{"id":39244,"date":"2021-05-21T16:04:06","date_gmt":"2021-05-21T23:04:06","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=39244"},"modified":"2023-10-23T17:29:10","modified_gmt":"2023-10-24T00:29:10","slug":"what-could-cause-codes-p0115-and-p0118-on-a-1996-buick-roadmaster","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/what-could-cause-codes-p0115-and-p0118-on-a-1996-buick-roadmaster\/","title":{"rendered":"What Could Cause Codes P0115 and P0118 on a 1996 Buick Roadmaster?"},"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\"> 2<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column_5c6b25-b3 > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_5c6b25-b3 > .kt-inside-inner-col,.kadence-column_5c6b25-b3 > .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_5c6b25-b3 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_5c6b25-b3 > .kt-inside-inner-col{flex-direction:column;}.kadence-column_5c6b25-b3 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_5c6b25-b3 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_5c6b25-b3{position:relative;}@media all and (max-width: 1024px){.kadence-column_5c6b25-b3 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_5c6b25-b3 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_5c6b25-b3 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-31e261  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-4e65ef\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_b11be0-96, .wp-block-kadence-advancedheading.kt-adv-heading_b11be0-96[data-kb-block=\"kb-adv-heading_b11be0-96\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_b11be0-96 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_b11be0-96[data-kb-block=\"kb-adv-heading_b11be0-96\"] 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_b11be0-96 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_b11be0-96[data-kb-block=\"kb-adv-heading_b11be0-96\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_b11be0-96 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_b11be0-96\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>Codes P0115 and P0118 are set when the PCM detects a temperature problem.<\/li><li>If the engine coolant temperature sensor has been replaced and the codes are still present, there could be a circuit problem in the wiring and connector.<\/li><li>You might need to test the circuit and refer to the factory wiring diagram of the sensor to confirm your diagnosis. If you&rsquo;re not used to conducting this type of test on your own, it&rsquo;s best to have a professional do the job for you instead.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Q: I have a 1996 Buick Roadmaster with a 5.7L engine. Codes P0118 and P0115 are set. I changed both temperature sensors, but that did not fix the problem. What could be causing these codes to reset?<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">&ndash; Ernesto from Vado<\/h3>\n\n\n\n<p><strong>A: <\/strong>Hello, Ernesto. Codes P0118 and <a href=\"https:\/\/www.carparts.com\/blog\/p0115-code-engine-coolant-temperature-sensor-1-circuit\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"P0115\">P0115<\/a> both stand for Engine Coolant Temperature (ECT) Sensor Circuit High Voltage. On your car, these codes are set when the powertrain control module (PCM) perceives the engine coolant temperature to be less than -40 degrees Fahrenheit for 4.5 seconds or more.&nbsp;<\/p>\n\n\n\n<p>As you pointed out, your car has two temperature sensors: one for the gauge and one for the PCM. Code P0118 applies to the PCM feedback sensor, which is the one that&rsquo;s mounted in the water pump. You can disregard the sensor for the gauge, as it has nothing to do with this code.&nbsp;&nbsp;<\/p>\n\n\n\n<p>On your car, the PCM provides both a 5-volt reference and ground to the <a href=\"https:\/\/www.carparts.com\/coolant-temperature-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"ECT sensor\">ECT sensor<\/a>. The PCM monitors the changes in reference voltage caused by the sensor&rsquo;s varying internal resistance. The voltage is high when the engine is cold and low when the engine is hot.&nbsp;<\/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>Since you&rsquo;ve already replaced the ECT sensor, we&rsquo;ll assume that the sensor is good. That indicates there&rsquo;s a problem somewhere in the ECT sensor&rsquo;s circuit that is causing the code to reset. You&rsquo;ll need to pinpoint the circuit problem to fix the code.&nbsp;<\/p>\n\n\n\n<p>Start by performing a visual inspection of the sensor&rsquo;s wiring and connector, looking for issues, such as damaged wires or corrosion.&nbsp; <\/p>\n\n\n\n<p>Should you find that everything looks okay, you&rsquo;ll need to move on to testing the sensor&rsquo;s circuit. If you have the tools and the know-how, you can obtain a copy of the factory wiring diagram (through a <a href=\"https:\/\/www.carparts.com\/blog\/why-you-should-always-consult-a-repair-manual\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"repair database\">repair database<\/a>) and troubleshoot the problem yourself. Otherwise, it might be best to let a professional tackle the job for you.<\/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?&amp;vehicle%5Byear%5D=1996&amp;vehicle%5Bmake%5D=Buick&amp;vehicle%5Bmodel%5D=Roadmaster\" 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\/sistdtx3_1\">\n<strong>Coolant Temperature Sensor<\/strong>\n<\/a>\n\n<a href=\"https:\/\/www.carparts.com\/search?q=Engine_Control_Module&amp;vehicle%5Bmodel%5D=Roadmaster&amp;vehicle%5Bmake%5D=Buick&amp;vehicle%5Byear%5D=1996\" 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\/h19550604_1\">\n<strong>Engine Control Module<\/strong>\n<\/a>\n\n<!-- end of editable content -->\n\n<\/div>\n\n\n\n<script type=\"application\/ld+json\">\n{\n   \"@context\": \"https:\/\/schema.org\",\n   \"@type\": \"QAPage\",\n   \"mainEntity\": {\n      \"@type\": \"Question\",\n      \"name\": \"What Could Cause Codes P0115 and P0118 on a 1996 Buick Roadmaster?\",\n      \"text\": \"I have a 1996 Buick Roadmaster with a 5.7L engine. Codes P0118 and P0115 are set. I changed both temperature sensors, but that did not fix the problem. What could be causing these codes to reset?\",\n      \"answerCount\": 1,\n      \"upvoteCount\": 0,\n      \"dateCreated\": \"2021-05-21T23:04:06Z\",\n      \"dateModified\": \"2021-05-24T08:37:06Z\",\n      \"author\": {\n         \"@type\": \"Person\",\n         \"name\": \"Ernesto from Vado\"\n      },\n      \"acceptedAnswer\": {\n         \"@type\": \"Answer\",\n         \"text\": \"Hello, Ernesto. Codes P0118 and P0115 both stand for Engine Coolant Temperature (ECT) Sensor Circuit High Voltage. On your car, these codes are set when the powertrain control module (PCM) perceives the engine coolant temperature to be less than -40 degrees Fahrenheit for 4.5 seconds or more.\",\n         \"upvoteCount\": 0,\n         \"url\": \"https:\/\/www.carparts.com\/blog\/what-could-cause-codes-p0115-and-p0118-on-a-1996-buick-roadmaster\/\",\n         \"dateCreated\": \"2021-05-21T16:04:00Z\",\n         \"author\": {\n            \"@type\": \"Person\",\n            \"name\": \"Mia Bevacqua, ASE Certified Master Automobile Technician\"\n         }\n      }\n   }\n}\n<\/script>\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\"> 2<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>Q: I have a 1996 Buick Roadmaster with a 5.7L engine. Codes P0118 and P0115 are set. I changed both&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/what-could-cause-codes-p0115-and-p0118-on-a-1996-buick-roadmaster\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":29,"featured_media":0,"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":"dateModified 2021-05-24T083706Z","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[3010],"tags":[3013],"ppma_author":[2622],"class_list":{"0":"post-39244","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-ask","7":"tag-1996-buick-roadmaster","8":"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>What Could Cause Codes P0115 and P0118 on a 1996 Buick Roadmaster? - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"What could cause codes P0115 and P0118 on a 1996 Buick Roadmaster? 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