes for the OBD-II code P0430. As such, diagnosis can be difficult. For an idea of how to troubleshoot the code, check out the video below:<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Diagnosing a catalyst efficiency code (P0420 or P0430)\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/vyVnhCIMDnw?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"How_to_Fix_the_P0430_Code\">How to Fix the P0430 Code<\/h2>\n\n\n\n<p>There are multiple reasons why code P0430 might be stored. Therefore, there isn&rsquo;t a magic bullet fix for the issue. You&rsquo;ll need to diagnose the code accurately, as outlined above, then perform any necessary repairs.<\/p>\n\n\n\n<p>The code could be triggered by parts like a bad catalytic converter, a faulty oxygen sensor, or a damaged wiring harness and connectors, so you must do your homework. If your scan tool is still showing p0420 and p0430 codes after replacing the catalytic converter, then a bad oxygen sensor might be the problem, instead of a bad catalytic converter. <\/p>\n\n\n\n<p>Also, keep in mind that all vehicles are different. When troubleshooting and repairing DTCs, you should consult the factory repair information for your application.<\/p>\n\n\n\n<p>Repair manuals, such as those from Chilton, are useful, but an ALLDATA subscription is even better. ALLDATA has single-vehicle subscriptions for DIYers that provide detailed factory repair information.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Other_Notes_About_P0430\">Other Notes About P0430<\/h2>\n\n\n\n<p>Since it is a generic powertrain code, the P0430 trouble code applies to most makes and models of vehicles manufactured from 1996 onward. The exact repair method may vary according to the type of vehicle, but in general, the fix for a P0430 on a Ford will be pretty much the same as the fix for a Chevy or Nissan. This fix might also work for a P0430 on a Lexus GS300, a P0430 on a Toyota 4Runner, or a Honda Odyssey P0430.<\/p>\n\n\n\n<p>Many car owners make the mistake of immediately attributing a P0430 trouble code to the oxygen sensors and replacing the devices without checking for other possible causes. Since the problem will usually be the catalytic converter, another part of the exhaust system, or even the engine, simply replacing the O2 sensors is a waste of time and money.<\/p>\n\n\n\n<p>Vehicle owners with extensive DIY auto repair can fix most issues that cause a P0430 trouble code. However, the safest approach is to bring the vehicle to an auto repair shop for diagnosis and repair.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Where_To_Buy_Parts_for_the_P0430_Code\">Where To Buy Parts for the P0430 Code<\/h2>\n\n\n\n<p>If you&rsquo;re looking to buy a new <a href=\"https:\/\/www.carparts.com\/catalytic-converter\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"catalytic converter\">catalytic converter<\/a>, <a href=\"https:\/\/www.carparts.com\/oxygen-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"O2 sensors\">O2 sensors<\/a>, or other parts you need to resolve the P0430 trouble code, order now from CarParts.com! With our wide selection of aftermarket brands, you&rsquo;re sure to find the part you need without breaking the bank.<\/p>\n\n\n\n<p>Placing an order with us takes only a few clicks on our easy-to-navigate website. You don&rsquo;t even need to leave the comforts of home to make your purchase. And if you aren&rsquo;t sure what parts to buy, just ask our friendly, round-the-clock customer support.<\/p>\n\n\n\n<p>We also offer a convenient and secure check-out and accept all major credit and debit cards, PayPal, and Visa Checkout for payment. Don&rsquo;t hesitate. Place your order today!<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Products_Mentioned_in_this_Guide\">Products Mentioned in this Guide<\/h2>\n\n\n\n<div class=\"reusable-productlink\">\n\n<!