{"id":517579,"date":"2025-12-10T06:00:14","date_gmt":"2025-12-10T11:00:14","guid":{"rendered":"https:\/\/www.fs1inc.com\/blog\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\/"},"modified":"2025-12-10T06:00:14","modified_gmt":"2025-12-10T11:00:14","slug":"dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1","status":"publish","type":"post","link":"https:\/\/www.fs1inc.com\/blog\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\/","title":{"rendered":"P0428 Code Symptoms, Causes, Diagnosis and Repair Overview Guide"},"content":{"rendered":"<div class=\"container\">\n<section class=\"hero\">\n<div class=\"code-badge\">P0428<\/div>\n<h1>P0428 Code Symptoms, Causes, Diagnosis and Repair Overview Guide<\/h1>\n<p class=\"hero-subtitle\">\n<\/section>\n<div class=\"quick-summary\">\n<h2>Quick Summary<\/h2>\n<ul>\n<li>P0428 = \u201cCatalyst Temperature Sensor Circuit High Bank 1 Sensor 1.\u201d <\/li>\n<li>Drivers typically see a check\u2011engine light, possible loss of fuel\u2011efficiency, or an emissions\u2011test failure. <\/li>\n<li>The fault most often originates from sensor signal anomalies, wiring problems, or ECM\/PCM communication errors. <\/li>\n<li>Diagnosis starts with a scan, voltage checks, and a communication test of the power\u2011train control module. <\/li>\n<li>Replacement of the control module is recommended when repairs are temporary or when re\u2011programming fails. <\/li>\n<li>Flagship One supplies VIN\u2011matched, pre\u2011programmed modules that restore proper sensor communication.<\/li>\n<\/ul>\n<\/div>\n<h3>Introduction <\/h3>\n<p>When the check\u2011engine lamp flashes and an emissions scan returns P0428, the vehicle\u2019s on\u2011board computer has detected a \u201cCatalyst Temperature Sensor Circuit High\u201d condition on Bank 1, Sensor 1. Most owners first notice the warning light during a routine drive, followed by a subtle drop in miles\u2011per\u2011gallon or a brief hesitation that disappears once the engine settles. In many cases the fault does not affect immediate drivability, but it can cause an emissions\u2011test failure and may mask deeper electronic issues. Because the sensor\u2019s signal travels through the power\u2011train control module, a misreading often points to a communication or programming problem rather than a simple sensor defect. Early, module\u2011focused diagnosis prevents unnecessary part swaps and restores reliable emissions monitoring.<\/p>\n<h2>Symptoms <\/h2>\n<ul>\n<li><strong>Check\u2011engine light illuminated<\/strong> with P0428 stored in the diagnostic memory. <\/li>\n<li><strong>Slight reduction in fuel economy<\/strong> (typically 1\u20113 mpg) as the engine may run richer to compensate for perceived catalyst inefficiency. <\/li>\n<li><strong>Brief loss of power or hesitation<\/strong> during rapid acceleration, usually lasting a second before normal response returns. <\/li>\n<li><strong>Emissions\u2011test failure<\/strong> for the catalyst efficiency portion of the test, even when the vehicle otherwise runs smoothly. <\/li>\n<li><strong>No unusual noises or drivability issues<\/strong> beyond the above; the engine generally continues to operate normally.<\/li>\n<\/ul>\n<h2>Why This Happens <\/h2>\n<h3>Faulty Sensor Signal (High Voltage) <\/h3>\n<p>The catalyst temperature sensor generates a voltage proportional to exhaust temperature. A short to voltage, a damaged sensor element, or exposure to extreme heat can push the signal above the calibrated maximum, prompting the ECM\/PCM to set P0428.<\/p>\n<h3>Wiring Harness Defects <\/h3>\n<p>Corroded connectors, broken wires, or high\u2011resistance grounds in the sensor circuit can cause voltage spikes. A shorted harness may intermittently feed the module a high voltage, triggering the fault without a permanent sensor failure.<\/p>\n<h3>ECM\/PCM Communication Fault <\/h3>\n<p>The power\u2011train control module processes the sensor voltage and compares it to expected ranges. Internal circuit board damage, water intrusion, or corrupted software can cause the module to misinterpret a normal sensor voltage as \u201chigh,\u201d resulting in a false P0428.