P1027

P1027

Diagnosis information - Control unit DME (DFI)

Fuel high-pressure fluctuates

Diagnostic conditions
- Engine speed 450 ... 4,000 1/min
- Engine temperature -10 ... +100 °C (°F)
- Trip with different operating conditions

Possible fault causes
- Loose contact or corrosion on connectors or lines - Fuel high-pressure sensor
- Quantity control valve stiff (in Fuel high-pressure pump)

Fault setting condition(s)
- The fuel high pressure fluctuates by +/- 25 bar from the setpoint fuel pressure.