DTC P0446 - EVAP System, Vent Cut Control Malfunction: Condition
DTC is set when PCM detects nominal difference in fuel tank pressures measured after Canister Drain Cut Valve (CDCV) is released and preset period of time has elapsed. Possible causes are:
- CDCV malfunction.
- Tank Pressure Control Valve (TPCV) malfunction.
- Charcoal canister malfunction.
- Clogged evap air filter.
- Two-way check valve clogged.
- Clogs or leakage in system hoses.
- Fuel level sensor malfunction.
- Fuel tank pressure sensor malfunction.
- Engine Coolant Temperature (ECT) sensor malfunction.
- Intake Air Temperature (IAT) sensor malfunction.
- Throttle Position (TP) sensor malfunction.
- Mass Air Flow (MAF) sensor malfunction.
- Vehicle Speed Sensor (VSS) malfunction.
NOTE:
New Generation Star (NGS) tester is necessary for following diagnosis and repair procedure.