{"id":77043,"date":"2022-10-27T20:46:51","date_gmt":"2022-10-28T03:46:51","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=77043"},"modified":"2023-09-15T01:52:22","modified_gmt":"2023-09-15T08:52:22","slug":"p0652-code-sensor-reference-voltage-b-circuit-low","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p0652-code-sensor-reference-voltage-b-circuit-low\/","title":{"rendered":"P0652 Code: Sensor Reference Voltage \u201cB\u201d Circuit Low"},"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_12dedf-bc > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_12dedf-bc > .kt-inside-inner-col,.kadence-column_12dedf-bc > .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_12dedf-bc > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_12dedf-bc > .kt-inside-inner-col{flex-direction:column;}.kadence-column_12dedf-bc > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_12dedf-bc > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_12dedf-bc{position:relative;}@media all and (max-width: 1024px){.kadence-column_12dedf-bc > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_12dedf-bc > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_12dedf-bc qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-802106  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-02e804\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_797024-18, .wp-block-kadence-advancedheading.kt-adv-heading_797024-18[data-kb-block=\"kb-adv-heading_797024-18\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_797024-18 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_797024-18[data-kb-block=\"kb-adv-heading_797024-18\"] 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_797024-18 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_797024-18[data-kb-block=\"kb-adv-heading_797024-18\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_797024-18 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_797024-18\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>If diagnostic trouble code P0652 appears on your scan tool, it means that there&rsquo;s a problem with the reference voltage circuit &ldquo;B.&rdquo; Several sensors are connected to this voltage circuit, which means they can malfunction if the issue isn&rsquo;t resolved.<\/li><li>A faulty sensor, wiring issues, and a problem with the powertrain control module (PCM) can cause on-board diagnostics to log a P0652 code.<\/li><li>Other than an illuminated check engine light, your vehicle could exhibit signs of drivability problems if this code is present.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>The engine relies on inputs from many <a href=\"https:\/\/www.carparts.com\/blog\/8-of-the-most-important-car-sensors-you-should-know-about\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"sensors\">sensors<\/a> to ensure its efficient operation. These sensors send a voltage signal to the <a href=\"https:\/\/www.carparts.com\/engine-control-module\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"powertrain control module\">powertrain control module<\/a> (PCM), which allows the computer to monitor and operate various systems. The PCM also supplies a reference voltage to the sensors. If the PCM detects an issue with one of the sensor reference voltage circuits, which, in this case refers to a circuit designated as &ldquo;B,&rdquo; on-board diagnostics will log a P0652 code.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P0652 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> P0652 stands for &ldquo;Sensor Reference Voltage &ldquo;B&rdquo; Circuit.&rdquo;<\/p>\n\n\n\n<p>Sensors are responsible for monitoring key functions like ignition timing, fuel delivery, charging output, transmission shifting, and emission controls, among others.<\/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\/10\/multiple-car-sensors-in-white-background-1024x602.jpg\" alt=\"multiple car sensors in white background\" class=\"wp-image-77044\" width=\"1024\" height=\"602\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/multiple-car-sensors-in-white-background-1024x602.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/multiple-car-sensors-in-white-background-300x176.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/multiple-car-sensors-in-white-background-768x452.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/multiple-car-sensors-in-white-background-1536x904.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/multiple-car-sensors-in-white-background-150x88.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/multiple-car-sensors-in-white-background.jpg 1700w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>Sensors are responsible for monitoring key functions like ignition timing, fuel delivery, charging output, transmission shifting, and emission controls, among others.<\/figcaption><\/figure>\n\n\n\n<p>If one or more sensors are defective, the vehicle can experience problems like being unable to go into closed loop (coolant or <a href=\"https:\/\/www.carparts.com\/oxygen-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"oxygen sensor\">oxygen sensor<\/a>), receiving incorrect fuel mixture (<a href=\"https:\/\/www.carparts.com\/throttle-position-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"throttle position sensor\">throttle position sensor<\/a>, <a href=\"https:\/\/www.carparts.com\/map-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"manifold absolute pressure sensor\">manifold absolute pressure sensor<\/a>, or <a href=\"https:\/\/www.carparts.com\/mass-air-flow-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"airflow sensor\">airflow sensor<\/a>), and more.