<\/p>\n<h3>Exhaust Temperature Anomalies <\/h3>\n<p>A severely overheated catalyst\u2014often due to prolonged short\u2011trip driving or a malfunctioning upstream component\u2014can legitimately raise sensor voltage. In such cases, the ECM\/PCM may still flag the condition if its temperature thresholds are exceeded.<\/p>\n<h3>Software Calibration Issues <\/h3>\n<p>After a major ECU flash or after replacement of related modules, the calibration tables for catalyst temperature may be outdated. An un\u2011reprogrammed module can misread a valid sensor voltage as out\u2011of\u2011range, generating P0428.<\/p>\n<h2>Diagnostic and Repair Procedures <\/h2>\n<ol>\n<li><strong>Retrieve and Confirm the Code<\/strong>\n<\/li>\n<\/ol>\n<p> &#8211; Connect a professional OBD\u2011II scanner. Verify that P0428 is present and note any additional codes (e.g., P0429, P0135) that may indicate related sensor or module faults. <\/p>\n<ol>\n<li><strong>Inspect Sensor Wiring<\/strong>\n<\/li>\n<\/ol>\n<p> &#8211; Visually examine the connector at the catalyst temperature sensor for corrosion, bent pins, or broken harness. <\/p>\n<p> &#8211; Perform a resistance check between the sensor\u2019s signal wire and ground; values should be within the manufacturer\u2019s specification (typically 1\u20112 k\u03a9). <\/p>\n<ol>\n<li><strong>Measure Sensor Voltage<\/strong>\n<\/li>\n<\/ol>\n<p> &#8211; With the engine at idle and then at 2,500 rpm, measure the sensor\u2019s voltage using a multimeter. Expected range is usually 0.5\u20111.5 V; readings above 2.5 V indicate a \u201chigh\u201d condition. <\/p>\n<ol>\n<li><strong>Test ECM\/PCM Communication<\/strong>\n<\/li>\n<\/ol>\n<p> &#8211; Use a scan tool capable of bidirectional control to request live data from the ECM\/PCM. Verify that the module reports the sensor voltage accurately. <\/p>\n<p> &#8211; Conduct a communication integrity test (often labeled \u201cECU communication test\u201d on dealer tools) to detect internal circuit board faults. <\/p>\n<ol>\n<li><strong>Re\u2011program or Update the Module<\/strong>\n<\/li>\n<\/ol>\n<p> &#8211; If the sensor and wiring are sound, load the latest software calibration for the ECM\/PCM. Many manufacturers release updates that adjust catalyst temperature thresholds. <\/p>\n<p> &#8211; Re\u2011flash the module using a dealer\u2011level programmer; cost typically ranges from $150\u2011$250 for labor plus any required software licensing fees. <\/p>\n<ol>\n<li><strong>Module Repair vs. Replacement<\/strong>\n<\/li>\n<\/ol>\n<p> &#8211; Should the communication test reveal internal failures (e.g., moisture\u2011induced shorts on the board), a repair may be temporary. <\/p>\n<p> &#8211; Replacement of the ECM\/PCM is recommended when the module repeatedly fails diagnostics after re\u2011programming. <\/p>\n<ol>\n<li><strong>Clear Codes and Verify<\/strong>\n<\/li>\n<\/ol>\n<p> &#8211; After repairs or re\u2011programming, clear the diagnostic memory and drive the vehicle for at least 30 minutes under varied conditions. Confirm that P0428 does not return. <\/p>\n<p><strong>Cost Overview<\/strong> <\/p>\n<ul>\n<li>Diagnostic scan and live\u2011data analysis: $80\u2011$120. <\/li>\n<li>Sensor voltage and wiring inspection (labor): $100\u2011$150. <\/li>\n<li>ECM\/PCM software update: $150\u2011$250. <\/li>\n<li>ECM\/PCM replacement (including VIN\u2011matched programming): $800\u2011$1,200 plus $200\u2011$300 labor.<\/li>\n<\/ul>\n<h2>When Replacement Makes More Sense Than Repair <\/h2>\n<div class=\"flagship-logo-section\">\n<a href=\"https:\/\/www.fs1inc.com\/\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<img decoding=\"async\" alt=\"Flagship One\" class=\"flagship-logo\" src=\"https:\/\/www.fs1inc.com\/blog\/wp-content\/uploads\/2025\/12\/fs1inc_logo2-scaled.jpg\"\/><br \/>\n<\/a>\n<\/div>\n<p>If the ECM\/PCM fails the communication integrity test, exhibits intermittent power\u2011loss symptoms, or continues to set P0428 after multiple re\u2011programming attempts, replacement is the more reliable path. Repeated repairs on a compromised board often lead to recurring failures, especially when moisture or heat damage is present. <\/p>\n<p>Modern control modules are complex and integrated with security and immobilizer systems. That&#8217;s why choosing a replacement isn&#8217;t only about the hardware\u2014it&#8217;s about correct programming and compatibility. <strong>Flagship One<\/strong> specializes in VIN\u2011matched control modules, providing a plug\u2011and\u2011drive solution backed by warranty. Their units are pre\u2011programmed to the exact software version required for your vehicle, eliminating the need for dealer\u2011only re\u2011flashing and reducing installation time.