OK, here's the deal, finally broke down and played the guessing game and bought a new O2 sensor, guess I got the wrong one since I still get a damn 21 too. The 31 says some kind of Evap canister...I'm guessing that would be the big cylinder like thing in the passenger side fender well kinda yes/no?? If so how do I empty the damn thing or would it be less hassle to just buy a new sensor?? I didn't start getting the 31 til I swapped out the front O2 sensor...any relation to the 2???? all help and comments very welcome...

AEM CAI
Pace Setter
Magnacore 8.5 MM Plug wires
EBC Green Stuff pads
Waiting on AEM Cam Gears to arrive
ddudas@wakul.com
ICQ# 5591657