Windstar 96 error code P0141
Ford Windstar 96,3.8l, and check engine light on.
-The error code was P0141
-I changed the oxigen sensor downstream (after cat converter )#12
but I did not erase the error code.
The error codes needs to be erase after we changed the problem? (in this case the sensor) or they have to be erased by itself, because after four days the check engine light came off.
If we need to erase the code why the check engine going off?