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Driving Pattern

  1. Start the engine. Hold the engine speed at 3,000 rpm without load (in P or N) until the radiator fan comes on.
  2. Drive at a steady speed between 15 - 75 mph (24 - 120 km/h) for at least 15 minutes, and watch the long term fuel trim. If the long term fuel trim stays at about 1.0, the vehicle is OK or it is a very minor problem. If a significant fault is still present, the long term fuel trim will move up or down while driving.
    • When freeze data is stored, drive the vehicle under those conditions instead of Driving Pattern step  2.
    • After clearing the DTC by disconnecting the battery or using the scan tool, extend Driving Pattern step  2 to 40 minutes or longer to allow time for long term fuel trim to recover.
    • Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.
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