I just had the downstream oxygen sensor changed on my 2003 Monte Carlo and was wondering if the check engine light would turn off by itself eventually?
Or do I have to unplug the battery?
|||No the light will not turn off right away. You can disconnect the negative terminal on the battery for 10-15mins, or take the car to an Autozon or Advance auto parts and they will reset the light for free.|||Not necessarily, you may have other problems that%26#039;s causing the engine light to stay on.|||you unhook the battery before you install it, wait awhile and hook the battery back up. that should clear the codes.|||Unplugging the battery rests the computer. Course I would have disconnected the battery before replacing the sensor.|||After you put in the new sensor, disconect the negative battery terminal for a few minutes then reconnect it. that will reset your check engine light. after about 90 or so miles, if your check engine light doesn%26#039;t come back on, you should be in the clear.|||It will turn itself off if that was the only thing making it go on. Usually after 25 closed-loop cycles on most vehicles.|||depending on what year you are talking about, it could but that would be on a pre 96 car. on the obd2 systems, it need to see 40 successful drive cycles before that light will go off on its own. unplugging the battery might not do it
