I recently changed both front O2 sensors because my ecu was throwing the codes for all 3. Now i've reset it a couple of times but it keeps coming back on as soon as I start the car. Weird thing is if I turn the key to the ACC position and leave it there for a bout 3-4 seconds before I turn it all the way to start the car, the engine light won't come on. What could this mean? thanks

 

What code is it throwing, O2's still? You might have a bad fuse. Check the fuse box for the fuse for your heated O2 sensor.

 

sometime it throws the 0505 ghost code and sometime it throws an O2 sensor code. i'll check the fuse box, thanks.