Fault Condition: The Pedal Message code will set when the Engine Management System (EMS) Module has lost the Accelerator Pedal Sensor Signal from the Vehicle Electronic Control Unit (VECU).

Possible repairs:

1) Verify that code PID 91 is set. If code PID 91 is not set, wiggle the harness and connectors to try to set the code. Visually inspect the VECU connectors and wires for poor connections.
2) If code MID 144 PID 91 is set, repair code MID 144 PID 91 and retest the system. If only MID 128 PID 91 is set, the Vehicle Electronic Control Unit (VECU) may be faulty, call MACK Reliability Engineering.