{"id":12634,"date":"2021-06-07T03:00:00","date_gmt":"2021-06-07T10:00:00","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=12634"},"modified":"2024-05-27T18:38:13","modified_gmt":"2024-05-28T01:38:13","slug":"p2002-code-diesel-particulate-filter-efficiency-below-threshold-bank-1","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p2002-code-diesel-particulate-filter-efficiency-below-threshold-bank-1\/","title":{"rendered":"P2002 Code: Diesel Particulate Filter Efficiency Below Threshold (Bank 1)"},"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><style>.kadence-column_c9e482-ee > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_c9e482-ee > .kt-inside-inner-col,.kadence-column_c9e482-ee > .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-column_c9e482-ee > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_c9e482-ee > .kt-inside-inner-col{flex-direction:column;}.kadence-column_c9e482-ee > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_c9e482-ee > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_c9e482-ee{position:relative;}@media all and (max-width: 1024px){.kadence-column_c9e482-ee > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_c9e482-ee > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_c9e482-ee qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-f9f80b  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-423bd3\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_b06646-40, .wp-block-kadence-advancedheading.kt-adv-heading_b06646-40[data-kb-block=\"kb-adv-heading_b06646-40\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_b06646-40 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_b06646-40[data-kb-block=\"kb-adv-heading_b06646-40\"] 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-heading_b06646-40 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_b06646-40[data-kb-block=\"kb-adv-heading_b06646-40\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_b06646-40 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_b06646-40\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>The diagnostic trouble code (DTC) P2002 stands for &ldquo;Diesel Particulate Filter Efficiency Below Threshold (Bank 1).&rdquo;<\/li><li>This code triggers when the computer detects that the diesel particulate filter (DPF) isn&rsquo;t working.<\/li><li>The P2002 code is usually set because of issues like DPF failure, a leak in the exhaust system, and a faulty exhaust back pressure sensor.<\/li><li>The symptoms of a P2002 code can range from an illuminated check engine light and reduced fuel efficiency to the engine entering limp mode.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Diesel engines have a lot of advantages aside from providing better torque. The catch is, they produce more soot, which is a black, carbon-based substance that is damaging to the atmosphere and to human health.<\/p>\n\n\n\n<p>The <a href=\"https:\/\/www.carparts.com\/diesel-particulate-filter\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"diesel particulate filter (DPF)\">diesel particulate filter (DPF)<\/a> is a device that&rsquo;s designed to eliminate soot emitted by diesel engines. It looks a lot like a <a href=\"https:\/\/www.carparts.com\/catalytic-converter\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"catalytic converter\">catalytic converter<\/a>, but the difference between them is that the DPF can regenerate or clean itself. <\/p>\n\n\n\n<p>The process is usually automatic, but the P2002 error code will pop up when the DPF cannot perform efficiently.  <\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/07\/exhaust-pipe-of-a-vehicle-1024x683.jpeg\" alt=\"exhaust pipe of a vehicle\" class=\"wp-image-12651\" width=\"1024\" height=\"683\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/07\/exhaust-pipe-of-a-vehicle-1024x683.jpeg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/07\/exhaust-pipe-of-a-vehicle-300x200.jpeg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/07\/exhaust-pipe-of-a-vehicle-768x512.jpeg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/07\/exhaust-pipe-of-a-vehicle-600x400.jpeg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/07\/exhaust-pipe-of-a-vehicle.jpeg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>Code P2002 may appear if the diesel particulate filter (DPF) cannot perform efficiently.