ME9 / P0446 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Fault indicator lamp (for further information see WIS Fault diagnosis, general)
EVAP Canister Close Valve, Stucked in Closed Posistion
Fault symptom
Fault indicator lamp (for further information see WIS Fault diagnosis, general)
On-board diagnosis
Type of diagnosis:
Enable criteria:
Battery voltage must be between 10 - 18 V. |
Tank pressure lower than -0.8kPa. |
Tightness diagnosis active (P0456). |
When these conditions are met, the valve opens. Afterwards, diagnostics checks if the tank pressure has risen to the desired level within a calibrated time period. |
Fault criteria:
Tank pressure does not increase when the valve opens. |
Dependent:
System reaction to a fault:
Fuel adaption is blocked and reset. |
Diagnostic help
Diagnosis regards:
Blockage of fresh air intake via shut-off valve to evaporative emission canister or from the evaporative emission canister to the tank. |
Functions in the diagnostic tool related to the fault:
(See also description of readings/activations in diagnostic tool) |