-- start of editable content -->\n\n<a href=\"https:\/\/www.carparts.com\/catalytic-converter\" target=\"_blank\" aria-label=\"Catalytic Converter\" rel=\"noopener\">\n<img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/d_noimage.jpg,h_200,w_200,c_pad,f_auto,q_auto,dpr_auto,e_sharpen\/images\/repi960303_1\">\n<strong>Catalytic Converter<\/strong>\n<\/a>\n\n<a href=\"https:\/\/www.carparts.com\/oxygen-sensor\" target=\"_blank\" aria-label=\"Oxygen Sensor\" rel=\"noopener\">\n<img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/d_noimage.jpg,h_200,w_200,c_pad,f_auto,q_auto,dpr_auto,e_sharpen\/images\/set-repb960901-2_1\">\n<strong>Oxygen Sensor<\/strong>\n<\/a>\n\n<a href=\"https:\/\/www.carparts.com\/exhaust-manifold\" target=\"_blank\" aria-label=\"Exhaust Manifold\" rel=\"noopener\">\n<img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/d_noimage.jpg,h_200,w_200,c_pad,f_auto,q_auto,dpr_auto,e_sharpen\/images\/repf960714_1\">\n<strong>Exhaust Manifold<\/strong>\n<\/a>\n\n<!-- end of editable content -->\n\n<\/div>\n\n\n\n<div class=\"shop-project\">\n\n    <h2>Shop this Project<\/h2>\n\n    <ul class=\"shop-project-list\">\n        \n        <li>\n            <div class=\"shop-project-item\">\n                <div class=\"stp-image-url\">\n                    <a href=\"https:\/\/www.carparts.com\/details\/catalytic-converter\/evan-fischer\/repn960344\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label='&lt;img src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/repn960344_1\" alt=\"Evan Fischer&reg; &ndash; Rear Catalytic Converter, Federal EPA Standard, 46-State Legal, 2.5L Engine\" \/&gt;'><img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/repn960344_1\" alt=\"Evan Fischer&reg; &ndash; Rear Catalytic Converter, Federal EPA Standard, 46-State Legal, 2.5L Engine\"><\/a>\n                <\/div>\n\n                <div class=\"stp-desc\">\n                                            <p class=\"stp-title\">\n                            <a href=\"https:\/\/www.carparts.com\/details\/catalytic-converter\/evan-fischer\/repn960344\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Evan Fischer&reg; &ndash; Rear Catalytic Converter, Federal EPA Standard, 46-State Legal, 2.5L Engine\">Evan Fischer&reg; &ndash; Rear Catalytic Converter, Federal EPA Standard, 46-State Legal, 2.5L Engine<\/a>\n                        <\/p>\n                    \n                    <div class=\"stp-stars\">\n                        <img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/q_auto,dpr_auto,f_auto\/carparts\/blog\/widgets\/shop-project\/stars\/star-4.5.svg\" alt=\"4.5 Stars\">\n                    <\/div>\n\n                                            <p class=\"stp-price\">$154.99<\/p>\n                    \n                    <p><small>Price and rating may change from the time content is published.<\/small><\/p>\n\n                                            <p class=\"stp-cta\">\n                            <a href=\"https:\/\/www.carparts.com\/details\/catalytic-converter\/evan-fischer\/repn960344\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Shop Now\">Shop Now<\/a>\n                        <\/p>\n                                    <\/div>\n\n            <\/div>\n        <\/li>\n\n        \n        <li>\n            <div class=\"shop-project-item\">\n                <div class=\"stp-image-url\">\n                    <a href=\"https:\/\/www.carparts.com\/details\/oxygen-sensor\/drivewire\/repn960915\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label='&lt;img src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/repn960915_1\" alt=\"DriveWire &ndash; Oxygen Sensor, 4-Wire, Heated\" \/&gt;'><img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/repn960915_1\" alt=\"DriveWire &ndash; Oxygen Sensor, 4-Wire, Heated\"><\/a>\n                <\/div>\n\n                <div class=\"stp-desc\">\n                                            <p class=\"stp-title\">\n                            <a href=\"https:\/\/www.carparts.com\/details\/oxygen-sensor\/drivewire\/repn960915\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"DriveWire &ndash; Oxygen Sensor, 4-Wire, Heated\">DriveWire &ndash; Oxygen Sensor, 4-Wire, Heated<\/a>\n                        <\/p>\n                    \n                    <div class=\"stp-stars\">\n                        <img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/q_auto,dpr_auto,f_auto\/carparts\/blog\/widgets\/shop-project\/stars\/star-4.5.svg\" alt=\"4.5 Stars\">\n                    <\/div>\n\n                                            <p class=\"stp-price\">$59.49<\/p>\n                    \n                    <p><small>Price and rating may change from the time content is published.