{"id":70727,"date":"2022-08-09T23:27:00","date_gmt":"2022-08-10T06:27:00","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=70727"},"modified":"2026-02-17T23:17:13","modified_gmt":"2026-02-18T07:17:13","slug":"p018c-code-fuel-pressure-sensor-b-circuit-low","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p018c-code-fuel-pressure-sensor-b-circuit-low\/","title":{"rendered":"P018C Code: Fuel Pressure Sensor &#8220;B&#8221; 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-column70727_49b1b8-da > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column70727_49b1b8-da > .kt-inside-inner-col,.kadence-column70727_49b1b8-da > .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-column70727_49b1b8-da > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column70727_49b1b8-da > .kt-inside-inner-col{flex-direction:column;}.kadence-column70727_49b1b8-da > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column70727_49b1b8-da > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column70727_49b1b8-da{position:relative;}@media all and (max-width: 1024px){.kadence-column70727_49b1b8-da > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column70727_49b1b8-da > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column70727_49b1b8-da inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-53db72  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-793965\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading70727_675f0a-6c, .wp-block-kadence-advancedheading.kt-adv-heading70727_675f0a-6c[data-kb-block=\"kb-adv-heading70727_675f0a-6c\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading70727_675f0a-6c mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading70727_675f0a-6c[data-kb-block=\"kb-adv-heading70727_675f0a-6c\"] 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-heading70727_675f0a-6c img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading70727_675f0a-6c[data-kb-block=\"kb-adv-heading70727_675f0a-6c\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading70727_675f0a-6c summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading70727_675f0a-6c\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>DTC P018C stands for &ldquo;Fuel Pressure Sensor &ldquo;B&rdquo; Circuit Low.&rdquo; The PCM logs this code when it detects a faulty fuel pressure sensor, wiring issues, and base fuel system problems like a bad fuel pump.<\/li>\n\n\n\n<li>Stalling, rough running, and increased fuel consumption are telltale signs of a P018C code.<\/li>\n\n\n\n<li>To check your vehicle for this code, you can use a scan tool to compare your vehicle&rsquo;s desired and actual fuel pressures.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>In a returnless fuel system, a fuel pressure sensor measures the force exerted by the fluid flowing through the fuel rail. It sends its readings to the fuel pump control module (FCM) or 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). The computer adjusts fuel system pressure to continue setting the best fuel-air mixture for the engine to combust.<\/p>\n\n\n\n<p>If the control module does not detect a normal change in fuel pressure from the fuel pressure sensor after activating the pump, it will log a P018C code.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P018C Code Mean?<\/h2>\n\n\n\n<p>The <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) P018C indicates &ldquo;Fuel Pressure Sensor &ldquo;B&rdquo; Circuit Low.&rdquo;<\/p>\n\n\n\n<p>Whenever you drive your car, the engine will need different amounts of fuel. Any shift in the flow through the fuel rail will result in a change in pressure. The fuel pressure sensor turns these pressure changes into signal voltages and sends them to the control module.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"641\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/Fuel-Pressure-Sensor-of-an-Automotive-Car-1024x641.jpg\" alt=\"Fuel Pressure Sensor of an Automotive Car\" class=\"wp-image-70741\" style=\"width:1024px;height:641px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/Fuel-Pressure-Sensor-of-an-Automotive-Car-1024x641.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/Fuel-Pressure-Sensor-of-an-Automotive-Car-300x188.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/Fuel-Pressure-Sensor-of-an-Automotive-Car-768x481.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/Fuel-Pressure-Sensor-of-an-Automotive-Car-1536x961.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/Fuel-Pressure-Sensor-of-an-Automotive-Car-150x94.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/Fuel-Pressure-Sensor-of-an-Automotive-Car.jpg 1700w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">In a returnless fuel system, a fuel pressure sensor measures the force exerted by the fluid flowing through the fuel rail.