Which module? When I first took it into the FORD DEALER in Deland Fl they said the a module by the transmission and a short, which they repaired and the light was gone. Drove down the road, light (service) came back on, went back and now the Timing sencor, was bad. I called and asked, did they have any mechanics or just parts changers? I can live with it, or better the wife can, its her truck. I just know, the service light is back on also, which can be anything, I think Auto Zone will test for nothing, and tell what the code is for. We have 68 F100, 92 F150, 2001 F150 and new one 2001 F350. I can't complain about Fords, had other also. But since these new computer driven models, it hard to get a handle any more. Thanks for your help.