Driving Pattern
- Start the engine. Hold the engine at 3,000 rpm with no load (in park or neutral) until the radiator fan comes on.
- Drive the vehicle at a steady speed between 25 - 55 mph (40 - 88 km/h) for at least 5 minutes.
- Then, drive immediately at a steady speed between 35 - 75 mph (56 - 120 km/h) for at least 14 seconds.
- If the EVAP monitor runs instead of the HO2S monitor, turn the engine off, then restart it, and the HO2S monitor will restart.
- If you have difficulty duplicating the DTC, retest after turning off electrical components such as the audio system and A/C, and try a different gear position.
- Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.