Originally Posted by racerdave
Also why does it say Heater circuit malfunction? Could that be the problem and not my Oxygen sensor? Cuz I did buy a used blower motor a few weeks ago cuz mine went out again..
Your O2 sensor has a heater circuit. You can test to see if it's the sensor for sure by getting another one from a friend or something and trying the one you KNOW works on your car. If the CEL goes away, it's definitely the sensor.
