- Joined
- Aug 6, 2007
- Messages
- 6,937
- Points
- 3,101
- Age
- 39
- City
- Westport, WA
- Vehicle Year
- 1993
- Transmission
- Manual
the post-cat O2 sensor is a cat efficiency monitor, im not sure what failure mode the PCM goes into if that sensor is picking up no cat...but it cant be good.