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HO2S Monitor Code

NOTE: Do not turn ignition switch off.
NOTE: When negative battery cable is disconnected, all readiness codes are cleared.
NOTE: Ensure ambient temperature is 20-95°F (-7-35°C).
  1. Connect scan tool to DLC.
  2. Start engine and hold at 3000 RPM with no load (in park or neutral) until radiator fan comes on.
  3. Let engine idle for 5 seconds.
  4. Drive vehicle at steady speed between 50 and 62 MPH for about two minutes
  5. With A/T in "D5" position, M/T in 5th gear, decelerate from 62 MPH by completely releasing throttle for at least 5 seconds. If engine is stopped during this procedure, go to step  4 and repeat procedure.
  6. Check for readiness code with scan tool.