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Detroit DD15 GHG14 (2014-16) Fault Code: SPN 191 FMI 19 (MCM) J1939 Transmission Output Speed Shaft Signal is Erratic

DESCRIPTION:
Transmission output shaft speed.

MONITORED PARAMETER:
CAN communication

TYPICAL ENABLING CONDITIONS:
Always enabled

MONITOR SEQUENCE:
None

EXECUTION FREQUENCY:
Always enabled

TYPICAL DURATION:
2

DASH LAMPS:
MIL

VERIFICATION:
Engine Idle: One minute.

PROBABLE CAUSES:
1. If battery fault codes present, fix this first.
2. If any programming done recently on the engine, it may be incorrect.
3. Check other computers on truck for failures (ABS, Transmission, cab controller, etc…)

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