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