{"id":15823,"date":"2021-12-01T00:11:00","date_gmt":"2021-12-01T08:11:00","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=15823"},"modified":"2024-06-05T02:15:08","modified_gmt":"2024-06-05T09:15:08","slug":"p0021-code-a-camshaft-position-timing-over-advanced-bank-2","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p0021-code-a-camshaft-position-timing-over-advanced-bank-2\/","title":{"rendered":"P0021 Code: \u201cA\u201d Camshaft Position &#8211; Timing Over-Advanced (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\"> 4<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column_31d6cb-42 > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_31d6cb-42 > .kt-inside-inner-col,.kadence-column_31d6cb-42 > .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_31d6cb-42 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_31d6cb-42 > .kt-inside-inner-col{flex-direction:column;}.kadence-column_31d6cb-42 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_31d6cb-42 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_31d6cb-42{position:relative;}@media all and (max-width: 1024px){.kadence-column_31d6cb-42 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_31d6cb-42 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_31d6cb-42 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-d58fe5  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-0c3b8e\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_630ffc-95, .wp-block-kadence-advancedheading.kt-adv-heading_630ffc-95[data-kb-block=\"kb-adv-heading_630ffc-95\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_630ffc-95 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_630ffc-95[data-kb-block=\"kb-adv-heading_630ffc-95\"] 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_630ffc-95 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_630ffc-95[data-kb-block=\"kb-adv-heading_630ffc-95\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_630ffc-95 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_630ffc-95\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>Diagnostic trouble code (DTC) P0021 is defined as &ldquo;&lsquo;A&rsquo; Camshaft Position &ndash; Timing Over-Advanced (Bank 2).&rdquo;&nbsp;<\/li><li>The P0021 code is triggered when the position of the intake camshaft in bank 2 is more advanced than what the powertrain control module (PCM) expects.<\/li><li>The P0021 code can be caused by a faulty variable valve timing chain actuator, a bad timing chain, a failed chain tensioner or guide, low engine oil, or a stuck timing valve control solenoid.<\/li><li>Symptoms of the P0021 code can include hard starting, rough idling, stalling, poor fuel economy, and a rattling noise from the engine.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Code P0021 is a generic powertrain code, so it is supported by various makes and models. It typically involves your vehicle&rsquo;s variable valve timing (VVT) system.&nbsp;<\/p>\n\n\n\n<p>In this article, you will learn more about what variable valve timing is and its relation to trouble code P0021. You will also learn the common symptoms and the triggers related to the P0021 code.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P0021 Code Mean?<\/h2>\n\n\n\n<p>Diagnostic trouble code (DTC) P0021 stands for &ldquo;&lsquo;A&rsquo; Camshaft Position &ndash; Timing Over-Advanced (Bank 2).&rdquo; It is triggered when the position of the <a href=\"https:\/\/www.carparts.com\/camshaft\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"intake camshaft\">intake camshaft<\/a> in bank 2 is more advanced than what the powertrain control module (PCM) has set it to be.&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"772\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/closeup-of-car-engine-showing-intake-camshaft-and-exhaust-camshaft-1024x772.jpeg\" alt=\"closeup of car engine showing intake camshaft and exhaust camshaft\" class=\"wp-image-15829\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/closeup-of-car-engine-showing-intake-camshaft-and-exhaust-camshaft-1024x772.jpeg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/closeup-of-car-engine-showing-intake-camshaft-and-exhaust-camshaft-300x226.jpeg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/closeup-of-car-engine-showing-intake-camshaft-and-exhaust-camshaft-768x579.jpeg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/closeup-of-car-engine-showing-intake-camshaft-and-exhaust-camshaft-1536x1159.jpeg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/closeup-of-car-engine-showing-intake-camshaft-and-exhaust-camshaft-150x113.jpeg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/closeup-of-car-engine-showing-intake-camshaft-and-exhaust-camshaft.jpeg 1591w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>  Diagnostic trouble code P0021 is triggered when the position of the intake camshaft in bank 2 is more advanced than what the powertrain control module has set it to be.