O2 Sensor Heater Monitor

The vehicle will need to be driven for a period of time at highway speeds to satisfy the enabling conditions for the O2 Sensor Heater Monitor. The monitor runs with the ignition key off after vehicle operation. Allow the vehicle to hot soak for a few minutes before checking to determine if the monitor completed the cycle. Turning the key on prematurely will abort the monitor test and the vehicle will have to be driven to arm the enabling conditions again.