Code Enable Criteria

• Mass Airflow (MAF) is between 10-30 grams/second (except Park Avenue).
• MAF is between 8-35 grams/second (Park Avenue).
• Engine Coolant Temperature (ECT) is more than 122°F (50°C) (except Park Avenue).
• ECT is more than 167°F (70°C) (Park Avenue).
• Engine run time is more than 60 seconds.
• Engine speed is 1000-3000 RPM.
• Engine is running in closed loop.
• DTCs P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0128, P0201, P0202, P0203, P0204, P0205, P0206, P0300, P0410, P0440, P0442, P0443, P0446, P0449, or P1441 are not set.

DTC sets when PCM monitors fewer than 40 rich-to-lean and fewer than 40 lean-to-rich switches for HO2S 1 for a 100-second monitoring period.