I'd just see if the code comes back, Subaru's seem to be a bit eager to throw a code I find.
Quite often when I drove my old Bug hard the EML would come on and then clear, usually a trivial code, my car had 140+k miles on it and was still going fine.
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2002 Bugeye WRX Wagon - deceased
1995 555 STi v2 track build
1999 RB5
2003 Blobeye WRX SL Wagon
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