The dreaded Check Engine light . . . Want to fix it or avoid it all together? I will share some ideas here on how to deal with a Check Engine light in your vehicle.

First, let's dispel a myth . . . a Check Engine light is really about one thing-- emissions. It isn't telling you about major malfunctions-- it is more a state and federal government emissions thing. That said it shouldn't necessarily be ignored-- so what to do?

If it is on, go to your local auto parts place and they can run the code scanner on it. When they give you the codes, you may be able to pinpoint the issue, such as a misfire in cylinder 2. This could mean a bad spark plug, wire, or coil.

Here are some very common things to fix or avoid a Check Engine light:

• Perform a tune-up (Replace spark plugs and wires)-- about $50-100 DIY
• Replace the O2 Sensors (There are usually two: one upstream in the engine compartment and one downstream by the catalatic convertor under the car)-- about $50-80 each
• Change the PCV Valve (On the valve cover)-- about $6
• Get a new gas cap-- about $10

With the exception of the tune-up and the downstream O2 sensor (30 minutes to raise the vehicle, change the sensor, and lower the vehicle), these are 5-10 minute jobs with basic tools. However, the O2 sensors do require a bought (about $8) or loaned socket for easier removal.

These changes can improve your performance and gas mileage slightly as well.

As always, I highly recommend you become familiar with your owner's manual and strongly recommend getting the Haynes Auto Repair and Maintenance manual for your vehicle.