Hey guys I don't post on here much, still trying to learn my way around and don't get much time.. But I need some help. I have an '06 AT with DC headers/Injen CAI/APEXi exhaust. Emissions light came on a while back, throwing code P1157 "Manufacturer control fuel air metering." Called the dealership and they said primary O2, So I replaced it with an NGK (NTK), cleared the code, even pulled the battery overnight, and it is still throwing the code... I really can't afford to take it into the dealership, anyone run into this problem before? Need to get it fixed ASAP, have to pass Cali emissions to renew my base stickers.. Any help is appreciated!!