Catera V6-3.0L VIN R (1997)
Canister Vent Valve: Description and Operation
The EVAP Canister Vent Valve is used for certain EVAP system performance tests that are performed by the ECM. The ECM can close the vent which
effectively seals the system. The ECM can then evaluate pressure changes within the system by monitoring the Fuel Tank Pressure Sensor signal.