I have a 2001 FXDXT the engine light came on Friday morning, at the speed of 78 mph, slow down it went off.Temper out side was 35, don't have a gauge on bike. Im using Mobil 1 fully synthetic. WHY ?!?

 

Is this bike carbed or the early Delphi injection system? If carbed I would suspect the ignition module since it won't have an Engine Control Module (ECM). I don't think the coil is tied to the ignition module about the only things that are tied to ignition module is crank position sensor (CKP) and manifold absolute pressure sensor. I always thought if the CKP fails your engine will starting running real erratic (missing), since that didn't happen I would check the MAP sensor, read the codes that were tripped by the engine light, that will help also. Good luck

 

Thanks, the bike has a carburetor.

 

The crank position sensor went on my Dyna (carbed) and wouldn't run at all.