the o2 sensor heater is a wire on the o2 sensor, replace ur o2 sensor, but I suggest you first check the sensor to see if there's a faulty connection, you'll probably have to replace the sensor though cuz there's hardly ever a faulty connection with the wires, and it's not cheap for the OEM one. The OEM one runs about 180-200 over here in my area, not sure how much it will be for you, try callin naples acura over there in florida, i forget the name of the parts dep. guy but he's got real good prices.