Monitoring the Aftertreatment System

A Check Engine Indicator or mileage/time intervals indicate when ash cleaning is required. Use DETROIT Diesel Corporation's authorized DPF cleaning procedure. Failure to follow this procedure could result in engine and/or aftertreatment damage, causing degraded vehicle performance including excess fuel consumption and decreased engine life. Estimated intervals shown are documented in following section; Preventive Maintenance Intervals.

Periodically the accumulated ash derived from the engine's lubricating oil needs to be removed from the ATS. This ash does not oxidize in the filter during the regeneration process and must be removed through a cleaning procedure.