DTC P0257-11: Injection Pump Fuel Metering Control B Range/Performance - Circuit short to ground: Action
NOTE:
Monitor description.
To diagnose an internal serial peripheral interface communication failure between the main central processing unit and the pump control module
- Check engine control module for additional DTCs and refer to the relevant DTC index. Rectify these first
- Clear the DTCs and retest
- Check and install new engine control module as required