{"id":16167,"date":"2022-04-13T00:53:00","date_gmt":"2022-04-13T07:53:00","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=16167"},"modified":"2024-08-19T20:30:27","modified_gmt":"2024-08-20T03:30:27","slug":"p0520-code-engine-oil-pressure-sensor-switch-a-circuit","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p0520-code-engine-oil-pressure-sensor-switch-a-circuit\/","title":{"rendered":"P0520 Code: Engine Oil Pressure Sensor\/Switch \u201cA\u201d Circuit"},"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-column16167_9c8a19-0a > .kt-inside-inner-col,.kadence-column16167_9c8a19-0a > .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-column16167_9c8a19-0a > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column16167_9c8a19-0a > .kt-inside-inner-col{flex-direction:column;}.kadence-column16167_9c8a19-0a > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column16167_9c8a19-0a > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column16167_9c8a19-0a{position:relative;}@media all and (max-width: 1024px){.kadence-column16167_9c8a19-0a > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column16167_9c8a19-0a > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column16167_9c8a19-0a inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-32fc46  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-425aac\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading16167_5f98bd-f2, .wp-block-kadence-advancedheading.kt-adv-heading16167_5f98bd-f2[data-kb-block=\"kb-adv-heading16167_5f98bd-f2\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading16167_5f98bd-f2 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading16167_5f98bd-f2[data-kb-block=\"kb-adv-heading16167_5f98bd-f2\"] 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-heading16167_5f98bd-f2 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading16167_5f98bd-f2[data-kb-block=\"kb-adv-heading16167_5f98bd-f2\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading16167_5f98bd-f2 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading16167_5f98bd-f2\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>DTC P0520 stands for &ldquo;Engine Oil Pressure Sensor\/Switch &ldquo;A&rdquo; Circuit.&rdquo;<\/li>\n\n\n\n<li>This is logged when the PCM detects problems with the oil pressure sensor, oil pressure switch, or the oil pressure in general.<\/li>\n\n\n\n<li>Code P0520 is usually triggered because of faulty oil pressure sensors, bad circuitry, and low oil pressure.<\/li>\n\n\n\n<li>Some of the most common symptoms associated with this code include a lit check engine light, a malfunctioning engine, and the vehicle being stuck in &ldquo;limp mode.&rdquo;<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>If your scan tool or code reader is showing the P0520 code, this guide will provide its definition, causes, and symptoms.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does Code P0520 Mean?<\/h2>\n\n\n\n<p>The P0520 engine code is set when the reading from the <a href=\"https:\/\/www.carparts.com\/oil-pressure-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"oil pressure sensor\">oil pressure sensor<\/a> differs from the manufacturer&rsquo;s specification. Oil pressure is essential to maintain the longevity of every internal combustion engine.<\/p>\n\n\n\n<p>Having the correct oil pressure ensures that there&rsquo;s a cushion of oil between the rotating internal <a href=\"https:\/\/www.carparts.com\/blog\/car-engine-parts\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"engine components\">engine components<\/a>. The car&rsquo;s computer or <a href=\"https:\/\/www.carparts.com\/engine-control-module\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"powertrain control module (PCM)\">powertrain control module (PCM)<\/a> monitors the oil pressure by sending a reference voltage to the engine oil pressure sensor. This sensor returns voltage output to the PCM, which is analyzed and compared to the ideal oil pressure programmed in it.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"941\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/engine-control-module-4-1024x941.jpeg\" alt=\"engine control module 4\" class=\"wp-image-16190\" style=\"width:1024px;height:941px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/engine-control-module-4-1024x941.jpeg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/engine-control-module-4-300x276.jpeg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/engine-control-module-4-768x706.jpeg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/engine-control-module-4-150x138.jpeg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/engine-control-module-4.jpeg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">The PCM monitors the oil pressure by sending a reference voltage to the engine oil pressure sensor.  <\/figcaption><\/figure>\n\n\n\n<p>Inside the oil pressure switch is a pressure-sensing device that&rsquo;s in direct contact with the oil flow. Oil pressure can either increase or decrease the sensor&rsquo;s resistance and the PCM is capable of converting these changes into an accurate interpretation of the actual oil pressure.<\/p>\n\n\n\n<p>In other words, the oil pressure sensor that triggers a P0520 code is typically a three-wire sensor with 5 volts, a signal return ground, and a signal voltage that varies with engine oil pressure. The sensor&rsquo;s job is to convert engine oil pressure to a voltage reading that the ECM\/PCM is programmed to interpret as an accurate indicator of engine oil pressure.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>The oil pressure sensor that triggers a P0520 code is typically a three-wire sensor with 5 volts, a signal return ground, and a signal voltage that varies with engine oil pressure.<\/p>\n<cite><em>&ndash;&nbsp;<\/em><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>A working pressure sensor will output a voltage within an upper and lower voltage limit. The lower threshold is purposely greater than 0V so that a circuit check can be performed on the device. If the PCM determines the sensor voltage is outside the ideal threshold for a period of time, the sensor&rsquo;s signal is deemed invalid and code P0520 is set.<\/p>\n\n\n\n<p>Read our note about <a href=\"https:\/\/www.carparts.com\/blog\/p0521-code-engine-oil-pressure-sensorswitch-rangeperformance\/#A_Quick_Note_on_Oil_Pressure_for_Different_OEMs\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"oil pressure for different OEMs\">oil pressure for different OEMs<\/a> before you attempt any DIY troubleshooting for code P0520.<\/p>\n\n\n\n<p><em><strong>Note: <\/strong>The definition of code P0502 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<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 P0520 Code?<\/h2>\n\n\n\n<p>Knowing the possible origin of the problem helps in troubleshooting any <a href=\"https:\/\/www.carparts.com\/blog\/search-obd2-codes-list\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"trouble code\">trouble code<\/a>. It is important to know what&rsquo;s causing the P0520 code before taking action. Make sure to take note of these probable causes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.carparts.com\/blog\/the-top-3-signs-of-a-bad-oil-pressure-sensor\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Bad engine oil pressure sensor\">Bad engine oil pressure sensor<\/a><\/li>\n\n\n\n<li>An issue with the oil pressure sensor&rsquo;s circuit <\/li>\n\n\n\n<li>An engine problem leading to <a href=\"https:\/\/www.carparts.com\/blog\/low-oil-pressure-symptoms-and-faq\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"low oil pressure\">low oil pressure<\/a><\/li>\n\n\n\n<li>An issue with the PCM, such as software in need of an update <\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Common Symptoms of Code P0520?<\/h2>\n\n\n\n<p>Be keen in observing any changes in your vehicle. There could be multiple symptoms for code P0520. Here are the common ones you need to watch for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Noises from the engine <\/li>\n\n\n\n<li>Vehicle stuck in &ldquo;<a href=\"https:\/\/www.carparts.com\/blog\/web-stories\/what-is-limp-mode\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"limp mode\">limp mode<\/a>&rdquo; <\/li>\n\n\n\n<li><a href=\"https:\/\/www.carparts.com\/blog\/my-car-wont-start-what-should-i-do\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Engine won&rsquo;t start\">Engine won&rsquo;t start<\/a><\/li>\n\n\n\n<li>Illuminated oil pressure warning light<\/li>\n\n\n\n<li><a href=\"\/\/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<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"597\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/check-engine-light-is-on-3-1024x597.jpeg\" alt=\"check engine light is on 3\" class=\"wp-image-16183\" style=\"width:1024px;height:597px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/check-engine-light-is-on-3-1024x597.jpeg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/check-engine-light-is-on-3-300x175.jpeg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/check-engine-light-is-on-3-768x448.jpeg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/check-engine-light-is-on-3-150x88.jpeg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/check-engine-light-is-on-3.jpeg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">One common symptom of error code P0520 is an illuminated check engine light.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P0520 Code<\/h2>\n\n\n\n<p>There are different ways of diagnosing the OBD code P0520 as it has several possible causes. Don&rsquo;t expect a universal diagnosis as vehicles are built differently depending on the make and model. It&rsquo;s a viable option to consult a certified mechanic to avoid inconveniences that may lead to expensive repairs.