<\/figcaption><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading\">What Does the P2002 Code Mean?<\/h2>\n\n\n\n<p>Diagnostic trouble code (DTC) P2002 stands for &ldquo;Diesel Particulate Filter Efficiency Below Threshold (Bank 1).&rdquo; As mentioned, the DPF can clean itself in a process called regeneration. This makes P2002 a soft code. When this code appears, it indicates that there is a problem in real-time and it goes away once the fault corrects itself.<\/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<h3 class=\"wp-block-heading\">What is a Diesel Particulate Filter?<\/h3>\n\n\n\n<p>The diesel particulate filter is an emissions control device positioned in the <a href=\"https:\/\/www.carparts.com\/exhaust-system\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"exhaust system\">exhaust system<\/a> of a vehicle. Inside the DPF is a ceramic honeycomb structure coated with compounds that help trap and eliminate soot.<\/p>\n\n\n<style>.kadence-column_e024a4-50 > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_e024a4-50 > .kt-inside-inner-col,.kadence-column_e024a4-50 > .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-column_e024a4-50 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_e024a4-50 > .kt-inside-inner-col{flex-direction:column;}.kadence-column_e024a4-50 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_e024a4-50 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_e024a4-50{position:relative;}@media all and (max-width: 1024px){.kadence-column_e024a4-50 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_e024a4-50 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_e024a4-50 kb-section-dir-vertical kb-section-sm-dir-vertical pro-tip-widget\"><div class=\"kt-inside-inner-col\"><style>#kt-layout-id_8e3c4a-72 > .kt-row-column-wrap{align-content:start;}:where(#kt-layout-id_8e3c4a-72 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}#kt-layout-id_8e3c4a-72 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-none, 0rem );row-gap:var(--global-kb-gap-md, 2rem);padding-top:var( --global-kb-row-default-top, 25px );padding-bottom:var( --global-kb-row-default-bottom, 25px );padding-top:20px;padding-bottom:20px;padding-left:16px;padding-right:32px;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)));}#kt-layout-id_8e3c4a-72 > .kt-row-layout-overlay{opacity:0.00;}#kt-layout-id_8e3c4a-72 .kt-row-layout-bottom-sep{height:100px;}#kt-layout-id_8e3c4a-72 .kt-row-layout-bottom-sep svg{width:100%;}#kt-layout-id_8e3c4a-72 .kt-row-layout-bottom-sep svg{fill:#ffffff!important;}#kt-layout-id_8e3c4a-72 .kt-row-layout-top-sep{height:100px;}#kt-layout-id_8e3c4a-72 .kt-row-layout-top-sep svg{width:100%;}#kt-layout-id_8e3c4a-72 .kt-row-layout-top-sep svg{fill:#ffffff!important;}@media all and (max-width: 1024px){#kt-layout-id_8e3c4a-72 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr) minmax(0, 2fr);}}@media all and (max-width: 1024px){#kt-layout-id_8e3c4a-72 .kt-row-layout-bottom-sep{height:px;}}@media all and (max-width: 1024px){#kt-layout-id_8e3c4a-72 .kt-row-layout-bottom-sep svg{width:%;}}@media all and (max-width: 767px){#kt-layout-id_8e3c4a-72 > .kt-row-column-wrap{padding-top:28px;padding-bottom:25px;padding-left:16px;padding-right:16px;grid-template-columns:minmax(0, 1fr) minmax(0, 2fr);}#kt-layout-id_8e3c4a-72 .kt-row-layout-bottom-sep{height:px;}#kt-layout-id_8e3c4a-72 .kt-row-layout-bottom-sep svg{width:%;}}<\/style>\n<div class=\"wp-block-kadence-rowlayout alignnone pro-tip-wrap\"><div id=\"kt-layout-id_8e3c4a-72\" class=\"kt-row-layout-inner kt-layout-id_8e3c4a-72\"><div class=\"kt-row-column-wrap kt-has-2-columns kt-gutter-none kt-v-gutter-default kt-row-valign-top kt-row-layout-right-golden kt-tab-layout-right-golden kt-m-colapse-left-to-right kt-mobile-layout-right-golden  kt-custom-first-width-10  kt-custom-second-width-90\"><style>.kadence-column_a77b72-77 > .kt-inside-inner-col{display:flex;}.kadence-column_a77b72-77 > .kt-inside-inner-col{min-height:45px;border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_a77b72-77 > .kt-inside-inner-col,.kadence-column_a77b72-77 > .