Beginning to See the Light (Check Engine Light Diagnostics)
September 8, 2025
It's a light many drivers fear they'll see turn on at the most inopportune time. It's the one on the dash that says "Check Engine," "Service Engine Soon," or it may be simply an engine-shaped light. Your first instinct may be to pull off to the side of the road and turn off the engine.
The truth is that Check Engine light can be pointing to problems as simple as a loose gas cap. But it could be as serious as a severely misfiring engine. Don't ignore it because it's there to help you avoid an expensive repair it is designed to alert you to, to tell you something's not quite right.
Your vehicle has a connected system of computers and sensors constantly checking to see that all systems are working the way they should. If something isn't, the system will turn on the Check Engine light.
If it's flashing, that could be serious. Look at some of the other warning lights or gauges such as heat or oil pressure. They could be telling you your vehicle's problem should be checked right away. In that case, if you can, safely pull off the road and shut the vehicle down. If your vehicle loses power and the Check Engine light is on, try not to push the demands you are making on the engine, such as towing or accelerating hard.
Simply put, a flashing Check Engine light should be checked out by a professional as soon as possible.
If the Check Engine light is on steadily, manufacturers say it means there's a problem, but it probably doesn't require immediate service. The system is designed to remember the problem it found and store it (as a code) so it can be retrieved later.
When you do bring your vehicle in to have us see what's behind the Check Engine light coming on, we’ll hook your vehicle up to a diagnostics tool that can reveal the clues the engine's computers have stored. It takes a trained technician to understand those clues, like a doctor who can interpret a patient's symptoms and come up with the correct diagnosis. Some newer vehicles can even be checked remotely.
Once we figure out the problem and repair it, you'll be back on the road again. It's nice to know the Check Engine light is your sentry, standing by to alert you the next time you begin to "see the light."
Car Fix Waukegan
119 South Green Bay Road
Waukegan, IL 60085
8478738403
http://carfixwaukegan.com
Need Service?
More articles from Car Fix - Waukegan

Steer Clear of Power Steering Problems (Power Steering Maintenance)
October 27, 2025
We usually take our vehicle's easy steering for granted until something goes wrong. Power steering is what makes it almost effortless to turn the steering wheel, aiming your vehicle in the direction you want to go. Without the assistance of power from the engine, steering would be a laborious pr... More

No Fueling! (Fuel Filler Location)
October 23, 2025
If you've ever gotten in an unfamiliar vehicle, maybe a rental car, you may have pulled up to the gas pump and wondered, "Which side is the fuel filler on?" Here's a tip for you. There is usually a little arrow on the instrument panel near the fuel gauge that points to the side where the fuel fi... More

Things Aren't Always What They Seem
October 12, 2025
If you drive, you know at some point, something's going to go wrong with your vehicle. And sometimes, it's pretty easy to figure out what's wrong, like a flat tire. But sometimes your vehicle's symptoms can be really puzzling. One driver in IL was heading to work on a hot July day and noticed w... More
