{"id":18463,"date":"2022-07-15T02:19:00","date_gmt":"2022-07-15T09:19:00","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=18463"},"modified":"2024-07-19T09:25:50","modified_gmt":"2024-07-19T16:25:50","slug":"p0104-code-mass-air-flow-maf-a-circuit-intermittent-erratic","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p0104-code-mass-air-flow-maf-a-circuit-intermittent-erratic\/","title":{"rendered":"P0104 Code: Mass Air Flow (MAF) \u201cA\u201d Circuit Intermittent \/ Erratic"},"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-column_9a71d6-c8 > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_9a71d6-c8 > .kt-inside-inner-col,.kadence-column_9a71d6-c8 > .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_9a71d6-c8 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_9a71d6-c8 > .kt-inside-inner-col{flex-direction:column;}.kadence-column_9a71d6-c8 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_9a71d6-c8 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_9a71d6-c8{position:relative;}@media all and (max-width: 1024px){.kadence-column_9a71d6-c8 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_9a71d6-c8 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_9a71d6-c8 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-1fa63e  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-04b4c2\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_adfd53-0a, .wp-block-kadence-advancedheading.kt-adv-heading_adfd53-0a[data-kb-block=\"kb-adv-heading_adfd53-0a\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_adfd53-0a mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_adfd53-0a[data-kb-block=\"kb-adv-heading_adfd53-0a\"] 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_adfd53-0a img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_adfd53-0a[data-kb-block=\"kb-adv-heading_adfd53-0a\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_adfd53-0a summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_adfd53-0a\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>Code P0104 is logged once the PCM senses an erratic voltage signal from the MAF sensor circuit.<\/li><li>The common causes of a P0104 code include intake air leaks, wiring\/harness issues, and PCM problems. A failed or dirty MAF sensor can also cause the P0104 code.<\/li><li>Some common symptoms of this error code include hard starting, lack of acceleration, and engine stalling.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p class=\"wp-block-paragraph\">Your vehicle is equipped with <a href=\"https:\/\/www.carparts.com\/blog\/car-engine-sensors\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"various sensors\">various sensors<\/a> that are crucial to its operation. A mass air flow (MAF) sensor, for example, is one of the key components of the engine&rsquo;s fuel injection system. It measures the amount of air entering the engine so that the powertrain control module (PCM) would know how much fuel is needed by the engine.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">P0104 is an engine trouble code related to a possible issue in your vehicle&rsquo;s MAF sensor circuit. The information below might help you understand this code better.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P0104 Code Mean?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><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) P0104 stands for &ldquo;Mass Air Flow (MAF) &ldquo;A&rdquo; Circuit Intermittent\/Erratic.&rdquo; It may be logged once the PCM perceives that the MAF sensor frequency signal is not within the expected range based on the calculated MAF value.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This sensor is usually installed in the engine air intake tract downstream from the air filter. It measures the amount of air entering the engine by calculating its volume and density. A MAF sensor only measures a portion of intake air and uses this value to estimate the total volume and density of air entering your engine.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The data is sent to the PCM through a voltage &nbsp;or hertz signal. Once the PCM perceives an erratic voltage output from the MAF sensor circuit, it will trigger the code.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">P0104 is similar to other MAF circuit trouble codes, such as <a href=\"https:\/\/www.carparts.com\/blog\/p0100-code-mass-or-volume-air-flow-a-circuit\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"P0100\">P0100<\/a>, <a href=\"https:\/\/www.carparts.com\/blog\/p0101-code-mass-or-volume-air-flow-a-circuit-range-performance\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"P0101\">P0101<\/a>, <a href=\"https:\/\/www.carparts.com\/blog\/p0102-code-mass-air-flow-maf-circuit-low\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"P0102\">P0102<\/a>, and <a href=\"https:\/\/www.carparts.com\/blog\/p0103-code-mass-or-volume-air-flow-a-circuit-high\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"P0103\">P0103<\/a>.