Originally Posted by Y2KJag

There may be some mistake. The comprehensive is NOT required for CA smog. Mine passed smog recently with the EVAP not set and the Comprehensive thing not set. Look at the following from the BAR's own web site. Maybe have a chat with the smog shop?

3 The misfire, fuel, and comprehensive component continuous monitors are ignored during an OBD test on "gas" vehicles.
https://www.bar.ca.gov/industry/obd-test-reference

Originally Posted by Jon89

Here is how I successfully clear the Comprehensive Component monitor:

- Fuel level must be between 30% and 85% in the tank.
- Start engine from cold, idle engine for more than 12 minutes 45 seconds.
- Drive away and maintain a road speed between 8mph and 80mph for 50 seconds.
- Idle engine for at least 66 seconds.

This process always works for my wife's 2006 XK8 once the Comprehensive Component monitor is the only one remaining to be cleared ....