&nbsp; <\/figcaption><\/figure>\n\n\n\n<p>Usually, the &ldquo;A&rdquo; camshaft refers to the intake camshaft. However, take note that this is not always the case. What the &ldquo;A&rdquo; camshaft signifies may vary depending on your vehicle&rsquo;s year, make, and model.<\/p>\n\n\n\n<p><em><strong>Note:<\/strong> The definition of code P0021 may be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.<\/em><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">More on Variable Valve Timing<\/h3>\n\n\n\n<p>The internal combustion engine has evolved throughout the years. One of its advancements is the incorporation of the VVT in a modern car engine. This component allows your vehicle to get more power and\/or efficiency under various driving conditions.&nbsp;<\/p>\n\n\n\n<p>The PCM uses data from the <a href=\"https:\/\/www.carparts.com\/camshaft-position-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"camshaft position sensor(s)\">camshaft position sensor(s)<\/a> and <a href=\"https:\/\/www.carparts.com\/crankshaft-position-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"crankshaft position sensor\">crankshaft position sensor<\/a> to determine the position of the shafts. Using that information, the PCM commands a VVT solenoid to apply oil pressure to an actuator on the end of the camshaft. As a result, the actuator alters the position of the camshaft, thereby changing the engine&rsquo;s valve timing.<\/p>\n\n\n\n<p>You can find more technical information in our in-depth discussion about the <a href=\"https:\/\/www.carparts.com\/blog\/p0012-code-intake-a-camshaft-position-timing-over-retarded-bank-1\/#An_In-Depth_Look_at_Camshaft_Angle_and_VVT\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"camshaft angle and VVT\">camshaft angle and VVT<\/a>.<\/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<h2 class=\"wp-block-heading\">What are the Possible Causes of the P0021 Code?&nbsp;<\/h2>\n\n\n\n<p>Below are the possible triggers of the P0021 code. Note that not all vehicles come equipped with VVT and that causes may vary depending on your vehicle&rsquo;s year, make, and model.&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Faulty valve variable timing actuator<\/li><li>Worn or damaged <a href=\"https:\/\/www.carparts.com\/timing-chain\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"timing chain\">timing chain<\/a><\/li><li>A failed <a href=\"https:\/\/www.carparts.com\/blog\/symptoms-of-a-bad-timing-chain-tensioner-plus-faq\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"timing chain tensioner\">timing chain tensioner<\/a> or <a href=\"https:\/\/www.carparts.com\/timing-chain-guide\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"guide\">guide<\/a><\/li><li>Low engine oil<\/li><li>Stuck or defective timing valve control solenoid<\/li><li>An issue with the PCM, such as software in need of an update<\/li><\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"767\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/closeup-of-automotive-timing-chain-1024x767.jpeg\" alt=\"closeup of automotive timing chain\" class=\"wp-image-15828\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/closeup-of-automotive-timing-chain-1024x767.jpeg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/closeup-of-automotive-timing-chain-300x225.jpeg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/closeup-of-automotive-timing-chain-768x575.jpeg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/closeup-of-automotive-timing-chain-928x696.jpeg 928w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/closeup-of-automotive-timing-chain-150x112.jpeg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/closeup-of-automotive-timing-chain.jpeg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption> A worn or damaged timing chain is a common cause of the P0021 code.<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">On a 2003 Nissan Altima<\/h3>\n\n\n\n<p>As mentioned, possible causes may vary depending on the vehicle. For example, these are the possible causes of P0021 listed for a 2003 <a href=\"https:\/\/www.carparts.com\/blog\/nissan-altima-reliability-and-common-problems\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Nissan Altima\">Nissan Altima<\/a>:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Harness or connectors<\/li><li>Intake valve timing control solenoid valve circuit is open or shorted.