Main code 13 indicates either a high or low input voltage. High voltage is over 35V.
In the event of a power loss, the transmission fails to the ranges indicated in the following, depending upon which latch valve releases ?rst
Possible causes:
1) Faulty vehicle alternator
2) Faulty vehicle voltage regulator
Allison WTEC II Fault Code: 13 PID: SPN: 13 FMI: ECU input voltage, medium low
Allison WTEC II Fault Code: 13 PID: SPN: 12 FMI: ECU input voltage, low
Detroit DD13 EPA07 (2007-09) Fault Code: SPN 5444 FMI 1 (MCM) Engine Crankcase Breather Oil Separator Speed Too Low
Detroit DD13 EPA07 (2007-09) Fault Code: SPN 4259 FMI 4 (MCM) Injector Amplifier Control Valve Cylinder 4, 5, 6 Shorted to Ground
Detroit DD13 EPA07 (2007-09) Fault Code: SPN 4259 FMI 3 (MCM) Fuel Injector # 4, 5 or 6 Amplifier Control Valve Circuit Has a Short to Battery/Power
Detroit DD13 EPA07 (2007-09) Fault Code: SPN 4258 FMI 4 (MCM) Injector Amplifier Control Valve Cylinder 1, 2, 3 Shorted to Ground
