{"id":518887,"date":"2025-12-11T02:29:04","date_gmt":"2025-12-11T07:29:04","guid":{"rendered":"https:\/\/www.fs1inc.com\/blog\/dtc-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\/"},"modified":"2025-12-11T02:29:04","modified_gmt":"2025-12-11T07:29:04","slug":"dtc-p3404-cylinder-1-deactivationintake-valve-control-circuit-high","status":"publish","type":"post","link":"https:\/\/www.fs1inc.com\/blog\/dtc-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\/","title":{"rendered":"P3404 Code Symptoms, Causes, Diagnosis &#038; Repair Guide &#8211; Step-by-Step"},"content":{"rendered":"<div class=\"container\">\n<section class=\"hero\">\n<div class=\"code-badge\">P3404<\/div>\n<h1>P3404 Code Symptoms, Causes, Diagnosis &amp; Repair Guide &#8211; Step-by-Step<\/h1>\n<p class=\"hero-subtitle\">\n<\/section>\n<div class=\"quick-summary\">\n<h2>Quick Summary<\/h2>\n<ul>\n<li>P3404 means \u201cCylinder 1 Deactivation\/Intake Valve Control Circuit High.\u201d <\/li>\n<li>Typical alerts: check\u2011engine light, rough idle, reduced fuel\u2011efficiency, loss of cylinder\u2011deactivation benefit. <\/li>\n<li>Primary culprits: faulty ECM\/PCM communication, damaged valve\u2011actuator wiring, or a malfunctioning intake\u2011valve actuator. <\/li>\n<li>Diagnosis centers on scanning, voltage checks, and module communication tests. <\/li>\n<li>Replacement of the ECM\/PCM is often the most reliable fix; Flagship One provides VIN\u2011matched, pre\u2011programmed units. <\/li>\n<\/ul>\n<\/div>\n<h3>Introduction <\/h3>\n<p>Drivers who encounter a flashing or steady check\u2011engine light often wonder why the engine feels uneven or why fuel mileage drops suddenly. When the ECM detects an abnormal voltage level in the circuit that controls Cylinder 1\u2019s deactivation and intake\u2011valve actuation, it stores the P3404 code. The result is a loss of the cylinder\u2011deactivation strategy that improves efficiency on many modern engines. Because the fault originates in the control module\u2019s communication with the valve\u2011actuator circuit, early detection prevents unnecessary wear on the engine\u2019s mechanical components. Understanding the warning signs, the electrical causes, and the proper diagnostic path lets you decide whether a simple repair will suffice or a module replacement is warranted.<\/p>\n<h2>Symptoms <\/h2>\n<ul>\n<li><strong>Check\u2011engine illumination<\/strong> \u2013 the MIL (malfunction\u2011indicator lamp) lights solid or flashes after a drive cycle. <\/li>\n<li><strong>Rough idle<\/strong> \u2013 engine speed wavers between 600\u2011800 rpm, especially when the vehicle is stopped. <\/li>\n<li><strong>Reduced fuel economy<\/strong> \u2013 owners notice a drop of 2\u20114 mpg compared with normal figures. <\/li>\n<li><strong>Loss of cylinder\u2011deactivation benefit<\/strong> \u2013 the engine runs on all cylinders at all times, eliminating the expected fuel\u2011saving \u201ccylinder\u2011on\u2011demand\u201d operation. <\/li>\n<li><strong>Transient power loss<\/strong> \u2013 mild hesitation during light acceleration, often mistaken for a misfire but without accompanying misfire codes. <\/li>\n<\/ul>\n<p>These signs appear together because the ECM disables the deactivation function when it detects an out\u2011of\u2011range voltage, reverting to a default full\u2011cylinder mode.<\/p>\n<h2>Why Cylinder Deactivation Problems Occur <\/h2>\n<h3>Faulty ECM\/PCM Communication <\/h3>\n<p>The ECM monitors voltage on the intake\u2011valve actuator line. Corrosion, broken pins, or a failing internal processor can cause the module to read a high voltage condition even when the actuator is normal. A compromised communication bus (CAN) can also inject spurious signals that trigger P3404.<\/p>\n<h3>Damaged Valve\u2011Actuator Wiring or Connectors <\/h3>\n<p>The high\u2011voltage circuit that drives the intake\u2011valve actuator runs through heat\u2011exposed harnesses. Cracked insulation, chafed wires, or moisture ingress can raise the voltage seen by the ECM, prompting the fault.<\/p>\n<h3>Malfunctioning Intake\u2011Valve Actuator <\/h3>\n<p>Modern deactivation systems use a solenoid or motor to open and close the intake valve on the deactivated cylinder. Internal short circuits within the actuator can produce a constant high\u2011voltage reading, even if the ECM itself is healthy.<\/p>\n<h3>Software Glitches or Calibration Errors <\/h3>\n<p>Occasionally, a corrupted calibration file or outdated software version misinterprets normal voltage ranges, flagging a false high\u2011voltage condition. Re\u2011flashing the ECM with the latest calibration often resolves the issue.