<\/small><\/p>\n\n                                            <p class=\"stp-cta\">\n                            <a href=\"https:\/\/www.carparts.com\/details\/oxygen-sensor\/drivewire\/repn960915\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Shop Now\">Shop Now<\/a>\n                        <\/p>\n                                    <\/div>\n\n            <\/div>\n        <\/li>\n\n        \n        <li>\n            <div class=\"shop-project-item\">\n                <div class=\"stp-image-url\">\n                    <a href=\"https:\/\/www.carparts.com\/details\/exhaust-system\/brexhaust\/bo1060075\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label='&lt;img src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/bo1060075_1\" alt=\"BRExhaust&reg; &ndash; 106-0075 Direct-Fit Exhaust Series &ndash; 2003-2009 Exhaust System &ndash; Made of Aluminized Steel\" \/&gt;'><img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/bo1060075_1\" alt=\"BRExhaust&reg; &ndash; 106-0075 Direct-Fit Exhaust Series &ndash; 2003-2009 Exhaust System &ndash; Made of Aluminized Steel\"><\/a>\n                <\/div>\n\n                <div class=\"stp-desc\">\n                                            <p class=\"stp-title\">\n                            <a href=\"https:\/\/www.carparts.com\/details\/exhaust-system\/brexhaust\/bo1060075\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"BRExhaust&reg; &ndash; 106-0075 Direct-Fit Exhaust Series &ndash; 2003-2009 Exhaust System &ndash; Made of Aluminized Steel\">BRExhaust&reg; &ndash; 106-0075 Direct-Fit Exhaust Series &ndash; 2003-2009 Exhaust System &ndash; Made of Aluminized Steel<\/a>\n                        <\/p>\n                    \n                    <div class=\"stp-stars\">\n                        <img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/q_auto,dpr_auto,f_auto\/carparts\/blog\/widgets\/shop-project\/stars\/star-5.svg\" alt=\"5 Stars\">\n                    <\/div>\n\n                                            <p class=\"stp-price\">$367.00<\/p>\n                    \n                    <p><small>Price and rating may change from the time content is published.<\/small><\/p>\n\n                                            <p class=\"stp-cta\">\n                            <a href=\"https:\/\/www.carparts.com\/details\/exhaust-system\/brexhaust\/bo1060075\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Shop Now\">Shop Now<\/a>\n                        <\/p>\n                                    <\/div>\n\n            <\/div>\n        <\/li>\n\n            <\/ul>\n<\/div>\n\n\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\"> 8<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>Your vehicle starts belching smoke. Its engine might stall, lose power, and idle roughly. Finally, the check engine light switches&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p0430-code-catalyst-system-efficiency-below-threshold-bank-2\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":1651,"featured_media":7726,"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":[1314],"tags":[161],"ppma_author":[2607,2985],"class_list":{"0":"post-7724","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-catalytic-converter","9":"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>P0430 Code: Catalyst System Efficiency Below Threshold (Bank 2) - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"P0430 warns about the catalytic converter not working up to speed. Learn more about the code, its symptoms, the way to diagnose it, and ways to fix it.\" \/>\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\/p0430-code-catalyst-system-efficiency-below-threshold-bank-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0430 Code: Catalyst System Efficiency Below Threshold (Bank 2) - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"P0430 warns about the catalytic converter not working up to speed. 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