P0174 2003 FORD WINDSTAR -

Question

i have a 2003 windstar with a system to lean code bank 2 p0174 i have already replaced the lower intake gaskets with the new ford tsb one i have replaced all O2 sensors i have checked an rechecked all vac lines pcv valve has been replaced i have performed a complete tune up an still no change got any ideas?

Answer 1

HI there,

It's possible there is an issue with the valves, so do a leak down test. If the valves have enough carbon build up on them to leave them open even the smallest amount it will report a lean condition. Also check the fuel pressure and the mass air flow sensor. I have seen the maf sensor cause the issue on one bank only. it's not common but it does happen.