<\/p>\n<h2>Preventive Maintenance <\/h2>\n<ul>\n<li><strong>Inspect Exhaust System Regularly<\/strong> \u2013 Look for cracks or leaks that could cause abnormal catalyst temperatures. <\/li>\n<li><strong>Maintain Proper Engine Operating Temperature<\/strong> \u2013 Ensure the cooling system is functioning; low coolant can overheat the catalyst. <\/li>\n<li><strong>Use OEM\u2011Approved Engine Coolants<\/strong> \u2013 Corrosive additives can damage sensor wiring over time. <\/li>\n<li><strong>Schedule Periodic ECU\/PCM Software Updates<\/strong> \u2013 Manufacturers often release calibration tweaks that keep sensor thresholds accurate. <\/li>\n<li><strong>Avoid Prolonged Short\u2011Trip Driving<\/strong> \u2013 Frequent cold starts prevent the catalyst from reaching optimal temperature, reducing thermal stress on the sensor.<\/li>\n<\/ul>\n<div class=\"info-section\">\n<p><strong>Service Recommendation:<\/strong> Most issues related to this fault are diagnosed and corrected through inspection, wiring repair, and calibration rather than module replacement. For modules not typically replaced through aftermarket suppliers, diagnosis and repair should be performed by a certified automotive technician with access to factory service information and tooling.<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Check engine light and emissions on your vehicle? P0428 = Catalyst Temperature Sensor Circuit High Bank 1 Sensor 1\u2014emissions failure. Scan, replace sensor.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-517579","post","type-post","status-publish","format-standard","hentry","category-auto-news"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P0428 Code Symptoms, Causes, Diagnosis and Repair Overview Guide - Flagship One Blog<\/title>\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.fs1inc.com\/blog\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0428 Code Symptoms, Causes, Diagnosis and Repair Overview Guide - Flagship One Blog\" \/>\n<meta property=\"og:description\" content=\"Check engine light and emissions on your vehicle? P0428 = Catalyst Temperature Sensor Circuit High Bank 1 Sensor 1\u2014emissions failure. Scan, replace sensor.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\/\" \/>\n<meta property=\"og:site_name\" content=\"Flagship One Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/flagshipone\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/flagshipone\/\" \/>\n<meta property=\"article:published_time\" content=\"2025-12-10T11:00:14+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.fs1inc.com\/blog\/wp-content\/uploads\/2025\/12\/fs1inc_logo2-scaled.jpg\" \/>\n<meta name=\"author\" content=\"FlagshipOne\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@theflagshipone\" \/>\n<meta name=\"twitter:site\" content=\"@theflagshipone\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"FlagshipOne\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\\\/\"},\"author\":{\"name\":\"FlagshipOne\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#\\\/schema\\\/person\\\/a3cf463514bd03eb7656953ef8f75700\"},\"headline\":\"P0428 Code Symptoms, Causes, Diagnosis and Repair Overview Guide\",\"datePublished\":\"2025-12-10T11:00:14+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\\\/\"},\"wordCount\":1107,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/fs1inc_logo2-scaled.jpg\",\"articleSection\":[\"Auto News\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\\\/\",\"url\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\\\/\",\"name\":\"P0428 Code Symptoms, Causes, Diagnosis and Repair Overview Guide - Flagship One Blog\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/fs1inc_logo2-scaled.jpg\",\"datePublished\":\"2025-12-10T11:00:14+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/fs1inc_logo2-scaled.jpg\",\"contentUrl\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/fs1inc_logo2-scaled.jpg\",\"width\":2560,\"height\":617},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"P0428 Code Symptoms, Causes, Diagnosis and Repair Overview Guide\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#website\",\"url\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/\",\"name\":\"Flagship One Blog\",\"description\":\"Flagship One Inc. OEM Engine Computers  Control Modules\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#organization\",\"name\":\"Flagship One, Inc.