<\/p>\n<h2>Diagnostic and Repair Procedures <\/h2>\n<ol>\n<li><strong>Retrieve and Verify the Code<\/strong>\n<\/li>\n<\/ol>\n<p> &#8211; Connect a professional OBD\u2011II scanner. Confirm P3404 and note any accompanying codes (e.g., P0400\u2011P0409 for EGR, which may indicate broader intake\u2011system issues). <\/p>\n<ol>\n<li><strong>Inspect Wiring and Connectors<\/strong>\n<\/li>\n<\/ol>\n<p> &#8211; Visually examine the intake\u2011valve actuator harness for cracked insulation, corrosion, or loose pins. <\/p>\n<p> &#8211; Perform a continuity test on the high\u2011voltage line (typically 12 V) using a multimeter. Resistance should be near zero; any open circuit points to wiring failure. <\/p>\n<ol>\n<li><strong>Measure Circuit Voltage<\/strong>\n<\/li>\n<\/ol>\n<p> &#8211; With the engine at idle, measure voltage at the ECM\u2019s input terminal for the actuator circuit. Values exceeding 12.5 V (manufacturer\u2011specified high limit) confirm a \u201ccircuit high\u201d condition. <\/p>\n<ol>\n<li><strong>Test the Actuator Directly<\/strong>\n<\/li>\n<\/ol>\n<p> &#8211; Apply 12 V to the actuator using a bench power supply while monitoring current draw. An abnormal current (e.g., &gt;2 A for a solenoid rated at 0.5 A) suggests an internal short. <\/p>\n<ol>\n<li><strong>ECM\/PCM Communication Test<\/strong>\n<\/li>\n<\/ol>\n<p> &#8211; Use a scan tool that can perform a CAN\u2011bus integrity check. Look for error frames, missing acknowledgments, or bus\u2011off events. <\/p>\n<ol>\n<li><strong>Software Update \/ Re\u2011calibration<\/strong>\n<\/li>\n<\/ol>\n<p> &#8211; If wiring and actuator tests are clean, re\u2011flash the ECM with the latest manufacturer software. This step clears potential calibration errors that misinterpret voltage levels. <\/p>\n<ol>\n<li><strong>Component\u2011Level Repair<\/strong>\n<\/li>\n<\/ol>\n<p> &#8211; When a specific wire or connector is faulty, replace the damaged section with OEM\u2011spec wire and crimped terminals. <\/p>\n<p> &#8211; A defective actuator can sometimes be repaired by cleaning contacts or replacing a failed coil, but most technicians recommend module\u2011level replacement for reliability. <\/p>\n<ol>\n<li><strong>Verify Resolution<\/strong>\n<\/li>\n<\/ol>\n<p> &#8211; Clear all codes, run the engine through a full drive cycle, and re\u2011scan. Absence of P3404 and a stable idle indicate successful repair. <\/p>\n<p><strong>Cost Estimates<\/strong> <\/p>\n<ul>\n<li>Professional scan and basic wiring inspection: $80\u2011$120. <\/li>\n<li>Actuator bench test and voltage measurement: $100\u2011$150 (labor). <\/li>\n<li>ECM software update: $120\u2011$180 plus any required re\u2011programming fees. <\/li>\n<li>If replacement is needed, a remanufactured ECM\/PCM typically costs $600\u2011$900, with labor $150\u2011$250.<\/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>In many cases, the high\u2011voltage fault stems from internal degradation of the ECM\u2019s power\u2011stage circuitry. While wire repairs or actuator swaps can temporarily clear the code, the underlying module may fail again as temperature cycles continue. A full module replacement eliminates the risk of recurring voltage spikes and restores the calibrated cylinder\u2011deactivation strategy.<\/p>\n<p>Modern control modules are complex and integrated with security and immobilizer systems. That&#8217;s why choosing a replacement isn\u2019t 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. Replacement units vary depending on production date and software version, so the correct module is matched by VIN before programming. This ensures seamless integration with your vehicle\u2019s communication network and eliminates dealer\u2011only programming delays.<\/p>\n<h2>Preventive Maintenance <\/h2>\n<ul>\n<li><strong>Regularly inspect engine\u2011bay wiring<\/strong> during scheduled service intervals. Look for signs of heat damage, abrasion, or moisture. <\/li>\n<li><strong>Keep the intake\u2011valve actuator area clean<\/strong>; oil or coolant leaks can accelerate corrosion of connectors. <\/li>\n<li><strong>Update ECM software<\/strong> at the manufacturer\u2019s recommended service milestones (often every 30,000 mi). <\/li>\n<li><strong>Use OEM\u2011spec electrical connectors<\/strong> when performing any repair. Improper pins can introduce resistance that mimics a high\u2011voltage condition. <\/li>\n<li><strong>Run a quick OBD\u2011II scan<\/strong> every 6 months. Early detection of P3404 before the MIL illuminates can prevent loss of fuel\u2011efficiency benefits.<\/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 power loss on your vehicle? P3404 = Cylinder 1 deactivation\/intake valve control circuit high\u2014fix it now to prevent engine damage.<\/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-518887","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>P3404 Code Symptoms, Causes, Diagnosis &amp; Repair Guide - Step-by-Step - 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-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P3404 Code Symptoms, Causes, Diagnosis &amp; Repair Guide - Step-by-Step - Flagship One Blog\" \/>\n<meta property=\"og:description\" content=\"Check engine light and power loss on your vehicle? P3404 = Cylinder 1 deactivation\/intake valve control circuit high\u2014fix it now to prevent engine damage.