{"id":18202,"date":"2021-07-01T23:50:00","date_gmt":"2021-07-02T06:50:00","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=18202"},"modified":"2024-06-27T08:55:29","modified_gmt":"2024-06-27T15:55:29","slug":"p00b7-code-engine-coolant-flow-low-performance","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p00b7-code-engine-coolant-flow-low-performance\/","title":{"rendered":"P00B7 Code: Engine Coolant Flow Low \/ Performance"},"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\"> 5<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column_6e3a3c-13 > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_6e3a3c-13 > .kt-inside-inner-col,.kadence-column_6e3a3c-13 > .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_6e3a3c-13 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_6e3a3c-13 > .kt-inside-inner-col{flex-direction:column;}.kadence-column_6e3a3c-13 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_6e3a3c-13 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_6e3a3c-13{position:relative;}@media all and (max-width: 1024px){.kadence-column_6e3a3c-13 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_6e3a3c-13 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_6e3a3c-13 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-3ca5ca  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-28cd47\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_444310-c9, .wp-block-kadence-advancedheading.kt-adv-heading_444310-c9[data-kb-block=\"kb-adv-heading_444310-c9\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_444310-c9 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_444310-c9[data-kb-block=\"kb-adv-heading_444310-c9\"] 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_444310-c9 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_444310-c9[data-kb-block=\"kb-adv-heading_444310-c9\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_444310-c9 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_444310-c9\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>DTC P00B7 stands for &ldquo;Engine Coolant Flow Low\/Performance.&rdquo;<\/li><li>This code is logged when the PCM perceives insufficient coolant flow through the cooling system.<\/li><li>Code P00B7 is commonly caused by low coolant levels, faulty thermostats, bad water pumps, or malfunctioning ECT sensors.<\/li><li>Common symptoms to watch out for include an illuminated check engine light, overheating engine, and abnormal temperature gauge readings.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>An <a href=\"https:\/\/www.carparts.com\/blog\/search-obd2-codes-list\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"OBD-II code\">OBD-II code<\/a> is designed to alert you of the potential problems your car may have. To resolve it, you must first know what the logged code entails. If you&rsquo;re finding it difficult to figure out what code P00B7 means, you&rsquo;ve come to the right place. Read on to learn about its possible triggers and common symptoms.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P00B7 Code Mean?<\/h2>\n\n\n\n<p>Diagnostic trouble code (DTC) P00B7 stands for &ldquo;Engine Coolant Flow Low\/Performance.&rdquo; This code is logged when the powertrain control module (PCM) perceives insufficient coolant flow through the cooling system. <\/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\/2020\/10\/coolant-flow-1024x683.jpeg\" alt=\"coolant flow\" class=\"wp-image-18206\" width=\"1024\" height=\"683\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/coolant-flow-1024x683.jpeg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/coolant-flow-300x200.jpeg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/coolant-flow-768x512.jpeg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/coolant-flow-600x400.jpeg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/coolant-flow-150x100.jpeg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/coolant-flow.jpeg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>Code P00B7 may register if the PCM perceives insufficient coolant flow through the cooling system.<\/figcaption><\/figure>\n\n\n\n<p>This trouble code is set when the correlating signals between the <a href=\"https:\/\/www.carparts.com\/coolant-temperature-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"engine coolant temperature (ECT) sensor\">engine coolant temperature (ECT) sensor<\/a> and the radiator coolant temperature sensor (or secondary engine coolant temperature sensor) exceed the allowable threshold, which tends to happen if the ECM\/PCM can&rsquo;t control thermostat operation. The ECM\/PCM perceives this discrepancy in signals as the result of a low or restricted engine coolant flow. In other words, the extra temperature sensor acts as part of a feedback loop to help the ECM\/PCM control the <a href=\"https:\/\/www.carparts.com\/thermostat\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"thermostat\">thermostat<\/a>, thereby also controlling engine temperature.<\/p>\n\n\n\n<p>The PCM monitors both sensors to determine if there is sufficient coolant flow to keep the engine at operating temperature.<\/p>\n\n\n\n<p>When the PCM concludes that the coolant flow is too low because of this huge difference in temperature between the ECT sensor and the radiator coolant temperature sensor, the <a href=\"https:\/\/www.carparts.com\/radiator-fan\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"radiator fan(s)\">radiator fan(s)<\/a> may be set to high. The PCM does this to prevent the overheating of the engine.<\/p>\n\n\n\n<p>Take note that this code typically only appears on vehicles with <strong>electric thermostats<\/strong>. Electrically controlled thermostats use expanding wax like old thermostats did, but a heater coil surrounding the wax capsule controls the temperature of the wax, and the ECM\/PCM modulates voltage to the heater coil to more closely control the thermostat&rsquo;s regulation of coolant flow.<\/p>\n\n\n\n<p>Of course, for this method of controlling the thermostat to work properly, the temperature of the coolant in the radiator must be monitored and compared to the temperature of the coolant in the block and the thermostat is triggered accordingly. If the heating coil fails, the thermostat will still operate the way older thermostats did, but the PCM has far less control of coolant temperature.<\/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<p><em><strong>Note: <\/strong>The definition of code P00B7 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<h2 class=\"wp-block-heading\">What are the Possible Causes of the P00B7 Code?