{"id":73865,"date":"2022-10-05T03:22:22","date_gmt":"2022-10-05T10:22:22","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=73865"},"modified":"2026-04-29T02:43:24","modified_gmt":"2026-04-29T09:43:24","slug":"p0385-code-crankshaft-position-sensor-b-circuit-malfunction","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p0385-code-crankshaft-position-sensor-b-circuit-malfunction\/","title":{"rendered":"P0385 Code: Crankshaft Position Sensor B Circuit Malfunction"},"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-column73865_df7a0d-62 > .kt-inside-inner-col,.kadence-column73865_df7a0d-62 > .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-column73865_df7a0d-62 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column73865_df7a0d-62 > .kt-inside-inner-col{flex-direction:column;}.kadence-column73865_df7a0d-62 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column73865_df7a0d-62 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column73865_df7a0d-62{position:relative;}@media all and (max-width: 1024px){.kadence-column73865_df7a0d-62 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column73865_df7a0d-62 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column73865_df7a0d-62 inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-d94d61  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-79d430\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading73865_a737fc-28, .wp-block-kadence-advancedheading.kt-adv-heading73865_a737fc-28[data-kb-block=\"kb-adv-heading73865_a737fc-28\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading73865_a737fc-28 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading73865_a737fc-28[data-kb-block=\"kb-adv-heading73865_a737fc-28\"] 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-heading73865_a737fc-28 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading73865_a737fc-28[data-kb-block=\"kb-adv-heading73865_a737fc-28\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading73865_a737fc-28 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading73865_a737fc-28\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Diagnostic trouble code (DTC) P0385 stands for &ldquo;Crankshaft Position Sensor B Circuit Malfunction.&rdquo;<\/li>\n\n\n\n<li>Code P0385 is logged when the powertrain control module (PCM) doesn&rsquo;t detect any signal or detects a faulty signal from the crankshaft position (CKP) sensor, which is in charge of monitoring the speed and condition of the crankshaft.<\/li>\n\n\n\n<li>Common causes of the P0385 code include a failed CKP sensor, a damaged reluctor ring, and a faulty PCM.<\/li>\n\n\n\n<li>Common symptoms of the P0385 code include an illuminated check engine light, the engine stalling or running rough, and decreased engine performance.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>The <a href=\"https:\/\/www.carparts.com\/crankshaft-position-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"crankshaft position sensor (CKP)\">crankshaft position sensor (CKP)<\/a> provides information to the powertrain control module (PCM) about the position and rotation speed of the crankshaft. If you think your vehicle&rsquo;s CKP is faulty, you should connect a scan tool to check if a code, such as the P0385 code, has been stored.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P0385 Code Mean?<\/h2>\n\n\n\n<p>Diagnostic trouble code (DTC) P0385 stands for Crankshaft Position Sensor B Circuit Malfunction. If the powertrain control module doesn&rsquo;t detect any signal or detects a faulty signal from the CKP sensor, then it will trigger the P0385 code.<\/p>\n\n\n\n<p>The CKP sensor works by scanning the grooves of a reluctor ring using magnets. This reluctor ring is attached to the crankshaft so it spins at the same rate. Every time a groove passes over the CKP sensor, the magnetic field is interrupted, which then corresponds to signals sent to the PCM. The PCM is able to translate this into information on how fast the <a href=\"https:\/\/www.carparts.com\/crankshaft\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"crankshaft\">crankshaft<\/a> is spinning as well as its position.&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"614\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/car-ckp-1-1024x614.jpg\" alt=\"image of a car crankshaft position sensor\" class=\"wp-image-73923\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/car-ckp-1-1024x614.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/car-ckp-1-300x180.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/car-ckp-1-768x461.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/car-ckp-1-150x90.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/car-ckp-1.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">If the PCM doesn&rsquo;t detect any signal or detects a faulty signal from the CKP sensor, then it will trigger the P0385 code.