my question is on my 05 grand prix all these codes popped up one day like the o2 sensor and the throttle position sensor well i changed the o2 sensor and the throttle body cuz the tps is built into the throttle body but the throttle body was used. and like the car really lacks power like it wont rev up past 3500 rpm and if i try to drive it it stalls right out but most of all if i put it in neutral and hold the brake and try and gas it it has no power at all. so yea i was wondering if you had any idea what that could be or why?