ME9 / P0455 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Fault indicator lamp (for further information see WIS Fault diagnosis, general)
Possible smell of petrol.
EVAP. Serious Leakage in System.
Fault symptom
Fault indicator lamp (for further information see WIS Fault diagnosis, general)
Possible smell of petrol.
On-board diagnosis
Type of diagnosis:
Enable criteria:
| Battery voltage should be between 10.7 and 18 Volts. |
| Coolant temperature upon start between 3.8 °C and 35.3 °C. |
| Ambient temperature is between -9.8 °C and 45 °C. |
| Ambient temperature max. 10 degrees Celsius higher than coolant temperature upon start. |
| The atmospheric pressure change over 200 s must be no greater than 25 kPa. |
| Tank pressure upon start is between -1800 Pa and 1000 Pa. |
| The fuel level is between 15% and 85%. |
| Vehicle speed below 3 km/h. |
| Engine running for more than 1000 s or 300 s if fuel adaptation has been performed. |
| Purge valve active for 25 s and then shut off for 20 s. |
| The pressure quotient between boost pressure and atmospheric pressure is lower than 0.6. |
| NONE of the following DTCs must be detected: |
| • | P0130, P0131, P0132, P0133, P0135 |
| • | P0137, P0138, P0140, P0141 |
| • | P2122, P2123, P2127, P2128, P2138 |
| • | P2187, P2188, P2191, P2192, P2195, P2196 |
| • | P2237, P2238, P2239, P2243, P2251, P2281 |
| • | The diagnosis is performed by closing the shut-off valve and opening the evap canister purge valve while the tank pressure is being registered. The pressure should then drop. |
| • | Bleeder valve closed; pressure increase in Pa/s calculated. Pressure must not rise too much. |
Fault criteria:
| The pressure does not fall by 525 Pa or the time required to reach the required pressure change is too long. |
Diagnostic help
Diagnosis regards:
| Blockage in suction line to evap canister purge valve or a detached hose can cause this DTC. |
| An improperly screwed fuel cap is often the reason this diagnostic trouble code is generated. Before beginning fault diagnosis, check that the tank cap is properly fitted. |
Functions in the diagnostic tool related to the fault:
| (See also description of readings/activations in diagnostic tool) |