<\/figcaption><\/figure>\n\n\n\n<p>The PCM uses this information to determine ignition timing and sometimes other operating parameters, such as fuel injector control and variable valve timing operation. The signal from the CKP sensor is also used to monitor if there are any misfires in the cylinders.<\/p>\n\n\n\n<p><strong><em>Note:<\/em><\/strong><em> The definition of code P0385 might 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<h2 class=\"wp-block-heading\">What are the Common Causes of the P0385 Code?<\/h2>\n\n\n\n<p>The P0385 code may be caused by the following:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Failed CKP sensor<\/li>\n\n\n\n<li>Damaged reluctor ring<\/li>\n\n\n\n<li>Faulty PCM<\/li>\n\n\n\n<li>Faulty <a href=\"https:\/\/www.carparts.com\/blog\/car-wiring\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"wiring\">wiring<\/a><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Common Symptoms of the P0385 Code?<\/h2>\n\n\n\n<p>Your vehicle might experience the following symptoms if the P0385 code is stored:<\/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=\"Illuminated check engine light\">Illuminated check engine light<\/a><\/li>\n\n\n\n<li>Engine runs rough or stalls<\/li>\n\n\n\n<li>Decreased engine performance<\/li>\n\n\n\n<li>The engine refuses to start<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/examining-car-engine-1024x576.jpg\" alt=\"mechanic examining car engine\" class=\"wp-image-73921\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/examining-car-engine-1024x576.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/examining-car-engine-300x169.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/examining-car-engine-768x432.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/examining-car-engine-150x84.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/examining-car-engine.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">The diagnostic process for the P0385 code might require a visual inspection of the concerned parts, so best to have a trained mechanic do the job for you.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P0385 Code<\/h2>\n\n\n\n<p>The P0385 is a generic powertrain code that can be logged in most vehicles with an OBD-II system. While this code can be stored in most modern vehicles, remember that diagnosing this <a href=\"https:\/\/www.carparts.com\/blog\/search-obd2-codes-list\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"trouble code\">trouble code<\/a> can vary depending on vehicle specifications.<\/p>\n\n\n\n<p>The diagnostic process might require a visual inspection of the concerned parts, which can be difficult if you&rsquo;re not familiar when it comes to the internal components of your vehicle. The CKP sensor itself might need to be tested, which requires the right tools. It might be best to have a trained mechanic do the job for you. However, you can also do it yourself if you&rsquo;re confident in your DIY skills.<\/p>\n\n\n\n<p>Interested in diagnosing your problem yourself? Learn about the diagnostic process below.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-4-3 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Crank Sensor Operation\" width=\"500\" height=\"375\" src=\"https:\/\/www.youtube.com\/embed\/Exz4f4RfBFY?start=9&amp;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\">How to Fix the P0385 Code<\/h2>\n\n\n\n<p>The first thing you have to do before you start any repair process is a proper diagnosis. Accurately diagnosing the issue that&rsquo;s triggering the code is important. Otherwise, you might be fixing or replacing a part that is functioning properly.<\/p>\n\n\n\n<p>There are many ways to fix a specific OBD-II code because there are many possible causes. Once you&rsquo;ve identified the issues causing the trouble code, then you can 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=\"reliable online auto repair resources and how-to guides\">reliable online auto repair resources and how-to guides<\/a> for possible fixes.<\/p>\n\n\n\n<p>Since all vehicles are different, a fix for an OBD-II code for one vehicle may not work for another. Internal components can vary greatly among manufacturers. This is why you should consult a <a href=\"https:\/\/www.carparts.com\/blog\/why-you-should-always-consult-a-repair-manual\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"repair manual or repair database\">repair manual or repair database<\/a> when it comes to troubleshooting and repairing DTCs. Chilton repair manuals can also be useful. An ALLDATA DIY subscription might be better, as it provides detailed factory repair information for drivers who want to do the repairs themselves.