Yes, you should. The more informed you are of your vehicle's health, the better you'll be at keeping your vehicle in top condition.
"More than ever, vehicles on the road today are a combination of chips and computers. When things go wrong, as they eventually will, it’s not so much a matter of wrenching on the machinery anymore. Even if it is the engine or a timing belt or a gasket, the check engine light may be getting triggered by something else tied to that part. If you’re not a mechanic, you may be completely flummoxed as to what is going on...."