new quirk with my car. when i start it and it is kind of cold outside, the check engine light comes on and stays on for about 15 minutes. I also noticed that when this happens the radiator fans are on full blast. does this sound like bad o2 sensors? I dont think it is fan relays because the car seems to run like *** and miss abit untill it warms up and the check engine light shuts off.

 

That problem is not caused by a bad O2 sensor.

Check your ecu codes.