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-column_a77b72-77 > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}.kadence-column_a77b72-77 > .kt-inside-inner-col > *, .kadence-column_a77b72-77 > .kt-inside-inner-col > figure.wp-block-image, .kadence-column_a77b72-77 > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column_a77b72-77 > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}.kadence-column_a77b72-77 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_a77b72-77{position:relative;}@media all and (max-width: 1024px){.kadence-column_a77b72-77 > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}}@media all and (min-width: 768px) and (max-width: 1024px){.kadence-column_a77b72-77 > .kt-inside-inner-col > *, .kadence-column_a77b72-77 > .kt-inside-inner-col > figure.wp-block-image, .kadence-column_a77b72-77 > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column_a77b72-77 > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}@media all and (max-width: 767px){.kadence-column_a77b72-77 > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;justify-content:flex-start;}.kadence-column_a77b72-77 > .kt-inside-inner-col > *, .kadence-column_a77b72-77 > .kt-inside-inner-col > figure.wp-block-image, .kadence-column_a77b72-77 > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column_a77b72-77 > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_a77b72-77 kb-section-dir-horizontal kb-section-md-dir-horizontal pro-tip-item1\"><div class=\"kt-inside-inner-col\"><style>.kb-image_703294-95.kb-image-is-ratio-size, .kb-image_703294-95 .kb-image-is-ratio-size{max-width:45px;width:100%;}.wp-block-kadence-column > .kt-inside-inner-col > .kb-image_703294-95.kb-image-is-ratio-size, .wp-block-kadence-column > .kt-inside-inner-col > .kb-image_703294-95 .kb-image-is-ratio-size{align-self:unset;}.kb-image_703294-95 figure{max-width:45px;}.kb-image_703294-95 .image-is-svg, .kb-image_703294-95 .image-is-svg img{width:100%;}.kb-image_703294-95 .kb-image-has-overlay:after{opacity:0.3;}<\/style>\n<div class=\"wp-block-kadence-image kb-image_703294-95\"><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-column_05c209-77 > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_05c209-77 > .kt-inside-inner-col,.kadence-column_05c209-77 > .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-column_05c209-77 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_05c209-77 > .kt-inside-inner-col{flex-direction:column;}.kadence-column_05c209-77 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_05c209-77 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_05c209-77{position:relative;}@media all and (max-width: 1024px){.kadence-column_05c209-77 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_05c209-77 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-2 kadence-column_05c209-77 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>\n            During the DPF regeneration process, the filter must reach 600&deg;C (1112&deg;F), so the DPF is often mounted right behind the turbocharger, but it can be mounted in the exhaust system behind the catalytic converter.\n        <\/p>\n    <\/div>\n<\/div>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-data443-irp-shortcode irp-shortcode\"><div style=\"clear:both; margin-top:0em; margin-bottom:1em;\"><a href=\"https:\/\/www.carparts.com\/blog\/p20bd-code-reductant-heater-b-control-circuit-open\/\" target=\"_self\" rel=\"dofollow\" class=\"ua43c7989f268a7906e5b868a5515b673\"><style> .ua43c7989f268a7906e5b868a5515b673 { padding:0px; margin: 0; padding-top:1em!important; padding-bottom:1em!important; width:100%; display: block; font-weight:bold; background-color:#eaeaea; border:0!important; border-left:4px solid #34495E!important; text-decoration:none; } .ua43c7989f268a7906e5b868a5515b673:active, .ua43c7989f268a7906e5b868a5515b673:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; text-decoration:none; } .ua43c7989f268a7906e5b868a5515b673 { transition: background-color 250ms; webkit-transition: background-color 250ms; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; } .ua43c7989f268a7906e5b868a5515b673 .ctaText { font-weight:bold; color:#464646; text-decoration:none; font-size: 16px; } .ua43c7989f268a7906e5b868a5515b673 .postTitle { color:#000000; text-decoration: underline!important; font-size: 16px; } .ua43c7989f268a7906e5b868a5515b673:hover .postTitle { text-decoration: underline!important; } <\/style><div style=\"padding-left:1em; padding-right:1em;\"><span class=\"ctaText\">See also<\/span>&nbsp; <span class=\"postTitle\">P20BD Code: Reductant Heater &ldquo;B&rdquo; Control Circuit\/Open<\/span><\/div><\/a><\/div><\/div>\n\n\n\n<p>The DPF accumulates a slight back pressure when operated. The feedback sensors on or near the DPF help the vehicle&rsquo;s computer monitor its functionality. If there are irregularities in the pressure limits for two running cycles, the P2002 code appears. After successful regeneration, the P2002 will clear.