• Home

Reply To: O-2 Heater Monitor Won't Set.

David Erhahon
David Erhahon

On my 05 accord, the heater monitor sets even while idling. I don’t have to drive anywhere. It should be among the first things to set.
Most such O2 heater issues are usually due to electrical problems. Either faulty wiring or faulty heater in the sensor.

You will need a multimeter and your Hyundai wiring diagram to check it.