{"id":847,"date":"2026-03-15T15:07:03","date_gmt":"2026-03-15T19:07:03","guid":{"rendered":"https:\/\/www.4roadservice.com\/resources\/?page_id=847"},"modified":"2026-03-15T15:07:05","modified_gmt":"2026-03-15T19:07:05","slug":"detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active","status":"publish","type":"page","link":"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\/","title":{"rendered":"Detroit Diesel SPN 4360 FMI 18 \u2013 Aftertreatment SCR Inducement Active (Meaning, Causes &amp; Fix)"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-fault-codes-dd13-dd15-dd16\/\">\u2190 Back to Detroit Diesel Fault Codes<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Detroit Diesel SPN 4360 FMI 18 indicates that the SCR inducement system has been activated on the engine. This code appears on DD13, DD15, and DD16 engines and is the ECM&#8217;s way of enforcing compliance with emissions requirements by progressively limiting engine performance when the SCR system has been operating outside acceptable parameters for an extended period.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Symptoms<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Check engine light on <\/li>\n\n\n\n<li>SCR and DEF warning lights illuminated <\/li>\n\n\n\n<li>Significant engine derate active <\/li>\n\n\n\n<li>Vehicle speed may be limited <\/li>\n\n\n\n<li>Multiple SCR and NOx related codes likely present <\/li>\n\n\n\n<li>Engine power noticeably reduced<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Cause<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">SCR inducement is triggered after the ECM has detected ongoing SCR system issues that have not been addressed within the allowed timeframe. Common causes include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Extended operation with low or empty DEF tank <\/li>\n\n\n\n<li>Prolonged SCR efficiency faults left unresolved <\/li>\n\n\n\n<li>Repeated DEF quality faults not corrected <\/li>\n\n\n\n<li>DEF dosing system failure over extended period <\/li>\n\n\n\n<li>Tampered or missing SCR components <\/li>\n\n\n\n<li>Accumulated fault counts exceeding ECM thresholds<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Can You Keep Driving?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The engine is already in an active derate condition with this fault. Vehicle speed and power will be significantly restricted. This fault will not resolve on its own and requires diagnosis and repair by a qualified diesel technician. Continued operation in this condition risks further aftertreatment damage.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Recommended Action<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This fault requires professional diagnosis as it indicates a history of unresolved SCR system issues rather than a single component failure. Have a technician perform a full aftertreatment system evaluation including DEF quality, dosing system, NOx sensors, and SCR catalyst condition. Simply clearing codes without repair will not resolve the inducement condition.<\/p>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1773601334951\"><strong class=\"schema-faq-question\">What does Detroit Diesel SPN 4360 FMI 18 mean?<\/strong> <p class=\"schema-faq-answer\">It means the ECM has activated the SCR inducement system after detecting prolonged SCR system non-compliance, resulting in a significant engine derate condition to enforce emissions requirements.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1773601337692\"><strong class=\"schema-faq-question\"><strong>What causes SPN 4360 FMI 18?<\/strong><\/strong> <p class=\"schema-faq-answer\">This fault is typically caused by extended operation with unresolved SCR system issues such as low DEF, poor DEF quality, or ongoing SCR efficiency faults that were not addressed within the ECM allowed timeframe.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1773601337300\"><strong class=\"schema-faq-question\">Can I keep driving with SPN 4360 FMI 18?<\/strong> <p class=\"schema-faq-answer\">The engine is already in active derate with this fault. Continued operation without repair will not improve the situation and risks further damage to the aftertreatment system.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1773601336901\"><strong class=\"schema-faq-question\">Will SPN 4360 FMI 18 cause a derate?<\/strong> <p class=\"schema-faq-answer\">Yes. SCR inducement is specifically designed to enforce a derate condition and will continue until the underlying SCR system issues are properly diagnosed and repaired.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1773601336445\"><strong class=\"schema-faq-question\">How do I clear SPN 4360 FMI 18?<\/strong> <p class=\"schema-faq-answer\">The underlying SCR system faults must be diagnosed and repaired by a qualified technician. Clearing codes without fixing the root cause will result in the inducement condition returning. A full aftertreatment system evaluation is required.<\/p> <\/div> <\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Related codes<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-520372-fmi-16\/\" type=\"link\" id=\"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-520372-fmi-16\/\">SPN 520372 FMI 16 <\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-520372-fmi-18-scr-efficiency-below-threshold-severe\/\" type=\"link\" id=\"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-520372-fmi-18-scr-efficiency-below-threshold-severe\/\">SPN 520372 FMI 18 <\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-4334-fmi-16-scr-conversion-efficiency-low\/\" type=\"link\" id=\"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-4334-fmi-16-scr-conversion-efficiency-low\/\">SPN 4334 FMI 16 <\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-3936-fmi-1-def-level-low\/\" type=\"link\" id=\"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-3936-fmi-1-def-level-low\/\">SPN 3936 FMI 1<\/a> <\/li>\n\n\n\n<li><a href=\"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-3509-fmi-16-def-concentration-out-of-range\/\">SPN 3509 FMI 16<\/a><\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<h2 class=\"wp-block-heading\">Need Immediate Help With This Fault Code?