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Diesel Particulate Filter Regeneration<\/h3>\n\n\n\n<p>DPF regeneration usually happens automatically. To be able to regenerate, the component needs to reach extreme temperatures. This is achieved when the vehicle is operated at speeds above around 40 mph (the exact speed may vary depending on the vehicle).<\/p>\n\n\n\n<p>If these conditions aren&rsquo;t met, the DPF will not regenerate as required and soot can build up inside it. In extreme cases, the DPF can become so clogged that it cannot regenerate and must be replaced. This typically happens in cases where there are so many short trips that the DPF doesn&rsquo;t have sufficient time to regenerate. <strong>A flashing DPF light typically calls for a &ldquo;service regeneration&rdquo; procedure to be performed by a technician using a scan tool<\/strong>.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>In extreme cases, the DPF (Diesel Particulate Filter Regeneration) can become so clogged that it cannot regenerate and must be replaced. This typically happens in cases where there are so many short trips that the DPF doesn&rsquo;t have sufficient time to regenerate. A flashing DPF light typically calls for a &ldquo;service regeneration&rdquo; procedure to be performed by a technician using a scan tool.<\/p><cite>&ndash;<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 P2002 code is the same as the code P2003. The difference is, P2002 refers to bank 1 or the side of the engine that contains cylinder number 1. P2003, on the other hand, is in bank 2.<\/p>\n\n\n\n<div class=\"wp-block-data443-irp-shortcode irp-shortcode\"><div style=\"clear:both; margin-top:0em; margin-bottom:1em;\"><a href=\"https:\/\/www.carparts.com\/blog\/p2459-code-diesel-particulate-filter-regeneration-frequency\/\" target=\"_self\" rel=\"dofollow\" class=\"u3a7d8a7b56448782ec4fd15fa618b1d4\"><style> .u3a7d8a7b56448782ec4fd15fa618b1d4 { padding:0px; margin: 0; padding-top:1em!important; padding-bottom:1em!important; width:100%; display: block; font-weight:bold; background-color:#eaeaea; border:0!important; border-left:4px solid #34495E!important; text-decoration:none; } .u3a7d8a7b56448782ec4fd15fa618b1d4:active, .u3a7d8a7b56448782ec4fd15fa618b1d4:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; text-decoration:none; } .u3a7d8a7b56448782ec4fd15fa618b1d4 { transition: background-color 250ms; webkit-transition: background-color 250ms; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; } .u3a7d8a7b56448782ec4fd15fa618b1d4 .ctaText { font-weight:bold; color:#464646; text-decoration:none; font-size: 16px; } .u3a7d8a7b56448782ec4fd15fa618b1d4 .postTitle { color:#000000; text-decoration: underline!important; font-size: 16px; } .u3a7d8a7b56448782ec4fd15fa618b1d4:hover .postTitle { text-decoration: underline!important; } <\/style><div style=\"padding-left:1em; padding-right:1em;\"><span class=\"ctaText\">See also<\/span>&nbsp; <span class=\"postTitle\">P2459 Code: Diesel Particulate Filter Regeneration Frequency<\/span><\/div><\/a><\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Possible Causes of the P2002 Code?<\/h2>\n\n\n\n<p>Below are some of the issues that can trigger the P2002 code:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>DPF failure\/damage<\/li><li>Exhaust leak<\/li><li>Excessive slow-speed or stop-and-go operation of the vehicle<\/li><li>Defective exhaust back pressure sensor<\/li><\/ul>\n\n\n\n<p>Constant short-distance trips and stop-and-go traffic limit the speed and temperature at which the DPF can regenerate. As a result, the latter gets clogged and fails to function properly. <\/p>\n\n\n\n<p>Fuels with high sulfur content can also cause the DPF to clog up. In some cases, the problem lies with the car&rsquo;s software, although this is rare. <\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/07\/leak-from-a-car-1024x683.jpeg\" alt=\"exhaust leak\" class=\"wp-image-12654\" width=\"1024\" height=\"683\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/07\/leak-from-a-car-1024x683.jpeg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/07\/leak-from-a-car-300x200.jpeg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/07\/leak-from-a-car-768x512.jpeg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/07\/leak-from-a-car-600x400.jpeg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/07\/leak-from-a-car.jpeg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>An exhaust leak can trigger code P2002.