I have a 98 ranger, 2wd, v6 3 ltr, Vin -U. I've replaced the thermostat, egr, ecg, 2 o2 censers and some fuses. The only check engine code coming up is P0401.
My exhaust does smell rotten but I have several catalytic converters. The code doesn't narrow it down for me. Is there any other, less...