Wiring diagram...
P0171 Fuel Trim System Lean bank 1-B
Ive come to the conclusion that its time to replace the wires from the 02 sensor to the ecu.. I really can't think of anything else.. After swapping the 02 sensor wires in the front, and watching the problem follow, Im pretty certain that its a bad line, and not mechanical..
I was just wondering if anyone had a wiring diagram that I could check out..