<\/figcaption><\/figure>\n\n\n\n<p>The control module adjusts fuel system pressure using these readings.<\/p>\n\n\n\n<p>The control module compares the signal voltage from the fuel pressure sensor with data stored in its memory. If it detects a lower-than-normal voltage signal that is different from the expected signal, it will turn on the check engine light. It will also log the OBD-II code P018C.<\/p>\n\n\n\n<p><strong><em>Note:<\/em><\/strong><em> The definition of code P018C can differ according to the vehicle manufacturer. Check 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 P018C Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.carparts.com\/blog\/bad-engine-control-module-ecm-symptoms-repair-replacement-cost\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Faulty PCM\">Faulty PCM<\/a><\/li>\n\n\n\n<li>Bad fuel pressure sensor<\/li>\n\n\n\n<li>Issues with the fuel pressure sensor or PCM wiring<\/li>\n\n\n\n<li>Base fuel system problems, such as a <a href=\"https:\/\/www.carparts.com\/blog\/how-to-diagnose-a-faulty-fuel-pump\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"faulty fuel pump\">faulty fuel pump<\/a><\/li>\n<\/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 P018C Code?<\/h2>\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 performance problems, such as <a href=\"https:\/\/www.carparts.com\/blog\/car-shuts-off-while-driving-causes-what-to-do\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"stalling\">stalling<\/a> and rough running<\/li>\n\n\n\n<li>Higher fuel consumption<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P018C Code<\/h2>\n\n\n\n<p>Diagnosing your vehicle for the reason behind the P018C code takes some effort. Inspect the wiring leading to the fuel pressure sensor for any signs of damage or loose connectors.<\/p>\n\n\n\n<p>If the wires are clear, use a scan tool to monitor the desired and actual l fuel pressures. If there is a discrepancy, start the engine. This should raise the signal voltage as well. If it doesn&rsquo;t, the fuel pressure sensor is probably at fault.<\/p>\n\n\n\n<p>Here are some videos that may give you 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-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Chevrolet Malibu: Fuel Pressure Sensor Trouble P018B P018C P2635\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/4DB5Cn5mDhY?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<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\">\nhttps:\/\/www.youtube.com\/watch?v=xCiHmiQlZlM\n<\/div><\/figure>\n\n\n\n<p>If you&rsquo;re not confident about conducting diagnostic tests on your vehicle, it&rsquo;s a good idea to bring it to a professional mechanic.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Fix the P018C Code<\/h2>\n\n\n\n<p>Attempting to fix a P018C code can become a frustrating task if you don&rsquo;t have the right tools and know-how to test the fuel pressure sensor. In most cases, it&rsquo;s best to leave the job to professionals.<br>For DIYers with advanced technical knowledge and hands-on experience, it will be helpful to rely on the appropriate <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 refer to an online repair database\">repair manual or refer to an online repair database<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Getting a Replacement Fuel Pressure Sensor for Your Vehicle<\/h2>\n\n\n\n<p>A damaged fuel pressure sensor is usually the culprit behind a P018C code, which means replacing it would clear the trouble code. Fortunately, getting a replacement fuel pressure sensor is easy when you shop online here at CarParts.com.<\/p>\n\n\n\n<p>You won&rsquo;t even have to step outside your home to get your hands on a brand-new fuel pressure sensor for your vehicle. All you need to do is use your mobile phone and visit <a href=\"https:\/\/www.carparts.com\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"CarParts.com\">CarParts.com<\/a>. Input your daily driver&rsquo;s year, make, and model into our vehicle selector to narrow down the catalog to compatible parts.<\/p>\n\n\n\n<p>To guarantee their quality, we source our fuel pressure sensors from the most trusted manufacturers in the industry. All our products are on hand and ready to ship from strategically located warehouses across the US. This means you&rsquo;ll be able to receive your order in only a few days.<\/p>\n\n\n\n<p>Don&rsquo;t hold off on replacing a faulty fuel pressure sensor. Check out our high-quality <a href=\"https:\/\/www.carparts.com\/fuel-pressure-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"fuel pressure sensors\">fuel pressure sensors<\/a> now at CarParts.com.