DTC P0446 EVAP. Emission System-Vent Control Circuit: DTC Detecting Condition
DTC DETECTING CONDITION AND POSSIBLE CAUSES
| Item |
Detecting Condition |
Possible Cause |
| DTC Strategy |
- Fuel tank pressure behavior (CCV stuck closed)
|
- Poor connection
- CCV
- ECM/PCM
|
| Enable Conditions |
- Time after engine start > 600sec.
- Idle speed controller activated
- Mixture adaptation activated
- Coolant temperature at start - ambient temperature < 6.6 °C (11.88°F)
- Ambient temperature: 4~35°C (39.2~95°F)
- Ambient pressure > 680hPa (10 lbf/in2
)
- Fuel level: 6.45~38.7 L (1.7~10.2 gal)
- Tank ventilation must be active > 10sec.
- No misfire
- Not much evaporation in the fuel tank
|
| Threshold Value |
- Fuel tank pressure does not go up to the ambient pressure, when the intrusive diagnosis activated
|
| Diagnostic Time |
|
| MIL ON Condition |
|