{"id":70842,"date":"2022-08-09T23:58:41","date_gmt":"2022-08-10T06:58:41","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=70842"},"modified":"2024-02-02T08:05:05","modified_gmt":"2024-02-02T16:05:05","slug":"c0045-code-left-rear-wheel-speed-circuit-malfunction","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/c0045-code-left-rear-wheel-speed-circuit-malfunction\/","title":{"rendered":"C0045 Code: Left Rear Wheel Speed 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\"> 3<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column_21ccb5-3b > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_21ccb5-3b > .kt-inside-inner-col,.kadence-column_21ccb5-3b > .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_21ccb5-3b > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_21ccb5-3b > .kt-inside-inner-col{flex-direction:column;}.kadence-column_21ccb5-3b > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_21ccb5-3b > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_21ccb5-3b{position:relative;}@media all and (max-width: 1024px){.kadence-column_21ccb5-3b > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_21ccb5-3b > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_21ccb5-3b qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-73fd9a  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-8b2e0d\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_238bdf-1d, .wp-block-kadence-advancedheading.kt-adv-heading_238bdf-1d[data-kb-block=\"kb-adv-heading_238bdf-1d\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_238bdf-1d mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_238bdf-1d[data-kb-block=\"kb-adv-heading_238bdf-1d\"] 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_238bdf-1d img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_238bdf-1d[data-kb-block=\"kb-adv-heading_238bdf-1d\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_238bdf-1d summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_238bdf-1d\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>A faulty wheel speed sensor, wiring issues, a shorted or open harness, and anti-lock braking system (ABS) module problems are most likely to trigger a C0045 code.<\/li><li>If left unaddressed, your vehicle&rsquo;s left rear wheel could slip and eventually lock up.<\/li><li>If your vehicle&rsquo;s computer logs this code, it might exhibit symptoms like an illuminated ABS warning light, activated stability and traction control lights, and a disabled ABS.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>The wheel speed sensor is a variable reluctance device usually mounted to the <a href=\"https:\/\/www.carparts.com\/steering-knuckle\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"steering knuckle\">steering knuckle<\/a>, <a href=\"https:\/\/www.carparts.com\/wheel-hub\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"wheel hub\">wheel hub<\/a>, <a href=\"https:\/\/www.carparts.com\/brake-backing-plate\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"brake backing plate\">brake backing plate<\/a>, transmission tailshaft, or differential housing. It monitors the wheel speed and sends input to the anti-lock control module whenever one wheel starts to slow down at a faster rate than the others. This means that the affected wheel is starting to slip and is at risk of locking up.<\/p>\n\n\n\n<p>A faulty wheel speed sensor, particularly the one mounted to the left rear wheel, won&rsquo;t be able to send signals to the control module and can trigger the C0045 code.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the C0045 Code Mean?<\/h2>\n\n\n\n<p><a href=\"https:\/\/www.carparts.com\/blog\/search-obd2-codes-list\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Diagnostic trouble code\">Diagnostic trouble code<\/a> (DTC) C0045 stands for &ldquo;Left Rear Wheel Speed Circuit Malfunction.&rdquo;<\/p>\n\n\n\n<p>Wheel speed sensors are typically made up of a magnetic pickup and toothed sensor ring or tone ring.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/car-wheel-speed-sensors-1024x602.jpg\" alt=\"car wheel speed sensors\" class=\"wp-image-70846\" width=\"1024\" height=\"602\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/car-wheel-speed-sensors-1024x602.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/car-wheel-speed-sensors-300x176.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/car-wheel-speed-sensors-768x452.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/car-wheel-speed-sensors-1536x904.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/car-wheel-speed-sensors-150x88.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/car-wheel-speed-sensors.jpg 1700w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>A faulty wheel speed sensor, particularly the one mounted to the left rear wheel, won&rsquo;t be able to send signals to the control module and can trigger the C0045 code.<\/figcaption><\/figure>\n\n\n\n<p>As the wheel turns, the teeth on the sensor ring move through a magnetic field, producing an alternating current (AC) voltage in the sensor windings. The number of voltage pulses per second induced in the pickup changes frequency, which means that the frequency of the signal is directly proportional to the wheel speed. As the frequency gets higher, the wheel moves faster.<\/p>\n\n\n\n<p>The anti-lock control module counts the pulses from the wheel speed sensor, monitoring the frequency signal and comparing its input with the rest of the sensors. If the control module detects an abrupt change in frequency signal, it will apply the anti-lock braking function to keep the vehicle stabilized.