P12A2

P12A2

Diagnostic information - DME V6 DFI

Fuel high pressure implausible

NOTE: The diagnostics detect a deviation in the fuel high pressure.

Diagnostic conditions
- Battery positive voltage 10 V ... 16 V
- Engine start detected > 5 sec.
- No fault codes P0193 or P0192

Possible fault causes

- Tank vent (TEV) mechanically faulty (does not close fully)
- Fuel high-pressure sensor faulty
- Fluctuating fuel high pressure, e.g. due to:
- Low-pressure fuel circuit
- Pressure relief valve
- Fuel high-pressure pump
- Injection valve