DTC P0446: EVAP System Vent Control Circuit Malfunction: Condition
WARNING: This page is about a different car, the 2002 Suzuki Esteem. However, it is still accessible from the selected car via links, so may be relevant.
DTC sets when fuel tank internal pressure is lower than specified for a specified period of time. MIL is illuminated when ECM detects malfunction during 2 consecutive drive cycles. Possible causes are:
- EVAP canister vent valve malfunction.
- EVAP canister clogged.
- Vacuum hose vent passage clogged.
- EVAP canister vent valve circuit malfunction.
- Fuel tank pressure sensor malfunction.
- ECM malfunction.