my car shows me 4 codes
PO171 system to lean (bank 1)
PO174 system to lean (bank 2)
P1000 OBD system readiness test not complete
P1260 theft detected, vehicle immobilized

can you guys help me out on how to fix this... thanks

 

Did you find these yourself with a tune? If so honestly the best thing to do is to call where you got the tuner from and tell them to research the codes, or just look them up... Thats what i do, i got mine from Brenspeed... infact they recommend i do that with codes.. but it sounds like o2 sensors are gone/bad, do you have o/r h or x pipe? lt headers?