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 speed between 25 - 55 mph (40 - 88 km/h) for at least 5 minutes.
- Then, drive immediately at a steady speed between 55 - 75 mph (88 - 120 km/h) for at least 10 seconds.
- Decelerate with the throttle valve fully closed for at least 9 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.