This Service Bulletin addresses the issue of a Diesel Particulate Filter (DPF) Status Light illuminating on Freightliner vehicles equipped with EPA07 engines. The bulletin covers a wide range of Freightliner models including the FLA COE, FLB COE, FLD Conventional, Business Class, FLC 112 Conventional, Century Class Conventional, Argosy COE, Cargo, Columbia, Coronado, Business Class M2, and Cascadia. The bulletin provides comprehensive guidance and troubleshooting steps for addressing the DPF status light issue, helping technicians diagnose and resolve the underlying cause effectively. It outlines specific procedures for addressing various DPF-related concerns, such as regeneration issues, fault codes, and system performance.

The Diesel Particulate Filter (DPF) status light illuminates on various Freightliner truck models equipped with EPA07 engines, including the FLA COE, FLB COE, FLD Conventional, Business Class, FLC 112 Conventional, Century Class Conventional, Argosy COE, Cargo, Columbia, Coronado, Business Class M2, and Cascadia. This warning light indicates a potential issue with the DPF system, a critical component designed to reduce harmful particulate matter emissions from the engine. The DPF traps soot and ash particles from exhaust gases, preventing them from being released into the atmosphere. When the DPF becomes clogged with these particles, it triggers the status light, signaling the need for regeneration or intervention. Regeneration is a process that burns off the accumulated soot and ash within the DPF, restoring its filtering capacity. This can be accomplished passively, using the engine's heat to oxidize the trapped particles, or actively, through forced regeneration initiated by the engine control module. However, if regeneration fails or the DPF becomes severely clogged, it can lead to reduced engine performance, increased fuel consumption, and potentially damage to the engine. Addressing the DPF status light promptly by diagnosing the issue and implementing appropriate solutions is crucial to ensure optimal vehicle performance, environmental compliance, and long-term engine health.