<\/h2>\n\n\n\n<p>Here are some common triggers of the error code P00B7:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Low coolant levels<\/li><li>Cooling system issues, such as a <a href=\"https:\/\/www.carparts.com\/blog\/what-are-the-common-signs-of-a-bad-thermostat\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"faulty thermostat\">faulty thermostat<\/a> or bad <a href=\"https:\/\/www.carparts.com\/water-pump\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"water pump\">water pump<\/a><\/li><li><a href=\"https:\/\/www.carparts.com\/blog\/engine-coolant-temperature-sensor-purpose-location-and-failure-signs\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Broken ECT sensor\">Broken ECT sensor<\/a><\/li><li>Defective radiator coolant temperature sensor<\/li><li>Wiring issues<\/li><li>Failing PCM<\/li><\/ul>\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\/2020\/10\/water-pump-1024x1024.jpeg\" alt=\"water pump\" class=\"wp-image-18207\" width=\"1024\" height=\"1024\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/water-pump-1024x1024.jpeg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/water-pump-300x300.jpeg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/water-pump-768x768.jpeg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/water-pump-75x75.jpeg 75w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/water-pump-600x600.jpeg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/water-pump-928x928.jpeg 928w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/water-pump-150x150.jpeg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/water-pump.jpeg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>A faulty water pump can trigger code P00B7.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Common Symptoms of the P00B7 Code?<\/h2>\n\n\n\n<p>You may notice the following symptoms if you drive a car that has a logged P00B7 error code:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Illuminated <a href=\"https:\/\/www.carparts.com\/blog\/check-engine-light-flashing\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"check engine light\">check engine light<\/a><\/li><li>Overheating engine<\/li><li>Abnormal temperature gauge readings <\/li><li>Rough running <\/li><li>Poor fuel economy<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P00B7 Code<\/h2>\n\n\n\n<p>To avoid complications, code P00B7 should be resolved immediately. However, diagnosing this code can be a struggle, as it has many possible triggers. To make sure you&rsquo;re on the right path, the diagnostic and repair steps should always depend on the specifications of your vehicle.<\/p>\n\n\n\n<p>Because all cars are built differently, they would also require different diagnoses. A P00B7 on a Chevy, for instance, may require a different diagnosis process from a P00B7 on a Honda. Refer to a repair manual specific to your vehicle for the appropriate automotive diagnostic steps.<\/p>\n\n\n\n<p>However, if you feel like your automotive know-how is lacking, it would be best to let the professionals handle the diagnosis of this trouble code instead. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Fix the P00B7 Code<\/h2>\n\n\n\n<p>The P00B7 code may share similar triggers and symptoms with other DTCs. However, that does not mean it also shares their fixes. All vehicles are different, so you should always refer to the factory repair information specific to your car before DIY-ing any repairs. <\/p>\n\n\n\n<p>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> before attempting any fixes. Look for confirmed solutions that are specific to your vehicle. If you aren&rsquo;t confident in your automotive repair skills, it may be best to enlist the help of a professional.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Enjoy Fast Delivery of Replacement Parts For Your Car<\/h2>\n\n\n\n<p>When your PCM sets the P00B7 code because of a faulty engine coolant temperature sensor, replace the part immediately. Engine issues are costly to repair, so you&rsquo;ll want to avoid more possible problems. Fortunately, CarParts.com expedites your car&rsquo;s repair by shipping replacement engine coolant temperature sensors straight to your doorstep.<\/p>\n\n\n\n<p>At CarParts.com, we pride ourselves on fast delivery of replacement parts like engine coolant temperature sensors. When you purchase a product from our online store, our nearest distribution warehouse ships your new part right away. If you live anywhere in the continental US and order by noon ET, you can expect the new parts to reach your home in as fast as two business days. We also make it easy to find engine coolant temperature sensors that fit your car. Just plug your vehicle&rsquo;s details into our website&rsquo;s built-in vehicle selector. Furthermore, you can rest assured about your new parts&rsquo; durability because we exclusively source our products from manufacturers trusted by drivers across the US.<\/p>\n\n\n\n<p>Get great deals on reliable replacement parts at CarParts.com. Browse our wide selection of <a href=\"https:\/\/www.carparts.com\/coolant-temperature-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"coolant temperature sensors\">coolant temperature sensors<\/a> today!<\/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\/coolant-temperature-sensor\" target=\"_blank\" aria-label=\"Coolant Temperature 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\/repf312802_1\">\n<strong>Coolant Temperature Sensor<\/strong>\n<\/a>\n\n<a href=\"https:\/\/www.carparts.com\/thermostat\" target=\"_blank\" aria-label=\"Thermostat\" 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\/reps318002_1\">\n<strong>Thermostat<\/strong>\n<\/a>\n\n<a href=\"https:\/\/www.carparts.com\/water-pump\" target=\"_blank\" aria-label=\"Water Pump\" 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\/repb313504_1\">\n<strong>Water Pump<\/strong>\n<\/a>\n\n<!-- end of editable content -->\n\n<\/div>\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\"> 5<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>An OBD-II code is designed to alert you of the potential problems your car may have. To resolve it, you&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p00b7-code-engine-coolant-flow-low-performance\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":18209,"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":[1252,1323,1167,1188],"ppma_author":[2607,2985],"class_list":{"0":"post-18202","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-coolant-temperature-sensor","9":"tag-engine-control-module-2","10":"tag-radiator-fan-2","11":"tag-water-pump-2","12":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P00B7 Code: Engine Coolant Flow Low \/ Performance - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Find out what code P00B7 means, its typical triggers and symptoms, and what you can do to resolve it. Read on for more information.\" \/>\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\/p00b7-code-engine-coolant-flow-low-performance\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P00B7 Code: Engine Coolant Flow Low \/ Performance - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Find out what code P00B7 means, its typical triggers and symptoms, and what you can do to resolve it. 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