<\/p>\n\n\n\n<p><strong><em>Note:<\/em><\/strong><em> The definition of code C0045 might differ 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 C0045 Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>Faulty wheel speed sensor<\/li><li>Wiring issues<\/li><li>Shorted or open harness<\/li><li>An issue with the <a href=\"https:\/\/www.carparts.com\/abs-control-module\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"anti-lock brake (ABS) module\">anti-lock brake (ABS) module<\/a><\/li><\/ul>\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 Common Symptoms of the C0045 Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>Illuminated <a href=\"https:\/\/www.carparts.com\/blog\/what-is-abs-anti-lock-braking-system-a-complete-guide\/#What_Does_the_ABS_Light_on_the_Dashboard_Mean\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"anti-lock braking system (ABS) warning light\">anti-lock braking system (ABS) warning light<\/a><\/li><li>Additional dashboard warnings, such as the stability control and traction control lights<\/li><li>ABS system is inoperative<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the C0045 Code<\/h2>\n\n\n\n<p>DTC C0045 is an ABS-related code that can be logged in vehicles with on-board diagnostics (OBD). While this might be the case, keep in mind that your vehicle can exhibit symptoms that are different from other makes and models.<\/p>\n\n\n\n<p>If you&rsquo;re not familiar with the process of diagnosing trouble codes, it&rsquo;s best to take your vehicle to a certified professional to ensure that all steps are followed correctly. Otherwise, you can go ahead and do the job yourself.<\/p>\n\n\n\n<p>Before you start, you might want to check out the video below to get an idea of what the process might involve.<\/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=\"WSS or Wheel Speed Sensor Testing\" width=\"500\" height=\"375\" src=\"https:\/\/www.youtube.com\/embed\/BMM6IRUnniA?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 C0045 Code<\/h2>\n\n\n\n<p>Attempting to fix a C0045 code can be difficult especially if you don&rsquo;t have the right information. If you&rsquo;re not confident with your DIY skills yet, it&rsquo;s a good idea to bring your vehicle to the nearest repair shop and have it checked by a professional. But if you think you have the right tools and know-how, you can begin the repair process by checking out vehicle-specific repair guides like those from Chilton or an ALLDATA subscription for your convenience.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Get the Right Replacement ABS Control Module for Your Vehicle<\/h2>\n\n\n\n<p>A faulty ABS control module is one of the more severe causes of the C0045 code. Until you replace the malfunctioning computer, minimize other ABS issues by not driving your vehicle. Instead of waiting for the ABS control module to fail outright, order a new part from CarParts.com.<\/p>\n\n\n\n<p>Enjoy effortless shopping for ABS control modules online with <a href=\"http:\/\/carparts.com\" target=\"_blank\" rel=\"noreferrer noopener nofollow\" aria-label=\"CarParts.com\">CarParts.com<\/a>. Gone are the days of waiting at the back of a long line at the counter&ndash;now, you can order a replacement part on your mobile phone. Simply plug your vehicle&rsquo;s details into our website&rsquo;s built-in vehicle selector to find the products that fit your car or truck. Our strategically located warehouses deliver your new part to your doorstep within several business days. We exclusively source our ABS control modules from trusted manufacturers, ensuring you get a high-quality part that delivers long-lasting performance.<\/p>\n\n\n\n<p>Keep your vehicle&rsquo;s ABS running smoothly by replacing any malfunctioning part, including its control module. Check out our selection of <a href=\"https:\/\/www.carparts.com\/abs-control-module\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"ABS control modules\">ABS control modules<\/a> and other brake parts 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\"> 3<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>The wheel speed sensor is a variable reluctance device usually mounted to the steering knuckle, wheel hub, brake backing plate,&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/c0045-code-left-rear-wheel-speed-circuit-malfunction\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":70847,"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":[1863,3144,1601,1064,1194],"ppma_author":[2607,2855],"class_list":{"0":"post-70842","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-abs-control-module","9":"tag-brake-backing-plate","10":"tag-speed-sensor-2","11":"tag-steering-knuckle","12":"tag-wheel-hub-2","13":"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>C0045 Code: Left Rear Wheel Speed Circuit Malfunction - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Learn what a C0045 code means, its usual causes and symptoms, as well as how best to address the issue. Read on.\" \/>\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\/c0045-code-left-rear-wheel-speed-circuit-malfunction\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C0045 Code: Left Rear Wheel Speed Circuit Malfunction - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Learn what a C0045 code means, its usual causes and symptoms, as well as how best to address the issue. 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