Why Your Check Engine Light Might Keep Coming Back After Being Cleared

The Check Engine Light (CEL) happens when there is an issue. If you clear it manually, it may keep returning until the ...
AutoGuide

Are You Making This Costly Mistake with Your Car's Fuel Efficiency?

We earn commissions from purchases you make using links in our articles. Learn more. If your car experiences poor fuel economy, lacks power, feels sluggish, idles rough, or has an illuminated check ...
Hot Rod

OBD II: Understanding Some of the Technology to Meet OBD II Standards

In the January issue, we discussed the history of OBD. This time we are going to investigate some of the technology required to meet OBD II standards. To give an idea of the magnitude of technological ...
The Family Handyman on MSN

What Do Car Trouble Codes Really Mean?

Your vehicle has a problem if the check engine light (CEL) glows. Diagnostic trouble codes (DTCs) stored in the computer help find the cause.