u/Figuringitoutdad

[supprimé]

Hey all, running into some issues with my 2003 Econoline e150. Getting P0174 System Too Lean (Bank 2) and P0172- System Too Rich (Bank 1). Replaced PCV hose, 2 oxygen sensors in rear, did smoke test and no leaks. Mechanic shop said I should replace MAF sensor and were ready to but they also said they weren't sure if that was the issue (and i'd had a mechanic test the sensor and he said it was getting proper voltage and working fine). Anything anyone's seen before and may be able to point me in the right direction?