by aesc » Mon Sep 05, 2005 8:44 pm
Not necessarily, the o2 sensor only adjusts the mixture when idling or light load ie crusing. When moderate to heavy accelerating or decelerating etc, the ecu goes into closed loop which means that the input from the o2 sensor is not used.
If the plug fits then it should work fine. All narrow band sensors work on the same principle, providing the ecu with 0-1V based on lean-rich mixture so id say the one you have will work sweet. Its gotta be better than not having one at all
If your worried about getting the right one, why dont you go to pick-a-part or whatever it is and get one off a wrecked ae111
EX AE101 owner
2013 Ford Focus ST