Ford Escape, C-MAX, Mercury Mariner Forum
I have a 2007 ford escape XLT that has code po171 (air to fuel ratio is too lean) and code p2270 (o2 sensor signal biased/stuck lean (bank 1, sensor 2)). my fuel pressure is at 6 psi with key on engine off and 29 psi while running. I have seen people saying it needs 55psi and people saying other...