Code Enable Criteria

Conditions for running DTC:

• Barometric pressure is greater than 75 kPa.
• Engine coolant temperature is 18-230°F (-8 to 110°C).
• Intake air temperature is greater than 18°F (-8°C).
• Engine operating in closed-loop.

Conditions for setting DTC:

• High and low voltage swing of catalyst monitor HO2S is similar to high and low voltage swing of fuel control HO2S for 96 seconds.