P1031
P1031Diagnosis information - DME (DFI)
Fuel high-pressure sensor stuck at start
NOTE:
- Faults in the fuel high-pressure injection area are often caused by defects in the predelivery circuit (fuel low-pressure).
- Therefore, if there are problems in the fuel high-pressure injection area, the predelivery circuit must be checked first.
NOTE: Diagnosis detects that the fuel high pressure does not seem to change during engine starting.
Diagnostic conditions
- Battery positive voltage > 9 V
- Engine start
- Engine temperature -10 °C ... +100 °C (50 °F ... 212 °F)
Possible fault causes
- predelivery quantity or pressure in fuel low-pressure circuit too low
- Fuel high-pressure sensor faulty