<\/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\/closeup-of-mass-air-flow-sensor-of-car-at-air-filter-housing-1024x682.jpeg\" alt=\"closeup of mass air flow sensor of car at air filter housing\" class=\"wp-image-18465\" width=\"1024\" height=\"682\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/closeup-of-mass-air-flow-sensor-of-car-at-air-filter-housing-1024x682.jpeg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/closeup-of-mass-air-flow-sensor-of-car-at-air-filter-housing-300x200.jpeg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/closeup-of-mass-air-flow-sensor-of-car-at-air-filter-housing-768x511.jpeg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/closeup-of-mass-air-flow-sensor-of-car-at-air-filter-housing-600x400.jpeg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/closeup-of-mass-air-flow-sensor-of-car-at-air-filter-housing-150x100.jpeg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/closeup-of-mass-air-flow-sensor-of-car-at-air-filter-housing.jpeg 1509w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>P0104 may be logged once the PCM perceives that the MAF sensor frequency signal is not within the expected range based on the calculated MAF value.<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">It&rsquo;s important to note that there is a certain window the ECM\/PCM will accept as normal. If the signal coming from the MAF sensor drops below that acceptable window, a code is set. The code is different from one manufacturer to the next, so you may get a different code on your vehicle that means the same thing this code does.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Make sure you have a thorough understanding of <a href=\"https:\/\/www.carparts.com\/blog\/p0102-code-mass-air-flow-maf-circuit-low\/#An_In-Depth_Look_at_Mass_Air_Flow\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"mass air flow\">mass air flow<\/a> before proceeding with any DIY diagnosis or repair of your vehicle.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><em>Note:<\/em><\/strong><em> The definition of code P0104 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 P0104 Code?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Here are the possible triggers of the P0104 code:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/www.carparts.com\/blog\/symptoms-of-failing-mass-air-flow-sensor\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Failed\/dirty MAF sensor\">Failed\/dirty MAF sensor<\/a><\/li><li>Intake air leaks<\/li><li>MAF sensor wiring\/harness issues<\/li><li>Issues with the PCM, such as software in need of an update<\/li><\/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 a P0104 Code?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The symptoms of code P0104 may include the following:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><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><li><a href=\"https:\/\/www.carparts.com\/blog\/car-shuts-off-while-driving-causes-what-to-do\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Engine stalling\">Engine stalling<\/a><\/li><li>Hard starting<\/li><li>Rough running engine<\/li><li><a href=\"https:\/\/www.carparts.com\/blog\/smoke-from-exhaust-meaning\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Black smoke from tailpipe\">Black smoke from tailpipe<\/a><\/li><li>Lack of acceleration<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">You may also experience other drivability symptoms due to this trouble code. However, in some cases, your vehicle may not exhibit any symptoms at all.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P0104 Code<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">It&rsquo;s tricky to diagnose a P0104 code. Engine misfire and oxygen sensor codes may also be logged together with this code, so it may be very challenging to diagnose the root cause of the problem.<\/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\/2022\/07\/mechanic-male-gets-obd-code-after-performing-a-car-inspection-1024x682.jpg\" alt=\"mechanic male gets obd code after performing a car inspection\" class=\"wp-image-70612\" width=\"1024\" height=\"682\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/mechanic-male-gets-obd-code-after-performing-a-car-inspection-1024x682.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/mechanic-male-gets-obd-code-after-performing-a-car-inspection-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/mechanic-male-gets-obd-code-after-performing-a-car-inspection-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/mechanic-male-gets-obd-code-after-performing-a-car-inspection-1536x1024.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/mechanic-male-gets-obd-code-after-performing-a-car-inspection-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/mechanic-male-gets-obd-code-after-performing-a-car-inspection-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/07\/mechanic-male-gets-obd-code-after-performing-a-car-inspection.jpg 1700w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>Engine misfire and oxygen sensor codes may also be logged together with this code, so it may be very challenging to diagnose the root cause of the problem.<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">If you&rsquo;re not an experienced automotive DIYer, it is best to take your vehicle to an auto repair shop for proper diagnosis and repair. However, if you prefer to diagnose this code yourself, you may consult vehicle-specific <a href=\"https:\/\/www.carparts.com\/blog\/why-you-should-always-consult-a-repair-manual\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"repair manuals and\/or online repair databases\">repair manuals and\/or online repair databases<\/a>. These resources will contain the information you need to properly diagnose your vehicle.