Engine Failsafe Prog alert, but no code found at dealer

[edco]

Happy New Year first of all..

I've done a search and read past posts on this topic but thought I'd throw one out there anyway..

Christmas morning jumped in the X and drove to mom-in-law. No problems.

Bout 11PM got in the car to come home and the subject message was on the dash. Looked in the manual and expected to have a "limp-home" mode, but she ran fine on the NJ Turnpike 65MPH, no sluggishness or stalling..business as usual.

12/26, started her up again - same message, but after about 2 minutes, light went out.

12/31 - start her up, no light, but dropped it off at Open Road BMW so they could check it. Called me back and said no codes found, no faults found.

1/1 - drove around all day - no problems.

Is there a gremlin somewhere or something I should be looking for, or is the X just having it's fun with me ?