CKOTuHA

iTrader: (11)

Code 0215 is P1446 "EVAP canister vent control valve closed", could that be my problem in my car not starting right. My RPMs act very weird. They jump up and down really fast after barelly pushing on the gas or just letting of the gas pedal. A couple of times I've seen them delaying a little bit, when I push gas, the needle won't move for a couple of seconds. I have an automatic if it helps. Another code that i have is 0304, which is a knocking sensor. I've read that its not what causing my problem.
Search didn't help me out at all.
What that code actually means? WHat should I do? I'm running out of ideas.