why is my service engine light on? on 2006 Ford Taurus

my service engine light came on on tuesday, had the dashboard diagnostic done on tuesday. said there was a random backfire. light went off and now is back on today. there is over 98 thousand miles on car

1 answer 2 comments
You probably mean misfire instead of backfire. It probably needs a tuneup?
WHAT IS THE PRICE RANGE OF TUNE-UPS? HOW LONG CAN SHOULD I GO BEFORE I GET THE TUNE-UP?
I would suggest having a tune-up done asap?