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Fix the P0104 Code<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Although P0104 is a generic trouble code, there is no one solution that would work for all makes and models. Remember that modern cars are structured differently per manufacturer. Repair procedures for this code may vary depending on the vehicle. For instance, the confirmed fixes of a code P0104 on a Toyota may not work for a code P0104 on a Mercedes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you&rsquo;d like to resolve the code yourself, it would be best to consult vehicle-specific repair manuals and\/or subscribe to an online repair database. These resources contain specific instructions that can help you address vehicle issues like faulty sensors.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">However, if you&rsquo;re not well-versed in auto repair, you can always bring your vehicle to an auto repair shop for proper diagnosis and repair.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Where to Get a New MAF Sensor and MAF Connector<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Before anything else, you should avoid driving until you fix whatever&rsquo;s causing the P0104 code to set in your vehicle. Error codes all point to a bigger issue that can sometimes be costly to repair if ignored. In this case, a P0104 code is usually because of a faulty MAF sensor or damaged MAF sensor connectors. Luckily, you can easily get both products at CarParts.com with just a few clicks.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At CarParts.com, we offer a wide selection of high-quality MAF sensors and MAF sensor connectors that you can choose from. Providing you with a worry-free shopping experience is one of our top priorities. You can shop with confidence, thanks to our 60-day returns policy. In case you aren&rsquo;t completely satisfied with your order, you can return your order within 60 days of purchase, and we&rsquo;ll give you your money back.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Don&rsquo;t wait until other parts of your vehicle act up before replacing defective parts. Check out our wide selection of <a href=\"https:\/\/www.carparts.com\/mass-air-flow-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"mass air flow sensors\">mass air flow sensors<\/a> and <a href=\"https:\/\/www.carparts.com\/mass-air-flow-sensor-connector\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"mass air flow sensor connectors\">mass air flow sensor connectors<\/a> at CarParts.com, and shop today!<\/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>Your vehicle is equipped with various sensors that are crucial to its operation. A mass air flow (MAF) sensor, for&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p0104-code-mass-air-flow-maf-a-circuit-intermittent-erratic\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":18466,"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":[204],"ppma_author":[2607,2985],"class_list":["post-18463","post","type-post","status-publish","format-standard","has-post-thumbnail","category-obd-ii-trouble-codes","tag-mass-air-flow-sensor","entry"],"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P0104 Code: Mass Air Flow (MAF) \u201cA\u201d Circuit Intermittent \/ Erratic - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"P0104 is related to a possible issue in the MAF sensor circuit. 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Richard has worked for nearly 50 years in the automotive field as a professional technician, an instructor, a freelance automotive writer for Motor Age, ACtion magazine, Power Stroke Registry, and others (published every year since May 2000). He has developed training courses and written or edited training material for companies in the U.S. Canada, and the Netherlands, and even Bulgaria. He maintained an \u201cask a mechanic\u201d website for 10 years answering questions emailed to him from all over the world.\r\n\r\nRichard has an instructional automotive YouTube channel \u201cMcCuistian\u201d with 13,500 subscribers and over 1,300 videos. Much of his professional work requires photography and videography in shop environments, but Richard also enjoys taking pictures of landscapes, skyscapes, old barns and houses, small towns. He has produced a coffee table book of digital watercolors called \u201cMemories of South Alabama\u201d created from his personal photos, along with a dozen Christian fiction short original novels and a collection of short stories, all available in Kindle or softcover format. 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He has won two International Automotive Media Awards for technical articles published in trade magazines.<\/p><\/li>\r\n<li><p>Has attended hundreds of hours of automotive training from OEMs including GM, Volkswagen, Mazda, Renault, Jeep, Chrysler, as well as additional training at events like KC Vision and MACS (Mobile Air Climate Systems Association).<\/p><\/li>\r\n<li><p>Taught college level auto mechanics for 19 years.<\/p><\/li>\r\n<li><p>Has written for automotive training companies (including course development work for training companies in Canada and the Netherlands) and has been hired to teach professional trade show technician courses at multiple training events in Texas and Alabama.<\/p><\/li>\r\n<li><p>While still teaching at the college level, Richard launched a new automotive program in Geneva, Alabama, setting up a dual enrollment department in a new building, organizing the shop and classroom, teaching morning classes to high school students for 2 years while still teaching at the college in the afternoon.<\/p><\/li>\r\n<li><p>Richard\u2019s college program at Lurleen B. 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