DPF Ash Accumulation
•
The lighter ash is discharged through the exhaust
system; the heavier ash collects in the soot filter.
•
Ash is a residue of the regeneration process. Over
time, the diesel particulate filter accumulates ash
that does not discharge with the engine exhaust.
•
The computer for the engine calculates the amount
of ash accumulated in the DPF.
•
When enough ash accumulates, the engine
computer sends information to the InfoCenter in
the form of a system advisory or an engine fault to
indicate the accumulation of ash in the DPF.
•
The advisory and faults are indications that it is
time to service the DPF.
•
In addition to the warnings, the computer reduces
the power produced by the engine at different
ash-accumulation levels.
InfoCenter Advisory and Engine Warning Messages—Ash Accumulation
Indication
Level
Advisory or Fault Code
Engine Speed
Reduction
Engine Power Rating
Recommended Action
Level 1:
System
Advisory
g213865
Figure 39
Advisory #179
None
100%
Notify your service
department that advisory
#179 displays in the
InfoCenter.
Level 2:
Engine
Warning
g213863
Figure 40
Check Engine
SPN 3720, FMI 16
None
The computer
de-rates the engine
power to 85%
Service the DPF;
refer to
Level 3:
Engine
Warning
g213864
Figure 41
Check Engine
SPN 3720, FMI 0
None
The computer
de-rates the engine
power to 50%
Service the DPF;
refer to
Level 4:
Engine
Warning
g214715
Figure 42
Check Engine
SPN 3251, FMI 0
Engine speed at max
200 rpm
The computer
de-rates the engine
power to 50%
Service the DPF;
refer to
40