<\/p>\n\n\n\n<div class=\"shop-project\">\n\n    <h2>Shop this Project<\/h2>\n\n    <ul class=\"shop-project-list\">\n        \n        <li>\n            <div class=\"shop-project-item\">\n                <div class=\"stp-image-url\">\n                    <a href=\"https:\/\/www.carparts.com\/details\/fuel-pressure-sensor\/replacement\/repb543601\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label='&lt;img src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/repb543601_1\" alt=\"Replacement &ndash; Fuel Pressure Sensor &ndash; Direct Fit, Sold individually\" \/&gt;'><img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/repb543601_1\" alt=\"Replacement &ndash; Fuel Pressure Sensor &ndash; Direct Fit, Sold individually\"><\/a>\n                <\/div>\n\n                <div class=\"stp-desc\">\n                                            <p class=\"stp-title\">\n                            <a href=\"https:\/\/www.carparts.com\/details\/fuel-pressure-sensor\/replacement\/repb543601\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Replacement &ndash; Fuel Pressure Sensor &ndash; Direct Fit, Sold individually\">Replacement &ndash; Fuel Pressure Sensor &ndash; Direct Fit, Sold individually<\/a>\n                        <\/p>\n                    \n                    <div class=\"stp-stars\">\n                        <img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/q_auto,dpr_auto,f_auto\/carparts\/blog\/widgets\/shop-project\/stars\/star-4.5.svg\" alt=\"4.5 Stars\">\n                    <\/div>\n\n                                            <p class=\"stp-price\">$15.99<\/p>\n                    \n                    <p><small>Price and rating may change from the time content is published.<\/small><\/p>\n\n                                            <p class=\"stp-cta\">\n                            <a href=\"https:\/\/www.carparts.com\/details\/fuel-pressure-sensor\/replacement\/repb543601\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Shop Now\">Shop Now<\/a>\n                        <\/p>\n                                    <\/div>\n\n            <\/div>\n        <\/li>\n\n        \n        <li>\n            <div class=\"shop-project-item\">\n                <div class=\"stp-image-url\">\n                    <a href=\"https:\/\/www.carparts.com\/details\/fuel-pump\/drivemotive\/repc314539\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label='&lt;img src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/repc314539_1\" alt=\" DriveMotive &ndash; Fuel Pump, With Fuel Sending Unit\" \/&gt;'><img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/repc314539_1\" alt=\" DriveMotive &ndash; Fuel Pump, With Fuel Sending Unit\"><\/a>\n                <\/div>\n\n                <div class=\"stp-desc\">\n                                            <p class=\"stp-title\">\n                            <a href=\"https:\/\/www.carparts.com\/details\/fuel-pump\/drivemotive\/repc314539\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"DriveMotive &ndash; Fuel Pump, With Fuel Sending Unit\">DriveMotive &ndash; Fuel Pump, With Fuel Sending Unit<\/a>\n                        <\/p>\n                    \n                    <div class=\"stp-stars\">\n                        <img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/q_auto,dpr_auto,f_auto\/carparts\/blog\/widgets\/shop-project\/stars\/star-4.5.svg\" alt=\"4.5 Stars\">\n                    <\/div>\n\n                                            <p class=\"stp-price\">$63.99<\/p>\n                    \n                    <p><small>Price and rating may change from the time content is published.<\/small><\/p>\n\n                                            <p class=\"stp-cta\">\n                            <a href=\"https:\/\/www.carparts.com\/details\/fuel-pump\/drivemotive\/repc314539\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Shop Now\">Shop Now<\/a>\n                        <\/p>\n                                    <\/div>\n\n            <\/div>\n        <\/li>\n\n            <\/ul>\n<\/div>\n\n\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>In a returnless fuel system, a fuel pressure sensor measures the force exerted by the fluid flowing through the fuel&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p018c-code-fuel-pressure-sensor-b-circuit-low\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":1651,"featured_media":70740,"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":[1463],"ppma_author":[2607,2855],"class_list":{"0":"post-70727","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-fuel-pressure-sensor","9":"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>P018C Code: Fuel Pressure Sensor &quot;B&quot; Circuit Low - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Learn what a P018C code means, its possible causes, and the common symptoms associated with it. 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