i took my car in for check engine what could be wrong so soon with a car.

How old the vechicle is not the only factor. Type of driving (highway/city) and how many miles on the vechicle also matters. They recommend 5 years or 60,000 miles to replace timing belt and at 5 years or 78,000 miles for your spark plugs.

you are due to have this service any time now.