Do you happen to know the voltage that is running to the heater circuit to the very last o2 sensorstrange question....why do you need to know? with decent diagnostic equipment, you can read o2 voltage from the obdII port in real time. I wouldn't go probing in the ecu...nothing good can come from it.
The O2 sensor heater voltage doesn't come from the ECU, it is a direct connection to Fuse #29 or #34.does anyone know how to find out which wire going into the ecu is for the o2 sensor voltage?:crazy: