{"id":93871,"date":"2023-10-06T20:28:16","date_gmt":"2023-10-07T03:28:16","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=93871"},"modified":"2023-12-13T01:24:56","modified_gmt":"2023-12-13T09:24:56","slug":"what-does-bas-mean-understanding-your-vehicles-brake-assist-system","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/what-does-bas-mean-understanding-your-vehicles-brake-assist-system\/","title":{"rendered":"What Does BAS Mean? Understanding Your Vehicle\u2019s Brake Assist System"},"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_f2965b-2d > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_f2965b-2d > .kt-inside-inner-col,.kadence-column_f2965b-2d > .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_f2965b-2d > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_f2965b-2d > .kt-inside-inner-col{flex-direction:column;}.kadence-column_f2965b-2d > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_f2965b-2d > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_f2965b-2d{position:relative;}@media all and (max-width: 1024px){.kadence-column_f2965b-2d > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_f2965b-2d > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_f2965b-2d qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-247a20  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-7b7c15\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_a8bbcd-91, .wp-block-kadence-advancedheading.kt-adv-heading_a8bbcd-91[data-kb-block=\"kb-adv-heading_a8bbcd-91\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_a8bbcd-91 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_a8bbcd-91[data-kb-block=\"kb-adv-heading_a8bbcd-91\"] 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_a8bbcd-91 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_a8bbcd-91[data-kb-block=\"kb-adv-heading_a8bbcd-91\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_a8bbcd-91 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_a8bbcd-91\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>The ESP BAS light could indicate an issue with your electronic stability program (ESP) or brake assist system.<\/li><li>This warning light may be triggered by a malfunctioning steering angle sensor, a faulty brake switch, bad wheel speed sensors, or wiring issues.<\/li><li>While your vehicle will continue to run with an illuminated ESP BAS light, it&rsquo;s best not to ignore it. Driving with a malfunctioning ESP or BAS system can be dangerous in rainy or snowy weather.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>A triggered dashboard light is almost always bad news, so if you see one turn on, you&rsquo;re going to want to put that high on your to-do list, especially if it&rsquo;s your ESP BAS light.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the ESP BAS Light Mean?<\/h2>\n\n\n\n<p>The ESP BAS light on your dashboard turns on when there&rsquo;s an issue with your electronic stability program (ESP) or brake assist system (BAS). You&rsquo;ll have to troubleshoot your vehicle to get an actual diagnosis, but here are some of the common causes for a triggered ESP BAS light:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Malfunctioning Steering Angle Sensor<\/h3>\n\n\n\n<p>If your ESP BAS light is on, then there&rsquo;s a big chance that it&rsquo;s all because of a failed steering angle sensor or it&rsquo;s out of calibration. The steering angle sensor monitors your steering wheel, making sure it&rsquo;s aligned with your wheels, so your vehicle can determine which way you&rsquo;re turning.<\/p>\n\n\n\n<p>A <a href=\"https:\/\/www.carparts.com\/blog\/steering-angle-sensor-what-it-is-symptoms-of-failure-types-and-more\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"faulty steering angle sensor\">faulty steering angle sensor<\/a> will likely send incorrect signals to your wheels and make it hard to drive. If this is what&rsquo;s tripping your ESP BAS light, then it&rsquo;s a good idea to fix it as soon as possible.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Faulty Brake Switch<\/h3>\n\n\n\n<p><a href=\"https:\/\/www.carparts.com\/brake-light-switch\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Brake switches\">Brake switches<\/a> are typically made to last, but things don&rsquo;t always go according to plan. Given how your brake switch goes into action every time you press down on the pedal, it&rsquo;s all too easy for it to break from wear and trigger your ESP BAS light.<\/p>\n\n\n\n<p>The <a href=\"https:\/\/www.carparts.com\/blog\/where-is-the-brake-light-switch-located\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"brake switch\">brake switch<\/a> is responsible for turning on your vehicle&rsquo;s rear brake lights, which means a bad brake switch will likely fail to turn on your rear brake lights whenever you&rsquo;re slowing down or stopping. This can lead to some serious traffic accidents, so you might want to fix your bad brake switch as soon as you can.<\/p>\n\n\n\n<p>Your vehicle may have two brake switches: one for the brake lights and another for things like cruise control, body control systems, etc. Make sure you know which one you are dealing with if you have more than one.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>Your vehicle may have two brake switches: one is for brake lights and other is for things like cruise control, body control systems, etc. Make sure you know which one you are dealing with if you have more than one.<\/p><cite>&ndash;<a href=\"https:\/\/www.carparts.com\/blog\/author\/anthonyharlin\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Anthony Harlin, ASE Certified Master Automobile Technician\">Anthony Harlin, ASE Certified Master Automobile Technician<\/a><\/cite><\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">Bad Wheel Speed Sensor<\/h3>\n\n\n\n<p>Each of your vehicle&rsquo;s wheels has a <a href=\"https:\/\/www.carparts.com\/abs-speed-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"speed sensor\">speed sensor<\/a>, which monitors the wheel&rsquo;s motion. Your vehicle&rsquo;s ESP and BAS rely on these sensors to monitor your vehicle&rsquo;s traction, so they can take appropriate action when your wheels start to slip.<\/p>\n\n\n\n<p>The ESP BAS light typically turns on when your vehicle loses traction, but it should turn off once your vehicle regains control. If it stays on, then there&rsquo;s a chance that your <a href=\"https:\/\/www.carparts.com\/blog\/symptoms-of-a-bad-wheel-speed-sensor-and-other-faq\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"wheel speed sensor is the issue\">wheel speed sensor is the issue<\/a>. Generally, however, a wheel speed sensor issue will turn on the anti-lock braking system (ABS) light first.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Wiring Issues<\/h3>\n\n\n\n<p>If any of the wires connected to your vehicle&rsquo;s <a href=\"https:\/\/www.carparts.com\/blog\/what-is-abs-how-does-it-work\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"ABS\">ABS<\/a> short-circuits, you&rsquo;re likely to find your ESP ABS light on.