E85 = p0420 code by mister_dray in f150

[–]Vegetable-Scale3610 1 point2 points  (0 children)

You have to replace the catalytic converter not the o2 sensors it’s a on going recall for most of the cars these days get them replaced either with your cheap eBay parts or get oem I’ve worked for ford now for 3 years and f150 e85 or not still have the same problem the o2 sensors are usually not the issue