E39 / P0446 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: CHECK ENGINE
EVAP Canister Close Valve, Stucked in Closed Posistion
Fault symptom
CHECK ENGINE
On-board diagnosis
Type of diagnosis:
Enable criteria:
| Battery voltage must be between 11 - 18 V. |
| Fuel level between 10% and 90%. |
| Engine temperature upon start is lower than 35 °C. |
| Intake air temperature between 4°C and 30°C. |
| 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) |
