October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Catalyst Monitor

The vehicle will need to be driven at a steady highway speed for a few minutes. The monitor will typically enable and start running around 45 to 60 mph under normal driving conditions. If the vehicle is equipped with a manual transmission, using 4th gear may assist in meeting the monitor running criteria.