The rear oxygen sensor on your 2001 Nissan Frontier monitors Catalytic
Converter efficiency. So the problem could actually be the CAT or the rear oxygen sensor. Prior to replacing the Cat the rear sensor needs to be inspected.
Car OBD Codes, OBD-II Codes, Error Codes
The rear oxygen sensor on your 2001 Nissan Frontier monitors Catalytic
Converter efficiency. So the problem could actually be the CAT or the rear oxygen sensor. Prior to replacing the Cat the rear sensor needs to be inspected.