- Messages
- 1,460
- Reactions
- 939
- Points
- 162
- Location
- East Freetown, MA
- Vehicle
- 2020 Explorer ST, Silver Spruce Metalic
I got a check engine light so I pulled the code and it read P0420/$07ES which is "Catalyst System Efficiency Below Threshold (Bank 1)". I have the SPD downpipes which are only two years old. Could this just be an O2 sensor? I figure I would get a code for it if it was. I ran a live view and the O2 sensors are showing the same value on both sides. Kinda scratching my head here. I can't imagine the cat would have gone bad in two years!