<\/p>\n\n\n\n<div class=\"rsi-card\">\n  <div class=\"rsi-thumb\">\n    <img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/d_noimage.jpg\/b_white\/e_sharpen,e_auto_brightness,e_auto_contrast\/f_auto\/q_auto:eco,dpr_auto\/w_873,h_873,c_pad\/images\/reph311817_1\">\n  <\/div>\n  <div class=\"rsi-info\">\n    <span class=\"rsi-title\">The Crankshaft Position Sensor Order Sheet: How to Build the Right Cart for One Job<\/span>\n    <span class=\"rsi-desc\">Check out this practical guide to ordering the right crankshaft position sensor, including fitment splits, kit logic, and what to verify before installation.<\/span>\n    <a href=\"https:\/\/www.carparts.com\/blog\/the-crankshaft-position-sensor-order-sheet-build-the-right-cart-for-the-job-quickref\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Discover Your Options\">Discover Your Options<\/a>\n  <\/div>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">Get a Replacement Crankshaft Position Sensor Today<\/h2>\n\n\n\n<p>Once you&rsquo;ve successfully diagnosed the P0385 code, you can now take the necessary steps to replace the failed CKP sensor behind it. Ignoring the issue for too long can lead to an engine that runs rough, stalls, or refuses to start. Luckily, you can save yourself from all that trouble by getting a brand-new CKP sensor from CarParts.com today.<\/p>\n\n\n\n<p>Browse through our wide selection of high-quality CKP sensors, and enjoy a hassle-free shopping experience, thanks to our built-in vehicle selector and search filters. By entering your vehicle&rsquo;s year, make, and model, you can easily find all the available CKP sensors that are compatible with your ride. If you need any help, don&rsquo;t hesitate to reach out to our customer service team who are always happy to help you with your order 24\/7.<\/p>\n\n\n\n<p>Don&rsquo;t wait until your faulty CKP sensor interferes with your engine performance before replacing it. Check out our selection of high-quality <a href=\"https:\/\/www.carparts.com\/crankshaft-position-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"crankshaft position sensors\">crankshaft position sensors<\/a> at CarParts.com and order one for your vehicle today!<\/p>\n<\/body><\/html>\n","protected":false},"excerpt":{"rendered":"<p><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 4<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>The crankshaft position sensor (CKP) provides information to the powertrain control module (PCM) about the position and rotation speed of&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p0385-code-crankshaft-position-sensor-b-circuit-malfunction\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":1651,"featured_media":73914,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":true,"_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":[1623],"ppma_author":[2607,2855],"class_list":{"0":"post-73865","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-crankshaft-position-sensor-2","9":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P0385 Code: Crankshaft Position Sensor B Circuit Malfunction - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"A faulty CKP can trigger the code P0385. Learn about the definition, common causes, and symptoms of this code here.\" \/>\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\/p0385-code-crankshaft-position-sensor-b-circuit-malfunction\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0385 Code: Crankshaft Position Sensor B Circuit Malfunction - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"A faulty CKP can trigger the code P0385. Learn about the definition, common causes, and symptoms of this code here.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/p0385-code-crankshaft-position-sensor-b-circuit-malfunction\/\" \/>\n<meta property=\"og:site_name\" content=\"In The Garage with CarParts.com\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/carpartscom\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/carpartscom\" \/>\n<meta property=\"article:published_time\" content=\"2022-10-05T10:22:22+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-29T09:43:24+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/mechanic-checking-car-problem.jpg\" \/>\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=\"author\" content=\"CarParts.com Research Team, William Guzenski, ASE Certified Master Automobile Technician\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@https:\/\/twitter.com\/CarPartscom\" \/>\n<meta name=\"twitter:site\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"CarParts.com Research Team\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0385-code-crankshaft-position-sensor-b-circuit-malfunction\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0385-code-crankshaft-position-sensor-b-circuit-malfunction\\\/\"},\"author\":[{\"@type\":\"Person\",\"$id\":\"1651\",\"name\":\"CarParts.com Research Team\",\"jobTitle\":\"Expert Automotive Writer\",\"description\":\"The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. 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