Originally posted by lowelcam96
There are procedures to confirm a catalytic efficiency failure by using a gas analyzer. You can try that.
The only sensor that reports to your computer of code 67 is the secondary(in the Cat) o2 sensor. You may need a new sensor.
Thank you for your reply
.
Any insight on O2 sensors! I know Bosch makes them but I hear they are pretty expensive! I should replace the sensors anyways; should help me get back some mpg.