\",\"url\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/wp-content\\\/uploads\\\/2019\\\/06\\\/web-lg-fs1-logo.png\",\"contentUrl\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/wp-content\\\/uploads\\\/2019\\\/06\\\/web-lg-fs1-logo.png\",\"width\":1341,\"height\":1098,\"caption\":\"Flagship One, Inc.\"},\"image\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/flagshipone\",\"https:\\\/\\\/x.com\\\/theflagshipone\",\"https:\\\/\\\/www.instagram.com\\\/flagship_one\",\"https:\\\/\\\/www.youtube.com\\\/channel\\\/UC0oyKphffBM2qkJ-gKPmMXw\"]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#\\\/schema\\\/person\\\/a3cf463514bd03eb7656953ef8f75700\",\"name\":\"FlagshipOne\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/351b81e51993825aea73280c48061a7205fdd2189730ebbdee5d63894c5cebb4?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/351b81e51993825aea73280c48061a7205fdd2189730ebbdee5d63894c5cebb4?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/351b81e51993825aea73280c48061a7205fdd2189730ebbdee5d63894c5cebb4?s=96&d=mm&r=g\",\"caption\":\"FlagshipOne\"},\"description\":\"The world's top supplier of programmed OEM (Original Equipment Manufacturer) Powertrain Control Modules (PCM), Engine Control Modules (ECM), Injection Control Modules (IDM), Body Control Modules (BCM), Transmission Control Modules (TCM), Engine Control Units and all other car control units. With over a decade in the business, we are the most reliable source when it comes to programming services for replacement engine control modules.\",\"sameAs\":[\"https:\\\/\\\/www.fs1inc.com\\\/\",\"https:\\\/\\\/www.facebook.com\\\/flagshipone\\\/\",\"https:\\\/\\\/www.instagram.com\\\/flagship_one\\\/\",\"https:\\\/\\\/www.linkedin.com\\\/company\\\/fs1inc\"],\"url\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/author\\\/flagship1inc\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"P0428 Code Symptoms, Causes, Diagnosis and Repair Overview Guide - Flagship One Blog","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.fs1inc.com\/blog\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\/","og_locale":"en_US","og_type":"article","og_title":"P0428 Code Symptoms, Causes, Diagnosis and Repair Overview Guide - Flagship One Blog","og_description":"Check engine light and emissions on your vehicle? P0428 = Catalyst Temperature Sensor Circuit High Bank 1 Sensor 1\u2014emissions failure. Scan, replace sensor.","og_url":"https:\/\/www.fs1inc.com\/blog\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\/","og_site_name":"Flagship One Blog","article_publisher":"https:\/\/www.facebook.com\/flagshipone","article_author":"https:\/\/www.facebook.com\/flagshipone\/","article_published_time":"2025-12-10T11:00:14+00:00","og_image":[{"url":"https:\/\/www.fs1inc.com\/blog\/wp-content\/uploads\/2025\/12\/fs1inc_logo2-scaled.jpg","type":"","width":"","height":""}],"author":"FlagshipOne","twitter_card":"summary_large_image","twitter_creator":"@theflagshipone","twitter_site":"@theflagshipone","twitter_misc":{"Written by":"FlagshipOne","Est. reading time":"5 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\/#article","isPartOf":{"@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\/"},"author":{"name":"FlagshipOne","@id":"https:\/\/www.fs1inc.com\/blog\/#\/schema\/person\/a3cf463514bd03eb7656953ef8f75700"},"headline":"P0428 Code Symptoms, Causes, Diagnosis and Repair Overview Guide","datePublished":"2025-12-10T11:00:14+00:00","mainEntityOfPage":{"@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\/"},"wordCount":1107,"commentCount":0,"publisher":{"@id":"https:\/\/www.fs1inc.com\/blog\/#organization"},"image":{"@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\/#primaryimage"},"thumbnailUrl":"https:\/\/www.fs1inc.com\/blog\/wp-content\/uploads\/2025\/12\/fs1inc_logo2-scaled.jpg","articleSection":["Auto