Check Engine light came on

Q: I have a 2003 Ford Explorer. I noticed a few months ago my check engine light came on, but after a few days, it went off. Now, it has come back on and stayed on several weeks. What does this mean, and is it important? Do I have to take it back to the dealer?

A: The check engine light is a warning sign from your vehicle that “I need attention”! It is not necessary to return to the dealer. A reputable auto repair center with a diagnostic computer can communicate with your car to find out where the problem is occurring. A diagnostic computer connects directly to your vehicle’s computer and gives the technician a series of codes and definitions to the problem.  

After this information is discovered, your technician should be able to recommend a repair or service. The check engine light could signify a serious problem.
 
We recommend having your vehicle checked at the first sign of a warning light.  Any warning light should be investigated. A light never comes on that should be ignored.