<\/li><li>Intake valve timing control solenoid valve<\/li><li>Crankshaft position sensor&nbsp;<\/li><li>Camshaft position sensor&nbsp;<\/li><li>Accumulation of ferrous metal debris to the signal pick-up portion of the camshaft<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Common Symptoms of the P0021 Code?<\/h2>\n\n\n\n<p>Aside from an <a href=\"https:\/\/www.carparts.com\/blog\/check-engine-light-flashing\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"illuminated check engine light\">illuminated check engine light<\/a>, here are some common symptoms related to the code:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Hard starting<\/li><li>Poor or rough idling&nbsp;<\/li><li>Rough running&nbsp;<\/li><li>Stalling<\/li><li>Poor fuel economy<\/li><li>Rattling noise from the engine&nbsp;<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P0021 Code&nbsp;<\/h2>\n\n\n\n<p>It may be difficult to diagnose the P0021 code, given that the symptoms associated with it may also be a sign of other faulty <a href=\"https:\/\/www.carparts.com\/blog\/car-engine-parts\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"components of an engine\">components of an engine<\/a>.&nbsp;<\/p>\n\n\n\n<p>It is also important to note that diagnostic and repair steps for <a href=\"https:\/\/www.carparts.com\/blog\/search-obd2-codes-list\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"OBD-II\">OBD-II<\/a> codes may vary depending on the vehicle&rsquo;s specific year, make, and model. For example, diagnostic procedures for a P0021 in <a href=\"https:\/\/www.carparts.com\/nissan\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Nissan\">Nissan<\/a> may differ from the process for a P0021 in <a href=\"https:\/\/www.carparts.com\/subaru\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Subaru\">Subaru<\/a>. To be sure, it is best to have your vehicle checked by professionals.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Fix the P0021 Code&nbsp;<\/h2>\n\n\n\n<p>Most people leave the repair job to their mechanic, usually because they lack the skills, knowledge, and experience essential for the task. However, that doesn&rsquo;t mean that you can&rsquo;t fix the issue yourself.&nbsp;<\/p>\n\n\n\n<p>Just make sure you have the necessary equipment on hand and adequate DIY automotive skills. Rely on <a href=\"https:\/\/www.carparts.com\/blog\/why-you-should-always-consult-a-repair-manual\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"online auto repair resources and guides\">online auto repair resources and guides<\/a> or get an ALLDATA single-vehicle subscription to get helpful information.<\/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\/crankshaft-position-sensor\" target=\"_blank\" aria-label=\"Crankshaft Position 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\/repi311803_1\">\n<strong>Crankshaft Position Sensor<\/strong>\n<\/a>\n\n<a href=\"https:\/\/www.carparts.com\/camshaft-position-sensor\" target=\"_blank\" aria-label=\"Camshaft Position 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\/repi311602_1\">\n<strong>Camshaft Position Sensor<\/strong>\n<\/a>\n\n<a href=\"https:\/\/www.carparts.com\/timing-chain\" target=\"_blank\" aria-label=\"timing chain\" 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\/rc32100006_1\">\n<strong>Timing Chain<\/strong>\n<\/a>\n\n<a href=\"https:\/\/www.carparts.com\/timing-chain-tensioner\" target=\"_blank\" aria-label=\"timing chain tensioner\" 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\/repc319401_1\">\n<strong>Timing Chain Tensioner<\/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\"> 4<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>Code P0021 is a generic powertrain code, so it is supported by various makes and models. It typically involves your&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p0021-code-a-camshaft-position-timing-over-advanced-bank-2\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":15827,"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":[411,3354],"ppma_author":[2607,2985],"class_list":{"0":"post-15823","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-camshaft","9":"tag-car-engine-all-articles","10":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P0021 Code: \u201cA\u201d Camshaft Position - Timing Over-Advanced (Bank 2) - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Learn what the P0021 code is, its common symptoms, triggers, and the correct approach to diagnosis and repair with the help of this guide. 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