<\/figcaption><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading\">What are the Common Symptoms of the P2002 Code?<\/h2>\n\n\n\n<p>These are some of the signs you may observe when you get a P2002 code:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><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><\/li><li>Reduced fuel economy<\/li><li>Difficulty in starting the vehicle <\/li><li><a href=\"https:\/\/www.carparts.com\/blog\/my-car-wont-accelerate-properly-when-i-push-the-gas-causes\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Poor acceleration\">Poor acceleration<\/a><\/li><li>Engine oil is diluted<\/li><li>The engine goes into limp home (de-rated) mode <\/li><\/ul>\n\n\n\n<p>If the DPF fails to regenerate, the engine management system will attempt to increase the temperature of the exhaust so it can burn off the soot building up inside the DPF. As a result, the engine works harder and burns more fuel in the process. This increased engine activity may also cause the service life of the engine oil to shorten.<\/p>\n\n\n\n<p>If the required speed and temperature to regenerate is not met and the DPF fails to regenerate, the engine will go into limp home (de-rated) mode until the situation is corrected. This will greatly reduce the performance of the engine and transmission, making it difficult to start and accelerate.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P2002 Code<\/h2>\n\n\n\n<p>Many problems can set the P2002 code, making it tricky to pinpoint its exact cause. Unless you are confident with your automotive know-how, diagnosing the DTC is a task best left to your mechanic.<\/p>\n\n\n\n<p>The troubleshooting process can vary based on the vehicle&rsquo;s make and model. If you drive a Ford vehicle, for instance, you can start your diagnosis by checking for black soot deposits in the tailpipe. Determine if the exhaust system tailpipe emits black smoke and check for leaks.<\/p>\n\n\n\n<div class=\"wp-block-data443-irp-shortcode irp-shortcode\"><div style=\"clear:both; margin-top:0em; margin-bottom:1em;\"><a href=\"https:\/\/www.carparts.com\/blog\/p2471-code-exhaust-gas-temperature-sensor-circuit-high-bank-1-sensor-4\/\" target=\"_self\" rel=\"dofollow\" class=\"u9260bebb45f011a6109b1e99b0f4e922\"><style> .u9260bebb45f011a6109b1e99b0f4e922 { padding:0px; margin: 0; padding-top:1em!important; padding-bottom:1em!important; width:100%; display: block; font-weight:bold; background-color:#eaeaea; border:0!important; border-left:4px solid #34495E!important; text-decoration:none; } .u9260bebb45f011a6109b1e99b0f4e922:active, .u9260bebb45f011a6109b1e99b0f4e922:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; text-decoration:none; } .u9260bebb45f011a6109b1e99b0f4e922 { transition: background-color 250ms; webkit-transition: background-color 250ms; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; } .u9260bebb45f011a6109b1e99b0f4e922 .ctaText { font-weight:bold; color:#464646; text-decoration:none; font-size: 16px; } .u9260bebb45f011a6109b1e99b0f4e922 .postTitle { color:#000000; text-decoration: underline!important; font-size: 16px; } .u9260bebb45f011a6109b1e99b0f4e922:hover .postTitle { text-decoration: underline!important; } <\/style><div style=\"padding-left:1em; padding-right:1em;\"><span class=\"ctaText\">See also<\/span>&nbsp; <span class=\"postTitle\">P2471 Code: Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 4<\/span><\/div><\/a><\/div><\/div>\n\n\n\n<p>If you installed a new DPF recently, make sure the DPF parameter reset procedure was performed. You must also check for performance modifications and aftermarket exhaust accessories that diminish the exhaust restriction.