I'm only pulling two codes off the scanner. P0171, "Lean condition Bank 1" and P0174, "Lean condition Bank 2". I'm pretty sure the pre-cats aren't involved since P0171 and P0174 mainly use the forward O2 sensors. If the pre-cats were involved I'd think I'd get a code like P0420, Catalyst efficiency below threshold Bank 1. Anyone else agree my precats may be influencing these DTCs?
