Allison WTEC II Fault Code: 13 PID: SPN: 12 FMI: ECU input voltage, low

Main code 13 indicates either a high or low input voltage. Low voltage is less than 8V.
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) Bad batteries
2)Faulty vehicle charging system
3) No battery-direct power and ground

Categories Allison, DTC TRUCKS, WTEC II Tags 12, 13, Allison, Code, ECU, Fault, FMI, II, Input, Low, PID, SPN, Voltage, WTEC

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