<\/p>\n\n\n\n<p>Take note that these are diagnostic instructions for certain <a href=\"https:\/\/www.carparts.com\/ford\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Ford\">Ford<\/a> vehicles. To ensure you are following the right troubleshooting process, research troubleshooting guides that are specific to your car.<\/p>\n\n\n\n<p>Don&rsquo;t forget to <a href=\"https:\/\/www.carparts.com\/blog\/why-you-should-always-consult-a-repair-manual\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"check your owner&rsquo;s manual\">check your owner&rsquo;s manual<\/a> before attempting a diagnosis.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Fix the P2002 Code<\/h2>\n\n\n\n<p>Many <a href=\"https:\/\/www.carparts.com\/blog\/search-obd2-codes-list\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"OBD-II\">OBD-II<\/a> DTCs share causes and symptoms, but that doesn&rsquo;t mean that they can be resolved the same way&mdash;how they are fixed varies based on their exact cause.<\/p>\n\n\n\n<p>Take note that you will need to find a fix that worked on a vehicle that&rsquo;s the same as yours. For instance, the repair process for a P2002 code in a 2008 Ford F-250 Super Duty FX4 may involve cleaning\/replacing the air cleaner element, replacing the DPF, or performing DPF regeneration.<\/p>\n\n\n\n<p>When attempting DIY auto repair as a beginner, it&rsquo;s best to consult <a href=\"https:\/\/www.carparts.com\/blog\/best-online-resources-to-help-you-learn-how-to-fix-cars\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"online auto repair resources and guides\">online auto repair resources and guides<\/a> to ensure that you have all the right information. For more comprehensive factory repair data, you can invest in an ALLDATA single-vehicle subscription. It will help you address not only the P2002 code but also any other automotive problems that you may encounter in the future.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">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\/diesel-particulate-filter\" target=\"_blank\" aria-label=\"Diesel Particulate Filter\" 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\/rf96120001_1\">\n<strong>Diesel Particulate Filter<\/strong>\n<\/a>\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\/tail-pipe\" target=\"_blank\" aria-label=\"Tail Pipe\" 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\/rt96310001_1\">\n<strong>Tail Pipe<\/strong>\n<\/a>\n\n<!-- end of editable content -->\n\n<\/div>\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>Diesel engines have a lot of advantages aside from providing better torque. The catch is, they produce more soot, which&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p2002-code-diesel-particulate-filter-efficiency-below-threshold-bank-1\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":12652,"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":[2118],"ppma_author":[2607,2985],"class_list":{"0":"post-12634","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-diesel-particulate-filter","9":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P2002 Code: Diesel Particulate Filter Efficiency Below Threshold (Bank 1) - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Find out the symptoms and common causes of Code P2002, and how it is related to diesel particulate filter performance. Read on to learn more.\" \/>\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\/p2002-code-diesel-particulate-filter-efficiency-below-threshold-bank-1\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P2002 Code: Diesel Particulate Filter Efficiency Below Threshold (Bank 1) - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Find out the symptoms and common causes of Code P2002, and how it is related to diesel particulate filter performance. Read on to learn more.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/p2002-code-diesel-particulate-filter-efficiency-below-threshold-bank-1\/\" \/>\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:published_time\" content=\"2021-06-07T10:00:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-05-28T01:38:13+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/07\/car-exhaust-system.jpeg\" \/>\n\t<meta property=\"og:image:width\" content=\"1500\" \/>\n\t<meta