P0455

P0455

Diagnosis information - DME

Leakage in fuel tank system

Diagnostic conditions
- Vehicle speed = 0 km/h
- Engine speed = 0 rpm
- Correction factor, height > 0.73
- Coolant temperature upon starting the engine may be no more than 6.8 K above ambient temperature
- Coolant temperature when engine starts > 3.8 °C
- Period for which the engine needs to have been running before ignition is switched off > 20 minutes
- Ignition has been switched off for at least 10 seconds.
- Ambient temperature 4 ... 35.3 °C
- Active charcoal filter load < 3 for minor leak
- Fuel tank fuel level 10 ... 54 liters
- Battery positive voltage 11.02 ... 14.5 V
- No fuel tank filling
- No faults detected for ambient pressure sensor, coolant temperature sensor, vehicle speed sensor
- No output stage faults detected for DMTL pump motor, DMTL switch-over valves and tank vent
- No fault detected for tank vent (flow)
- The diagnostic conditions can also be established using the PIWIS Tester via the short test "tank leakage test". After the test has begun, the ignition must be switched off.

NOTE: In this context, please also observe the function description.

Possible fault causes
- Tank cap not closed correctly, leaking or missing
- Purge air line leaking
- Tank vent leaking
- DMTL (Tank Leakage Diagnostics Module) leaking
- Leakage in fuel tank system