PCS Main modulation solenoid, interference
â–¶ How to fix
Check the cable harness between gearbox and control unit. If no fault is found, contact an Allison dealer.
What you'll see
No driver-visible symptom recorded.
System reaction
The Allison fault code number is: P0960.The fault code is set when the control unit has detected an open circuit in the main modulation solenoid return circuit for more than 2 seconds.The fault code is cleared automatically, when the vehicle has completed 40 start-up cycles without the fault being detected again.
Diagnostic depth
Detection
Control unit has detected open circuit on the return circuit for the main modulation solenoid.
Possible cause
A possible cause of this fault code is an open circuit in the cable harness for the solenoid return circuit.