Detroit DD15 EPA07 (2007-09) Fault Code: SPN 904 FMI 13 (CPC) Front Axle Speed Signal is Missing
NOTE: Front axle speed signal is missing.
NOTE: If codes 168-0, 168-14, or 168-18 active fix those first.
PROBABLE CAUSE:
1. CPC has improper programming.
2. There is another computer on the vehicle (ABS, Transmission, Cab, etc…) that is causing the problems.
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