i just cleaned my air filter and put it back on. now i have the trouble code bank 2 o2 sensor out. after that i got a code p1157 saying my car is running lean. i checked for vaccume leakes on the intake and when i rev the motor i can hear it sucking but it has always done it.all the hoses and clamps are on right.i added slp loudmouth x pipe with cats and a cat back system about a month ago. i put it on so i know the o2 sensors were good. the car has bbk cold air intake,70mm throttle body,upper intake elbow, underdrive pulleys, and a diablosport tuner for power adders. any help would be great cause im lost on where to start. if my o2 sensor is out that wouldnt make it run lean would it? it should make itveryrich right? any help would be great thanks.

 

Code 1157 is a testing failure--the mix is forced rich and lean, and the PCM watches the sensor output for proper switching--of the bank 2 downstream (rear) sensor due to a wiring problem (corrsion, pinched, crossed), exhaust leak, or contaminated/damaged sensor.[/align][/align]Will thePredatorlet youshut off the rear sensors?[/align] [/align][/align]Here's a link to a list of the Pnnnn codes with diagnostic tips...[/align]