Is the P501 a code you received from your truck? If so, the P0501 code is the following...
DTC Code: P0501 Description: Vehicle Speed Sensor A Range/Performance Probable Causes:
DTC Code: P0501 Description: Vehicle Speed Sensor A Range/Performance Probable Causes:
- Sensor or solenoid faulty
- Connector terminal contact is damaged or corroded
- Wire harness - Check harness for correct voltage, open, short to ground or short to voltage
- Update control unit software - Check for the latest control unit update
- Powertrain or Engine Control Module faulty