Controls and Operating
3-46
ALLISON 4TH GEN DIAGNOSTIC CODES
Fault Code Meaning of Code / Possible Cause of Fault
C1312 Retarder Request Sensor Failed Low
C1313 Retarder Request Sensor Failed High
P0122 Pedal Position Sensor Low Voltage
P0123 Pedal Position Sensor High Voltage
P0218 Transmission Fluid Over temperature
P0602 TCM Not Programmed
P0610 TCM Vehicle Options Error (Trans ID) Error
P0613 TCM Processor
P0614 Torque Control Mismatch (ECM/ TCM)
P0634 TCM Internal Temperature Too High
P063E Auto Configuration Throttle Input Not Present
P063F Auto Configuration Engine Coolant Temperature Input Not Present
P0658 Actuator Supply Voltage 1 (HSD1) Low
P0659 Actuator Supply Voltage 1 (HSD1) High
P0701 Transmission Control System Performance
P0702 Transmission Control System Electrical (Trans ID)
P0703 Brake Switch Circuit Malfunction
P0708 Transmission Range Sensor Circuit - High Input
P070C Transmission Fluid Level Sensor Circuit - Low Input
P070D Transmission Fluid Level Sensor Circuit - High Input
P0711 Transmission Fluid Temp. Sensor Circuit Performance
P0712 Transmission Fluid Temperature Sensor Circuit Low Input
P0713 Transmission Fluid Temperature Sensor Circuit High Input
P0716 Turbine Speed Sensor Circuit Performance
P0717 Turbine Speed Sensor Circuit No Signal
P0719 Brake Switch ABS Input Low
P071A RELS Input Failed On
P071D General Purpose Input Fault
P0721 Output Speed Sensor Circuit Performance
P0722 Output Speed Sensor Circuit No Signal
P0726 Engine Speed Input Circuit Performance
P0727 Engine Speed Input Circuit No Signal
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