<\/h2>\n<\/div><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">If your engine is derating, losing power, or unable to complete regeneration, don\u2019t risk further damage or costly downtime.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Use 4RoadService to locate mobile truck repair, dealer diagnostics, or emergency roadside assistance near your location.<\/p>\n\n\n\n<div class=\"wp-block-buttons has-off-white-background-color has-background is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-fe48e5de wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.4roadservice.com\/truck-dealers\">Find Truck Repair Near Me<\/a><\/div>\n\n\n\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-text-align-center wp-element-button\" href=\"https:\/\/www.4roadservice.com\/truck-repair\">Find Mobile Road Service<\/a><\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Important Notice<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The information provided above is for general informational purposes only and should not replace official OEM service procedures. Always consult the manufacturer\u2019s service manual or a qualified diesel technician before performing repairs. Operating a vehicle with active fault codes may result in further damage.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u2190 Back to Detroit Diesel Fault Codes Detroit Diesel SPN 4360 FMI 18 indicates that the SCR inducement system has been activated on the engine. This code appears on DD13, DD15, and DD16 engines and is the ECM&#8217;s way of enforcing compliance with emissions requirements by progressively limiting engine performance when the SCR system has &hellip; <a href=\"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Detroit Diesel SPN 4360 FMI 18 \u2013 Aftertreatment SCR Inducement Active (Meaning, Causes &amp; Fix)<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-847","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>SPN 4360 FMI 18 - Aftertreatment SCR Inducement Active<\/title>\n<meta name=\"description\" content=\"Detroit Diesel SPN 4360 FMI 18 means the SCR inducement system is active. Learn symptoms, causes, derate risk and how to fix it.\" \/>\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.4roadservice.com\/resources\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SPN 4360 FMI 18 - Aftertreatment SCR Inducement Active\" \/>\n<meta property=\"og:description\" content=\"Detroit Diesel SPN 4360 FMI 18 means the SCR inducement system is active. Learn symptoms, causes, derate risk and how to fix it.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\/\" \/>\n<meta property=\"og:site_name\" content=\"4RoadService Resources\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/4roadservice\" \/>\n<meta property=\"article:modified_time\" content=\"2026-03-15T19:07:05+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.4roadservice.com\/resources\/wp-content\/uploads\/2015\/08\/logo-sidebar@2x.png\" \/>\n\t<meta property=\"og:image:width\" content=\"380\" \/>\n\t<meta property=\"og:image:height\" content=\"64\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@4RoadService\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":[\"WebPage\",\"FAQPage\"],\"@id\":\"https:\\\/\\\/www.4roadservice.com\\\/resources\\\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\\\/\",\"url\":\"https:\\\/\\\/www.4roadservice.com\\\/resources\\\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\\\/\",\"name\":\"SPN 4360 FMI 18 - Aftertreatment SCR Inducement Active\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.4roadservice.com\\\/resources\\\/#website\"},\"datePublished\":\"2026-03-15T19:07:03+00:00\",\"dateModified\":\"2026-03-15T19:07:05+00:00\",\"description\":\"Detroit Diesel SPN 4360 FMI 18 means the SCR inducement system is active. Learn symptoms, causes, derate risk and how to fix it.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.4roadservice.com\\\/resources\\\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\\\/#breadcrumb\"},\"mainEntity\":[{\"@id\":\"https:\\\/\\\/www.4roadservice.com\\\/resources\\\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\\\/#faq-question-1773601334951\"},{\"@id\":\"https:\\\/\\\/www.4roadservice.com\\\/resources\\\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\\\/#faq-question-1773601337692\"},{\"@id\":\"https:\\\/\\\/www.4roadservice.com\\\/resources\\\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\\\/#faq-question-1773601337300\"},{\"@id\":\"https:\\\/\\\/www.4roadservice.com\\\/resources\\\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\\\/#faq-question-1773601336901\"},{\"@id\":\"https:\\\/\\\/www.4roadservice.com\\\/resources\\\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\\\/#faq-question-1773601336445\"}],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.4roadservice.com\\\/resources\\\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.4roadservice.com\\\/resources\\\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.4roadservice.com\\\/resources\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Detroit Diesel SPN 4360 FMI 18 \u2013 Aftertreatment SCR Inducement Active (Meaning, Causes &amp; Fix)\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.4roadservice.com\\\/resources\\\/#website\",\"url\":\"https:\\\/\\\/www.4roadservice.com\\\/resources\\\/\",\"name\":\"4RoadService