Why Is My Check Engine Light On but My Car Feels Fine?

This often means the computer found a problem before you noticed any change in how the vehicle drives.

A loose gas cap, small leak, bad sensor, or engine problem can all turn on the Check Engine Light. The best way to find the cause is to have the vehicle tested.

Why Is My Check Engine Light On with No Other Problems?

Your vehicle has sensors that watch the engine and other systems while you drive. If the computer sees something that is not right, it may turn on the Check Engine Light. Some problems are small at first and may not change how the vehicle feels. That does not mean the light should be ignored.

What Are Common Causes of a Check Engine Light?

Many different problems can turn the light on. Some common causes include:

• A loose or bad gas cap
• A bad oxygen sensor
• A worn spark plug
• An engine misfire
• An EVAP system leak
• A bad sensor
• A catalytic converter problem

The light alone cannot tell you which part is bad. Testing is needed to find the real cause.

Can a Loose Gas Cap Turn On the Check Engine Light?

Yes. A loose, damaged, or missing gas cap can cause the Check Engine Light to come on. Make sure the cap is tight after you fill the tank. If the light stays on, there may be another problem that needs to be checked.

What Does a Check Engine Light Code Tell You?

When the Check Engine Light comes on, the vehicle stores a trouble code. A scan tool can read that code and show which system found a problem.

The code does not always tell you which part to replace. More testing may be needed to find out why the code was set. Replacing parts based only on a code can waste money if that part was not the cause.

What If the Check Engine Light Is Flashing?

A flashing Check Engine Light is more serious than a light that stays on. It can mean the engine is misfiring badly enough to cause more damage.

If the light starts flashing, reduce your speed and have the vehicle checked as soon as you can. If the engine is shaking, losing power, or running poorly, it may be safer to stop driving.

Can I Keep Driving with the Check Engine Light On?

If the light stays on and the car feels normal, you may not have an emergency. You should still have the problem checked soon.

Waiting can allow a small problem to become worse. It may also hurt fuel mileage or cause damage to other parts.

Can Checking the Light Early Save Money?

Yes. Finding the cause early can help stop a small problem from turning into a costly repair. It can also keep you from buying parts you do not need. Proper testing finds the cause instead of guessing based on the trouble code.

Schedule Check Engine Light Testing in The Colony, TX

If your Check Engine Light is on but your car seems to run fine, don't wait for another symptom to show up. At David's Automotive Repair, we can scan the vehicle, test the system, and find the cause of the warning light.

Call David's Automotive Repair at 972-625-1836 or schedule your reservation online today. We provide Check Engine Light testing, engine diagnostics, engine repair, and auto repair in The Colony, TX to help keep your vehicle running its best.