News"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.fs1inc.com\/blog\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\/","url":"https:\/\/www.fs1inc.com\/blog\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\/","name":"P0428 Code Symptoms, Causes, Diagnosis and Repair Overview Guide - Flagship One Blog","isPartOf":{"@id":"https:\/\/www.fs1inc.com\/blog\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\/#primaryimage"},"image":{"@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\/#primaryimage"},"thumbnailUrl":"https:\/\/www.fs1inc.com\/blog\/wp-content\/uploads\/2025\/12\/fs1inc_logo2-scaled.jpg","datePublished":"2025-12-10T11:00:14+00:00","breadcrumb":{"@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.fs1inc.com\/blog\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\/#primaryimage","url":"https:\/\/www.fs1inc.com\/blog\/wp-content\/uploads\/2025\/12\/fs1inc_logo2-scaled.jpg","contentUrl":"https:\/\/www.fs1inc.com\/blog\/wp-content\/uploads\/2025\/12\/fs1inc_logo2-scaled.jpg","width":2560,"height":617},{"@type":"BreadcrumbList","@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p0428-catalyst-temperature-sensor-circuit-high-bank-1-sensor-1\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.fs1inc.com\/blog\/"},{"@type":"ListItem","position":2,"name":"P0428 Code Symptoms, Causes, Diagnosis and Repair Overview Guide"}]},{"@type":"WebSite","@id":"https:\/\/www.fs1inc.com\/blog\/#website","url":"https:\/\/www.fs1inc.com\/blog\/","name":"Flagship One Blog","description":"Flagship One Inc. OEM Engine Computers  Control Modules","publisher":{"@id":"https:\/\/www.fs1inc.com\/blog\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.fs1inc.com\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.fs1inc.com\/blog\/#organization","name":"Flagship One, Inc.","url":"https:\/\/www.fs1inc.com\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.fs1inc.com\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/www.fs1inc.com\/blog\/wp-content\/uploads\/2019\/06\/web-lg-fs1-logo.png","contentUrl":"https:\/\/www.fs1inc.com\/blog\/wp-content\/uploads\/2019\/06\/web-lg-fs1-logo.png","width":1341,"height":1098,"caption":"Flagship One, Inc."},"image":{"@id":"https:\/\/www.fs1inc.com\/blog\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/flagshipone","https:\/\/x.com\/theflagshipone","https:\/\/www.instagram.com\/flagship_one","https:\/\/www.youtube.com\/channel\/UC0oyKphffBM2qkJ-gKPmMXw"]},{"@type":"Person","@id":"https:\/\/www.fs1inc.com\/blog\/#\/schema\/person\/a3cf463514bd03eb7656953ef8f75700","name":"FlagshipOne","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/351b81e51993825aea73280c48061a7205fdd2189730ebbdee5d63894c5cebb4?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/351b81e51993825aea73280c48061a7205fdd2189730ebbdee5d63894c5cebb4?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/351b81e51993825aea73280c48061a7205fdd2189730ebbdee5d63894c5cebb4?s=96&d=mm&r=g","caption":"FlagshipOne"},"description":"The world's top supplier of programmed OEM (Original Equipment Manufacturer) Powertrain Control Modules (PCM), Engine Control Modules (ECM), Injection Control Modules (IDM), Body Control Modules (BCM), Transmission Control Modules (TCM), Engine Control Units and all other car control units. With over a decade in the business, we are the most reliable source when it comes to programming services for replacement engine control modules.","sameAs":["https:\/\/www.fs1inc.com\/","https:\/\/www.facebook.com\/flagshipone\/","https:\/\/www.instagram.com\/flagship_one\/","https:\/\/www.linkedin.com\/company\/fs1inc"],"url":"https:\/\/www.fs1inc.com\/blog\/author\/flagship1inc\/"}]}},"_links":{"self":[{"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/posts\/517579","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/comments?post=517579"}],"version-history":[{"count":0,"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/posts\/517579\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/media?parent=517579"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/categories?post=517579"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/tags?post=517579"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}