Enable Criteria

The following enable criteria is for HO2S bank 1 sensor 1, and bank 2 sensor 1.

• Engine speed is 500-3000 RPM.
• Engine run time is less than 3 minutes.
• Mass airflow is 4-30 grams/sec.
• Battery voltage is 9-18 volts.

The following enable criteria is for HO2S bank 1 sensor 2.

• Engine cold start is determined.
• Average mass airflow during warm-up is less than 30 grams/sec.
• Battery voltage is 10-18 volts.