Code Enable Criteria

Conditions for running DTC:

• Engine is running.

Conditions for setting DTC:

• HO2S heater current is greater than 5.3 amps or less than 0.15 amp when heater is on.
• HO2S heater voltage is greater than 13.8 volts or less than 8.7 volts when heater is on.
• HO2S heater voltage is 6 volts with heater off.
• One of the above condition is present for 3 seconds.