My 420 was cured with a Bosch over a month ago. I would not go to Ford

6 months of intermittent 420 CEL


My CAT seems to be fine and why not

A 10 minute easy job


1999 GREEN Contour SE SPORT Duratec V6, ATX, SUNROOF, 93,000 Miles, P0420 ON&OFF -replaced DS O2 --did not FIX *New TORQUE CONVERTER @ 53,000-Intermittent P1744 *New DASH at 53,000 and New DASH lifted-now using MOLLEY bolts to pull down