Resources\",\"description\":\"Tools, Repairs &amp; Resources for Truck Drivers\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.4roadservice.com\\\/resources\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.4roadservice.com\\\/resources\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.4roadservice.com\\\/resources\\\/#organization\",\"name\":\"4RoadService.com\",\"url\":\"https:\\\/\\\/www.4roadservice.com\\\/resources\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.4roadservice.com\\\/resources\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/blog.4roadservice.com\\\/wp-content\\\/uploads\\\/2015\\\/08\\\/logo-sidebar@2x.png\",\"contentUrl\":\"https:\\\/\\\/blog.4roadservice.com\\\/wp-content\\\/uploads\\\/2015\\\/08\\\/logo-sidebar@2x.png\",\"width\":380,\"height\":64,\"caption\":\"4RoadService.com\"},\"image\":{\"@id\":\"https:\\\/\\\/www.4roadservice.com\\\/resources\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/4roadservice\",\"https:\\\/\\\/x.com\\\/4RoadService\"]},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/www.4roadservice.com\\\/resources\\\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\\\/#faq-question-1773601334951\",\"position\":1,\"url\":\"https:\\\/\\\/www.4roadservice.com\\\/resources\\\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\\\/#faq-question-1773601334951\",\"name\":\"What does Detroit Diesel SPN 4360 FMI 18 mean?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It means the ECM has activated the SCR inducement system after detecting prolonged SCR system non-compliance, resulting in a significant engine derate condition to enforce emissions requirements.\",\"inLanguage\":\"en-US\"},\"inLanguage\":\"en-US\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/www.4roadservice.com\\\/resources\\\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\\\/#faq-question-1773601337692\",\"position\":2,\"url\":\"https:\\\/\\\/www.4roadservice.com\\\/resources\\\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\\\/#faq-question-1773601337692\",\"name\":\"What causes SPN 4360 FMI 18?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This fault is typically caused by extended operation with unresolved SCR system issues such as low DEF, poor DEF quality, or ongoing SCR efficiency faults that were not addressed within the ECM allowed timeframe.\",\"inLanguage\":\"en-US\"},\"inLanguage\":\"en-US\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/www.4roadservice.com\\\/resources\\\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\\\/#faq-question-1773601337300\",\"position\":3,\"url\":\"https:\\\/\\\/www.4roadservice.com\\\/resources\\\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\\\/#faq-question-1773601337300\",\"name\":\"Can I keep driving with SPN 4360 FMI 18?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The engine is already in active derate with this fault. Continued operation without repair will not improve the situation and risks further damage to the aftertreatment system.\",\"inLanguage\":\"en-US\"},\"inLanguage\":\"en-US\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/www.4roadservice.com\\\/resources\\\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\\\/#faq-question-1773601336901\",\"position\":4,\"url\":\"https:\\\/\\\/www.4roadservice.com\\\/resources\\\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\\\/#faq-question-1773601336901\",\"name\":\"Will SPN 4360 FMI 18 cause a derate?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. SCR inducement is specifically designed to enforce a derate condition and will continue until the underlying SCR system issues are properly diagnosed and repaired.\",\"inLanguage\":\"en-US\"},\"inLanguage\":\"en-US\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/www.4roadservice.com\\\/resources\\\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\\\/#faq-question-1773601336445\",\"position\":5,\"url\":\"https:\\\/\\\/www.4roadservice.com\\\/resources\\\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\\\/#faq-question-1773601336445\",\"name\":\"How do I clear SPN 4360 FMI 18?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The underlying SCR system faults must be diagnosed and repaired by a qualified technician. Clearing codes without fixing the root cause will result in the inducement condition returning. A full aftertreatment system evaluation is required.\",\"inLanguage\":\"en-US\"},\"inLanguage\":\"en-US\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"SPN 4360 FMI 18 - Aftertreatment SCR Inducement Active","description":"Detroit Diesel SPN 4360 FMI 18 means the SCR inducement system is active. Learn symptoms, causes, derate risk and how to fix it.","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.4roadservice.com\/resources\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\/","og_locale":"en_US","og_type":"article","og_title":"SPN 4360 FMI 18 - Aftertreatment SCR Inducement Active","og_description":"Detroit Diesel SPN 4360 FMI 18 means the SCR inducement system is active. Learn symptoms, causes, derate risk and how to fix it.","og_url":"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\/","og_site_name":"4RoadService Resources","article_publisher":"https:\/\/www.facebook.com\/4roadservice","article_modified_time":"2026-03-15T19:07:05+00:00","og_image":[{"width":380,"height":64,"url":"https:\/\/www.4roadservice.com\/resources\/wp-content\/uploads\/2015\/08\/logo-sidebar@2x.png","type":"image\/png"}],"twitter_card":"summary_large_image","twitter_site":"@4RoadService","twitter_misc":{"Est. reading time":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":["WebPage","FAQPage"],"@id":"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\/","url":"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\/","name":"SPN 