If you're a personal user, knowing how to read and interpret OBD codes is a trick that's well worth having up your sleeve for those times when the Check Engine light in your car suddenly comes on ...

When the check engine light comes on, a code is also set in the vehicle computer. This code can be read by an on-board diagnostic (OBD) scan tool. Many auto parts stores offer free OBD code checks ...

You Can Find Out What Your ‘Check Engine’ Light Means for Free Sure, you could take it to a mechanic—but there's a quicker way, and it's free.

Help with your Honda Check-engine light aka MIL, CEL and idiot light. How to read codes, understand what they mean and how to erase them. - Honda Tuning Magazine ...

Replace the intake manifold gasket/O-rings, and the check-engine light will go out. Read more on Boston.com.