P1026

P1026

Diagnosis information - Control unit DME (DFI)

Fuel high-pressure implausible

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 pre-delivery circuit must be checked first.

Diagnostic conditions
- Period since engine was started more than 5 Second(s)
- Engine temperature -10 ... +100 °C (°F)
- Engine running / Driving

Possible fault causes (See Fault setting condition(s))
- Below limit;
- Pre-delivery quantity or pressure in fuel low-pressure circuit too low
- Fuel tank (driven) empty
--> Actual value more than Fuel Level Input less than [0%]

- Below limit or Limit exceeded;
- Quantity control valve Faulty (in Fuel high-pressure pump)
- Fuel high-pressure pump Faulty

Fault setting condition(s) (See INFORMATION)
- Below limit;
- Fuel high-pressure average permanent less than 10 bar

- Limit exceeded;
- Fuel high-pressure average permanent more than 150 bar

INFORMATION
--> Environmental condition 6 for first fault occurrence (Fuel high-pressure actual value)
--> Environmental condition 5 for first fault occurrence (Fuel high-pressure Nominal value)

Conversion:
- 10,000 hPa = 10 bar = 10,000 mbar
- 1000 kPa = 10 bar = 10,000 mbar
- 1MPa = 10 bar = 10,000 mbar