4360 FMI 18 - Aftertreatment SCR Inducement Active","isPartOf":{"@id":"https:\/\/www.4roadservice.com\/resources\/#website"},"datePublished":"2026-03-15T19:07:03+00:00","dateModified":"2026-03-15T19:07:05+00:00","description":"Detroit Diesel SPN 4360 FMI 18 means the SCR inducement system is active. Learn symptoms, causes, derate risk and how to fix it.","breadcrumb":{"@id":"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\/#breadcrumb"},"mainEntity":[{"@id":"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\/#faq-question-1773601334951"},{"@id":"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\/#faq-question-1773601337692"},{"@id":"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\/#faq-question-1773601337300"},{"@id":"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\/#faq-question-1773601336901"},{"@id":"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\/#faq-question-1773601336445"}],"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.4roadservice.com\/resources\/"},{"@type":"ListItem","position":2,"name":"Detroit Diesel SPN 4360 FMI 18 \u2013 Aftertreatment SCR Inducement Active (Meaning, Causes &amp; Fix)"}]},{"@type":"WebSite","@id":"https:\/\/www.4roadservice.com\/resources\/#website","url":"https:\/\/www.4roadservice.com\/resources\/","name":"4RoadService Resources","description":"Tools, Repairs &amp; Resources for Truck Drivers","publisher":{"@id":"https:\/\/www.4roadservice.com\/resources\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.4roadservice.com\/resources\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.4roadservice.com\/resources\/#organization","name":"4RoadService.com","url":"https:\/\/www.4roadservice.com\/resources\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.4roadservice.com\/resources\/#\/schema\/logo\/image\/","url":"https:\/\/blog.4roadservice.com\/wp-content\/uploads\/2015\/08\/logo-sidebar@2x.png","contentUrl":"https:\/\/blog.4roadservice.com\/wp-content\/uploads\/2015\/08\/logo-sidebar@2x.png","width":380,"height":64,"caption":"4RoadService.com"},"image":{"@id":"https:\/\/www.4roadservice.com\/resources\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/4roadservice","https:\/\/x.com\/4RoadService"]},{"@type":"Question","@id":"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\/#faq-question-1773601334951","position":1,"url":"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\/#faq-question-1773601334951","name":"What does Detroit Diesel SPN 4360 FMI 18 mean?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"It means the ECM has activated the SCR inducement system after detecting prolonged SCR system non-compliance, resulting in a significant engine derate condition to enforce emissions requirements.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\/#faq-question-1773601337692","position":2,"url":"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\/#faq-question-1773601337692","name":"What causes SPN 4360 FMI 18?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"This fault is typically caused by extended operation with unresolved SCR system issues such as low DEF, poor DEF quality, or ongoing SCR efficiency faults that were not addressed within the ECM allowed timeframe.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\/#faq-question-1773601337300","position":3,"url":"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\/#faq-question-1773601337300","name":"Can I keep driving with SPN 4360 FMI 18?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"The engine is already in active derate with this fault. Continued operation without repair will not improve the situation and risks further damage to the aftertreatment system.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\/#faq-question-1773601336901","position":4,"url":"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\/#faq-question-1773601336901","name":"Will SPN 4360 FMI 18 cause a derate?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Yes. SCR inducement is specifically designed to enforce a derate condition and will continue until the underlying SCR system issues are properly diagnosed and repaired.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\/#faq-question-1773601336445","position":5,"url":"https:\/\/www.4roadservice.com\/resources\/detroit-diesel-spn-4360-fmi-18-aftertreatment-scr-inducement-active\/#faq-question-1773601336445","name":"How do I clear SPN 4360 FMI 18?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"The underlying SCR system faults must be diagnosed and repaired by a qualified technician. Clearing codes without fixing the root cause will result in the inducement condition returning. A full aftertreatment system evaluation is required.","inLanguage":"en-US"},"inLanguage":"en-US"}]}},"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/P6wicq-dF","_links":{"self":[{"href":"https:\/\/www.4roadservice.com\/resources\/wp-json\/wp\/v2\/pages\/847","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.4roadservice.com\/resources\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.4roadservice.com\/resources\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.4roadservice.com\/resources\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.4roadservice.com\/resources\/wp-json\/wp\/v2\/comments?post=847"}],"version-history":[{"count":5,"href":"https:\/\/www.4roadservice.com\/resources\/wp-json\/wp\/v2\/pages\/847\/revisions"}],"predecessor-version":[{"id":853,"href":"https:\/\/www.4roadservice.com\/resources\/wp-json\/wp\/v2\/pages\/847\/revisions\/853"}],"wp:attachment":[{"href":"https:\/\/www.4roadservice.com\/resources\/wp-json\/wp\/v2\/media?parent=847"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}