2007 Q7 EPC light
 

I have 2007 Audi Q7, this morning when I started the vehicle the EPC light came on as well as the check engine light. Car was running normal and after awhile of letting it warm up the EPC light went off, but check engine light stayed on. Had no issues driving it, no loss of power or anything. Not sure if its weather related... been -25 degrees (F) below here for the last couple days.

Any thoughts what could be triggering this??

Thanks