<\/p>\n\n\n\n<p>A typical, three-wire sensor has a reference wire, a signal wire, and a ground wire. The PCM supplies the sensor with a 5-volt reference voltage. Then, the sensor alters that voltage according to operating conditions and sends a corresponding signal back to the PCM.<\/p>\n\n\n\n<p>Usually, several sensors share the same 5-volt reference voltage circuit. If the PCM detects a problem with the reference voltage circuit designated &ldquo;B&rdquo;, it will set code P0652.<\/p>\n\n\n\n<p><strong><em>Note:<\/em><\/strong><em> The definition of code P0652 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 P0652 Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>Faulty engine sensor or another component on the &ldquo;B&rdquo; reference voltage circuit<\/li><li>Wiring issues<\/li><li><a href=\"https:\/\/www.carparts.com\/blog\/car-pcm-meaning-symptoms-of-failure-and-more\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Powertrain control module failure\">Powertrain control module failure<\/a> or software in need of an update<\/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 P0652 Code?<\/h2>\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=\"Illuminated check engine light\">Illuminated check engine light<\/a><\/li><li>One or more sensors don&rsquo;t operate properly, potentially leading to a variety of driveability problems<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P0652 Code<\/h2>\n\n\n\n<p>DTC P0652 is a generic powertrain code that can be logged in vehicles with an OBD-II system. However, keep in mind that the steps for diagnosis and repair can vary, depending on vehicle specifications.<\/p>\n\n\n\n<p>Diagnosing a trouble code such as this one might require you to use a scan tool or inspect the engine for signs of damage, which can be tricky for someone who&rsquo;s not well-versed in automotive repair. Under this circumstance, it&rsquo;s best to have a certified mechanic work on your vehicle instead.<\/p>\n\n\n\n<p>But if you think you have the skills to do the job on your own, here&rsquo;s a video you might want to check out before proceeding.<\/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=\"Vw tdi P0652 sensor reference voltage\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/G8poc9jg4bk?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 P0652 Code<\/h2>\n\n\n\n<p>Without the right tools and automotive expertise, attempting to fix a P0652 code can be frustrating and confusing. It can even lead to more damage if done incorrectly. To ensure that all steps and protocols are followed correctly, it&rsquo;s best to have a trained professional perform the necessary repairs.<\/p>\n\n\n\n<p>But if you think your DIY skills are enough to get the job done on your own, make sure to have the right equipment before you start. Keep in mind that there&rsquo;s no umbrella fix that will resolve all trouble codes for every make and model, so having the right manual is crucial in ensuring a successful repair job. Before you begin, you might want to check out guides like those from Chilton or an ALLDATA subscription to get vehicle-specific repair information.<\/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 engine relies on inputs from many sensors to ensure its efficient operation. These sensors send a voltage signal to&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p0652-code-sensor-reference-voltage-b-circuit-low\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":77045,"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":[1323,1355,1462,1190,1679],"ppma_author":[2607,2855],"class_list":{"0":"post-77043","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-engine-control-module-2","9":"tag-map-sensor-2","10":"tag-mass-air-flow-sensor-2","11":"tag-oxygen-sensor-2","12":"tag-throttle-position-sensor","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>P0652 Code: Sensor Reference Voltage \u201cB\u201d Circuit Low - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Here\u2019s the meaning behind a P0652 trouble code as well as the most common causes that could trigger 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\/p0652-code-sensor-reference-voltage-b-circuit-low\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0652 Code: Sensor Reference Voltage \u201cB\u201d Circuit Low - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Here\u2019s the meaning behind a P0652 trouble code as well as the most common causes that could trigger it.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/p0652-code-sensor-reference-voltage-b-circuit-low\/\" \/>\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=\"2022-10-28T03:46:51+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-09-15T08:52:22+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/mechanic-checks-engine-area-hood-open.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2000\" \/>\n\t<meta property=\"og:image:height\" content=\"1333\" \/>\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=\"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\\\/p0652-code-sensor-reference-voltage-b-circuit-low\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0652-code-sensor-reference-voltage-b-circuit-low\\\/\"},\"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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