Accelerator pedal sensor
â–¶ How to fix
Check the control unit cable harness.Contact an Allison dealer.
What you'll see
No driver-visible symptom recorded.
System reaction
The Allison fault code number is: P0122.The fault code can only be set if the engine speed is greater than 200 rpm. The fault code is cleared automatically, when the vehicle has completed 40 start-up cycles without the fault being detected again.
Diagnostic depth
Detection
Voltage to accelerator pedal sensor is too low.
Possible cause
The control unit has detected that the voltage to the accelerator pedal sensor has been lower than 0.55 V for more than 5 seconds.