P0456

P0456

Diagnosis information - DME (DFI)

Tank system leak

Diagnostic conditions
- Short test (for this, engine off and ignition on)

or
- Vehicle speed = 0 km/h
- Engine speed = 0 rpm
- Altitude correction factor more than 0.73
- When the engine is started, the coolant temperature may be only 6.8 °C (12.2 °F) above the ambient temperature
- Coolant temperature when engine starts more than 3.8 °C (38.8 °F)
- Time that the engine must have been running for before the ignition is switched off more than 20 minutes
- Ignition switched off for more than 10 seconds
- Ambient temperature 4 ... 35 °C (39.2 ... 95 °F)
- Carbon canister loading less than 3 for very fine leak
- Fuel level 10 ... 54 liters (85 %)
- Battery positive voltage 11 ... 14.5 V
- No refueling process
- No fault for ambient pressure sensor, coolant temperature sensor, vehicle speed sensor
- No driver fault for DMTL pump motor, DMTL change-over valves and tank vent
- No fault for tank vent (flow)

Possible fault causes
- Tank cap not closed correctly, leaking or missing
- Purge-air line leaking
- Tank vent leaking
- Tank leakage diagnosis module (DMTL) leaking
- Tank system leak