Originally Posted by Nostang
The code is for EVap canister solenoid. You probably only need to replace the solenoid to fix it. Probably better to post this in the Cali/west coast forums.
This, nothing to do with a gas cap. Measure ohms of the vent solenoid, the most likely problem. It will either be really low or open, a lot of times you can just look at them and they will be visually messed up by corrosion. If not that, it may have a broken wire close to the solenoid.