Code Enable Criteria

• Vehicle is in a decel (MAP less than 30 kPa).
• Engine run time is more than 200 seconds.
• ECT is 41-239°F (5-115°C).
• IAT is more than 32°F (0°C).
• TP angle change is less than 5 percent.
• STFT is 119-133.
• Ignition voltage is more than 11.7 volts.
• Engine speed is more than 1150 RPM (A/T), 1000 RPM (M/T).
• Airflow is less than 127 grams per second.
• Commanded air/fuel ratio is fixed at 8 percent (13.5:1)
• Loop status is closed.
• No O2S1 DTCs are set.

DTC sets when AIR system is commanded on and O2S1 voltage is more than 50 millivolts (not sufficiently indicating lean) for 3, 3 second tests.