I just got my equinox about a month ago and yesterday was my first time driving it in the snow ( about a foot of slushy snowy garbage on the road ) . It did great. Had to work pretty hard getting up a hill near my house and ever since then the engine light came on and hasn't gone off. My wife drove it this morning and said it drove fine. Any suggestions?

Thanks

 

get the codes read and post them here.

 

if your gas cap isn't on tight, get a code check on the OBD or a possible vacuum leak