angerthis Posted November 8, 2014 Share Posted November 8, 2014 Ok just the other day my girlfriends 91 legacy check engine light came on its telling me code number 41 I looked it up and its telling me its an AF learning control what exactly does that mean is my ecu no good or what or is this another sensor that I'm just not aware of Link to comment Share on other sites More sharing options...
lmdew Posted November 8, 2014 Share Posted November 8, 2014 41 Air/fuel adaptive control I'd clear it and see if it comes back. Link to comment Share on other sites More sharing options...
angerthis Posted November 9, 2014 Author Share Posted November 9, 2014 I did that it stays off for awhile comes back on other times the check engine light turns itself off So where is that part located that sending unit Link to comment Share on other sites More sharing options...
angerthis Posted November 11, 2014 Author Share Posted November 11, 2014 So what is air fuel adaptive control? That code keeps coming up # 41 And then it goes away The damn check engine light can't make up its mind If it wants to stay on or turn off Link to comment Share on other sites More sharing options...
1 Lucky Texan Posted November 11, 2014 Share Posted November 11, 2014 (edited) if the car has a MAF - try cleaning it? Be careful, MAFs have some delicate wires inside. Might want to try a vacuum gauge on the car - just to confirm there's no massive vac leak. Edited November 11, 2014 by 1 Lucky Texan Link to comment Share on other sites More sharing options...
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