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Fix the P0520 Code <\/h2>\n\n\n\n<p>It is possible that the P0520 code in your car requires a different fix than the one you&rsquo;ve <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=\"read online\">read online<\/a>. Components in a car may be laid out differently depending on the car manufacturer and this makes it impossible for someone to come up with a universal solution. In addition, there are different designs of oil pressure switches, making a repair or replacement tricky.<\/p>\n\n\n\n<p>To help you with the diagnosis, you can get an ALLDATA single-vehicle subscription, which you can use to help clear code P0520. This subscription will not only help you clear this specific code, it can also help you clear other ones that may be set in the future.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Get a Quality Replacement Oil Pressure Sensor<\/h2>\n\n\n\n<p>A bad oil pressure sensor can trigger DTC P0520. The faulty sensor is likely also causing odd engine noises and other engine trouble. If this is the case, replace your oil pressure sensor to get your vehicle back to a safe and drivable state. For quality replacement parts or tools, order here at CarParts.com.<\/p>\n\n\n\n<p>CarParts.com offers a wide range of quality aftermarket parts. We&rsquo;re happy to sell these parts at different price points to suit various budgets, and our catalog features many trusted aftermarket brands. We&rsquo;re so confident in our products that we have a 60-day return policy. We believe your peace of mind is important when ordering parts online. So if you aren&rsquo;t satisfied with the components you&rsquo;ve ordered, we&rsquo;re happy to replace them or refund your purchase.<\/p>\n\n\n\n<p>Your vehicle&rsquo;s bad oil pressure sensor will continue to negatively affect the engine if you don&rsquo;t replace it. Purchase a new <a href=\"https:\/\/www.carparts.com\/oil-pressure-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"oil pressure sensor\">oil pressure sensor<\/a> today at CarParts.com.<\/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\/oil-pressure-sensor\" target=\"_blank\" aria-label=\"Oil Pressure 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\/2561001_1\" alt=\"Oil Pressure Sensor\">\n<strong>Oil Pressure Sensor<\/strong>\n<\/a>\n\n<a href=\"https:\/\/www.carparts.com\/engine-control-module\" target=\"_blank\" aria-label=\"Engine Control Module\" 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\/a1721000_1\" alt=\"Engine Control Module\">\n<strong>Engine Control Module<\/strong>\n<\/a>\n\n<!-- end of editable content -->\n<\/div>\n\n\n\n<p><\/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>If your scan tool or code reader is showing the P0520 code, this guide will provide its definition, causes, and&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p0520-code-engine-oil-pressure-sensor-switch-a-circuit\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":16182,"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":[3354,1323,1838,1839],"ppma_author":[2607,2985],"class_list":{"0":"post-16167","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-car-engine-all-articles","9":"tag-engine-control-module-2","10":"tag-oil-pressure-sensor","11":"tag-oil-pressure-switch","12":"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>P0520 Code: Engine Oil Pressure Sensor\/Switch \u201cA\u201d Circuit - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Code P0520 is set if the oil pressure sensor fails to output the right voltage. This guide will help you troubleshoot and clear this code.\" \/>\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\/p0520-code-engine-oil-pressure-sensor-switch-a-circuit\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0520 Code: Engine Oil Pressure Sensor\/Switch \u201cA\u201d Circuit - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Code P0520 is set if the oil pressure sensor fails to output the right voltage. This guide will help you troubleshoot and clear this code.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/p0520-code-engine-oil-pressure-sensor-switch-a-circuit\/\" \/>\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=\"2022-04-13T07:53:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-08-20T03:30:27+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/oil-pressure-sensor.jpeg\" \/>\n\t<meta property=\"og:image:width\" content=\"1500\" \/>\n\t<meta property=\"og:image:height\" content=\"1118\" \/>\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=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0520-code-engine-oil-pressure-sensor-switch-a-circuit\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0520-code-engine-oil-pressure-sensor-switch-a-circuit\\\/\"},\"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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