DTC P1031: Fuel High-Pressure Sensor Stuck At Engine Start: Notes

Diagnostic information - DME (DFI) control unit 

INFORMATION 

• Faults in the fuel high-pressure injection system area are frequently caused by defects in the pre-delivery circuit (fuel low pressure).
• Therefore, the pre-delivery circuit must be checked first in case of problems in the area of the fuel high-pressure injection system.