property=\"og:image:height\" content=\"1000\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:site\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"\" \/>\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\\\/p2002-code-diesel-particulate-filter-efficiency-below-threshold-bank-1\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p2002-code-diesel-particulate-filter-efficiency-below-threshold-bank-1\\\/\"},\"author\":[{\"@type\":\"Person\",\"$id\":\"4\",\"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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Richard has worked for nearly 50 years in the automotive field as a professional technician, an instructor, a freelance automotive writer for Motor Age, ACtion magazine, Power Stroke Registry, and others (published every year since May 2000). He has developed training courses and written or edited training material for companies in the U.S. Canada, and the Netherlands, and even Bulgaria. He maintained an \u201cask a mechanic\u201d website for 10 years answering questions emailed to him from all over the world.\r\n\r\nRichard has an instructional automotive YouTube channel \u201cMcCuistian\u201d with 13,500 subscribers and over 1,300 videos. Much of his professional work requires photography and videography in shop environments, but Richard also enjoys taking pictures of landscapes, skyscapes, old barns and houses, small towns. He has produced a coffee table book of digital watercolors called \u201cMemories of South Alabama\u201d created from his personal photos, along with a dozen Christian fiction short original novels and a collection of short stories, all available in Kindle or softcover format. Richard has written a 2,500-word Bible study every week for the past 20 years and uses it to teach a small group at his church every Sunday morning.\r\n\r\n<strong>Credentials:<\/strong>\r\n\r\n<ul class=\"author-list\">\r\n<li><p>ASE Certified for more than 30 years in 10 categories, including L1 Advanced Engine Performance and Light Vehicle Diesel.<\/p><\/li>\r\n<li><p>Professional Mechanic\/Technician for 25 years with experience on diesel and gasoline engines, vehicles and equipment (including hydraulics).<\/p><\/li>\r\n<li><p>Spent 5 years in fleet maintenance, 20 years in independent shops and dealerships (VW, Mazda, Renault, Jeep, Ford, Lincoln), specializing in driveability and electronics for the last 14 years of his career at the same dealership.<\/p><\/li>\r\n<li><p>Senior Contributing Editor at Motor Age Magazine, first published in Motor Age in May of 2000 and every year since. He has won two International Automotive Media Awards for technical articles published in trade magazines.<\/p><\/li>\r\n<li><p>Has attended hundreds of hours of automotive training from OEMs including GM, Volkswagen, Mazda, Renault, Jeep, Chrysler, as well as additional training at events like KC Vision and MACS (Mobile Air Climate Systems Association).<\/p><\/li>\r\n<li><p>Taught college level auto mechanics for 19 years.<\/p><\/li>\r\n<li><p>Has written for automotive training companies (including course development work for training companies in Canada and the Netherlands) and has been hired to teach professional trade show technician courses at multiple training events in Texas and Alabama.<\/p><\/li>\r\n<li><p>While still teaching at the college level, Richard launched a new automotive program in Geneva, Alabama, setting up a dual enrollment department in a new building, organizing the shop and classroom, teaching morning classes to high school students for 2 years while still teaching at the college in the afternoon.<\/p><\/li>\r\n<li><p>Richard\u2019s college program at Lurleen B. Wallace Community College worked at professional shop speed during his tenure to prepare graduates for production level work in the real world.<\/p><\/li>\r\n<\/ul>"}],"_links":{"self":[{"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/posts\/12634","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/comments?post=12634"}],"version-history":[{"count":0,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/posts\/12634\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/media\/12652"}],"wp:attachment":[{"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/media?parent=12634"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/categories?post=12634"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/tags?post=12634"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/ppma_author?post=12634"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}