Driving Pattern

Fig 1: Vehicle Speed Driving Pattern

Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on.
Drive the vehicle at a steady speed up to 25 mph (40 km/h), for at least 5 minutes.
Then, drive immediately at a steady speed between 26 - 81 mph (41 - 130 km/h) for at least 6.8 seconds.

If the EVAP monitor runs instead of the HO2S monitor, turn the engine off, then restart it, and the HO2S monitor will restart.
Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.