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Miscellaneous Information
DPF Ash Service Interval
Description:
Diesel Particulate Filters ( DPF) were added to all On-
Highway engines beginning with EPA’07 engine model
year. These fi lters captures particulate material in the
exhaust. After regeneration a small amount of ash
remains in the DPF. The ash builts up over time and
effects DPF and engine performance. To restore the DPF
and engine to maximum performance and fuel economy,
the ash must be removed from the DPF. Your local
authorized dealer can perform the ash removal service.
Recommendation:
C7, C9
175,000 miles
(280,000 km)
or
5,000 Hours
C13, C15
250,000 mile
(400, 000 km)
or
5,000 Hours
When the ash service is performed, the servicing dealer
must reset the Ash Service Reset parameter.
If the engine ECM has FEB09 (Heavy Duty) or newer
software, or MAR09 (Medium Duty) or newer software
the engine will log a diagnostic trouble code 3720-15 to
denote that the ash service is past due.