P053F

P053F

Diagnosis information - Control unit DME (DFI)

Fuel high-pressure to Cold start

INFORMATION
- Faults in the fuel high-pressure injection system are often caused by defects in the pre-delivery system (fuel low pressure).
- Therefore, if there are problems in the fuel high-pressure injection area, the predelivery circuit must be checked first.

Diagnostic conditions
- Engine start (Cold start + Catalytic converter heating measure)
- Engine temperature more than -10 °C (°F)
- Engine running more than 5 Second(s)

Possible fault causes
- Pre-delivery quantity or pressure in fuel low-pressure circuit too low
- Quantity control valve Faulty (in Fuel high-pressure pump)
- Fuel high-pressure pump Faulty

Fault setting condition(s)
- Deviation Fuel high-pressure more than 20% (Actual value - Nominal value), at:
- Catalytic converter heating measure