<\/p>\n\n\n\n<p><a href=\"https:\/\/www.carparts.com\/blog\/car-wiring\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Wiring problems\">Wiring problems<\/a> aren&rsquo;t common with most modern vehicles because of how well-protected the wires are, but it can definitely still happen and trigger your ESP BAS light.<\/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 Does the Brake Assist System Do?<\/h2>\n\n\n\n<p>While your vehicle&rsquo;s ESP consists of your vehicle&rsquo;s traction control system, ABS, and other systems related to traction issues, your BAS is in charge of increasing brake pressure whenever you suddenly slam on the brake pedal.<\/p>\n\n\n\n<p>It monitors the intensity, speed, and force of your foot when you step on the brakes, and once it detects a need for more support, it bypasses your brakes and applies even more pressure on your brake pads until your ABS kicks in and saves the day.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Are the Advantages of the BAS?<\/h2>\n\n\n\n<p>Did you know rear-end collisions are the most frequent type of collision in the US? They make up around 29% of all car crashes, and they cause a number of injuries and fatalities each year too.<\/p>\n\n\n\n<p>That&rsquo;s why brake assist systems are so important. They help drivers avoid rear-end collisions by applying the brakes during emergencies.<\/p>\n\n\n\n<p>Here are some other BAS advantages to consider:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Comes With a Brake Booster System<\/h3>\n\n\n\n<p>Most brake assist systems come with a <a href=\"https:\/\/www.carparts.com\/brake-booster\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"brake booster\">brake booster<\/a> system, which typically uses the engine pump or electric motor to lessen the amount of force you have to apply when stepping on the brake pedal.<\/p>\n\n\n\n<p>A lot of modern engines with turbochargers also have a vacuum pump to help the brake booster.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Allows for More Braking<\/h3>\n\n\n\n<p>In emergencies, applying too little pressure on the brakes can mean life and death, and research shows that most drivers tend to hesitate when hitting the brakes. This is when the BAS can be incredibly helpful. The added pressure it applies on your brakes significantly lowers your vehicle&rsquo;s speed and might even help you avoid a collision.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Adaptive Learning Technique<\/h3>\n\n\n\n<p>On some vehicles, the BAS comes with an adaptive learning technique that studies the driver&rsquo;s braking patterns. That way, it can tell the difference between stopping after a daily commute or an emergency situation.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Can You Drive With the ESP BAS Light on?<\/h2>\n\n\n\n<p>Your vehicle certainly won&rsquo;t stop running if your ESP BAS light is on, but it&rsquo;s still a bad idea to ignore it. Driving around with a triggered ESP BAS light is a recipe for disaster, especially in rainy or snowy weather.<\/p>\n\n\n\n<p>If the ESP or BAS lights are on solid, then this just means they are not going to operate, so you will not have that added security when driving. Braking is all on the driver with no help from the vehicle systems.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How To Reset the ESP BAS Light<\/h2>\n\n\n\n<p>There are a couple of things you can do to fix your ESP BAS light. For one, you can try replacing whatever faulty component is causing it to turn on. Of course, this also means you&rsquo;ll have to troubleshoot and find the culprit first.<\/p>\n\n\n\n<p>In some cases, fixing the steering angle sensor should do the trick. However, you&rsquo;ll have to first have the ability to reset it with a scan tool that has that capability. Second, you have to make sure you have a quality part. Third, you should never replace a part without first scanning to see what the problem is and then confirming if the part in question is the problem or just where the computer sees the problem. The part named in a code description is not necessarily the problem.<\/p>\n\n\n\n<p>You can also try fixing the sensors by turning your steering wheel. Here&rsquo;s a general process:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Turn on your vehicle&rsquo;s engine.<\/li><li>Turn the steering wheel two times to the right and then two times to the left.<\/li><li>Return the steering wheel to the center so your wheels face forward.<\/li><\/ul>\n\n\n\n<p>Your ESP BAS light should turn off after your steering wheel goes back to normal, but if it doesn&rsquo;t work, you might have to recalibrate or replace your steering angle sensor. Sometimes, the answer to fixing your ESP BAS light could also be installing a new brake switch sensor or wheel speed sensor.<\/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\"> 5<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>A triggered dashboard light is almost always bad news, so if you see one turn on, you&rsquo;re going to want&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/what-does-bas-mean-understanding-your-vehicles-brake-assist-system\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":93930,"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":[52,3751],"tags":[],"ppma_author":[2607,3742],"class_list":{"0":"post-93871","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-diy","8":"category-warning-lights","9":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What Does BAS Mean? Understanding Your Vehicle\u2019s Brake Assist System - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Wondering what the BAS light on your dashboard means? Learn all about your vehicle\u2019s brake assist system, what it does, and its advantages.\" \/>\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\/what-does-bas-mean-understanding-your-vehicles-brake-assist-system\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What Does BAS Mean? Understanding Your Vehicle\u2019s Brake Assist System - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Wondering what the BAS light on your dashboard means? Learn all about your vehicle\u2019s brake assist system, what it does, and its advantages.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/what-does-bas-mean-understanding-your-vehicles-brake-assist-system\/\" \/>\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=\"2023-10-07T03:28:16+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-12-13T09:24:56+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/10\/esp-bas-light.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1500\" \/>\n\t<meta property=\"og:image:height\" content=\"1000\" \/>\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=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/what-does-bas-mean-understanding-your-vehicles-brake-assist-system\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/what-does-bas-mean-understanding-your-vehicles-brake-assist-system\\\/\"},\"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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