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.fs1inc.com\/blog\/dtc-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\/\" \/>\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=\"2025-12-11T07:29:04+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-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\\\/\"},\"author\":{\"name\":\"FlagshipOne\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#\\\/schema\\\/person\\\/a3cf463514bd03eb7656953ef8f75700\"},\"headline\":\"P3404 Code Symptoms, Causes, Diagnosis &#038; Repair Guide &#8211; Step-by-Step\",\"datePublished\":\"2025-12-11T07:29:04+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\\\/\"},\"wordCount\":1103,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\\\/#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-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\\\/\",\"url\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\\\/\",\"name\":\"P3404 Code Symptoms, Causes, Diagnosis & Repair Guide - Step-by-Step - Flagship One Blog\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/fs1inc_logo2-scaled.jpg\",\"datePublished\":\"2025-12-11T07:29:04+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\\\/#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-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"P3404 Code Symptoms, Causes, Diagnosis &#038; Repair Guide &#8211; Step-by-Step\"}]},{\"@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":"P3404 Code Symptoms, Causes, Diagnosis & Repair Guide - Step-by-Step - 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-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\/","og_locale":"en_US","og_type":"article","og_title":"P3404 Code Symptoms, Causes, Diagnosis & Repair Guide - Step-by-Step - Flagship One Blog","og_description":"Check engine light and power loss on your vehicle? P3404 = Cylinder 1 deactivation\/intake valve control circuit high\u2014fix it now to prevent engine damage.","og_url":"https:\/\/www.fs1inc.com\/blog\/dtc-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\/","og_site_name":"Flagship One Blog","article_publisher":"https:\/\/www.facebook.com\/flagshipone","article_author":"https:\/\/www.facebook.com\/flagshipone\/","article_published_time":"2025-12-11T07:29:04+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-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\/#article","isPartOf":{"@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\/"},"author":{"name":"FlagshipOne","@id":"https:\/\/www.fs1inc.com\/blog\/#\/schema\/person\/a3cf463514bd03eb7656953ef8f75700"},"headline":"P3404 Code Symptoms, Causes, Diagnosis &#038; Repair Guide &#8211; Step-by-Step","datePublished":"2025-12-11T07:29:04+00:00","mainEntityOfPage":{"@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\/"},"wordCount":1103,"commentCount":0,"publisher":{"@id":"https:\/\/www.fs1inc.com\/blog\/#organization"},"image":{"@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\/#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-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\/","url":"https:\/\/www.fs1inc.com\/blog\/dtc-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\/","name":"P3404 Code Symptoms, Causes, Diagnosis & Repair Guide - Step-by-Step - Flagship One Blog","isPartOf":{"@id":"https:\/\/www.fs1inc.com\/blog\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\/#primaryimage"},"image":{"@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\/#primaryimage"},"thumbnailUrl":"https:\/\/www.fs1inc.com\/blog\/wp-content\/uploads\/2025\/12\/fs1inc_logo2-scaled.jpg","datePublished":"2025-12-11T07:29:04+00:00","breadcrumb":{"@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.fs1inc.com\/blog\/dtc-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\/#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-p3404-cylinder-1-deactivationintake-valve-control-circuit-high\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.fs1inc.com\/blog\/"},{"@type":"ListItem","position":2,"name":"P3404 Code Symptoms, Causes, Diagnosis &#038; Repair Guide &#8211; Step-by-Step"}]},{"@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\/518887","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=518887"}],"version-history":[{"count":0,"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/posts\/518887\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/media?parent=518887"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/categories?post=518887"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/tags?post=518887"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}