P1286

P1286

Diagnosis information - Control unit DME (DFI)

Speed deviation

Diagnostic conditions
- Switch on ignition or Engine start (Electric fuel pump activated)

Possible fault causes
- Supply voltage Fuel pump control unit too low
- Loose contact or corrosion on connectors or lines
- Fuel line leaks
- Fuel line Blocked
- Foreign bodies in Electric fuel pump
- Electric fuel pump stiff

Fault setting condition(s)
- Deviation rpm Electric fuel pump from Setpoint rpm, at:
- Supply voltage Fuel pump control unit < 12.5 V
- Fuel counter-pressure too high
- Fuel counter-pressure too low
- Electric fuel pump stiff

Fault effects
- The controller attempts to bring the fuel pump to the setpoint.