Hello everyone - new user!
I have a 1996 F150, I6 4.9L, 2wd.
For the past....couple of years....my check engine light has been on and no matter what I do, it has stayed on. It may clear for a few hours, or a day, but always comes back.
The code is P0174 or P0171 lean bank 1 or 2. I have replaced the following: All 3 O2 sensors, MAF sensor, Fuel pressure regulator, and the fuel filter.
Does anyone have any suggestions on what else it could be?