panteramatt
Well-Known Member
- Joined
- February 28, 2003
- Messages
- 114
- Reaction score
- 0
- City, State
- south jersey
- Year, Model & Trim Level
- 07 Mountaineer V8
Had my wifes 97 explorers computer ran since its had a check engine light and it came back as p0420, catalyst efficiency below threshold bank 1. Does this mean the cats are bad or the o2 sensor? Which ones are they? Any fixes?