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What to Do When Your Check Engine Light Is On and Your Car Runs Poorly

Tammy Warren • November 27, 2024

Seeing the check engine light illuminate on your dashboard can be a cause for concern, especially if your car is

running poorly. It’s a signal that something is wrong within your vehicle’s engine or emissions system. Here’s

what you should do if you find yourself in this situation.

1. Don’t Ignore It

First and foremost, don’t ignore the check engine light. While it might seem like a minor issue, it can indicate

serious problems that could lead to more significant damage or costly repairs if left unaddressed.


2. Check for Obvious Issues

Before heading to the mechanic, take a moment to inspect your vehicle for any obvious problems. Look for

things like loose or damaged gas caps, which can trigger the check engine light. Additionally, check for any

unusual sounds, smells, or smoke. If you notice anything concerning, make a note of it to share with your

mechanic.


3. Limit Driving

If your car is running poorly—whether it’s stalling, sputtering, or hesitating—limit your driving as much as

possible. Continuing to drive can exacerbate the issue and lead to further damage. If the car is unsafe to drive,

consider having it towed to a repair shop.


4. Get a Diagnostic Test

The best way to determine the cause of the check engine light is to have a diagnostic test performed by a

qualified mechanic. They will use specialized equipment to read the trouble codes stored in your vehicle’s

computer. This will help pinpoint the issue and guide necessary repairs.



5. Follow Through with Repairs

Once your mechanic identifies the problem, follow through with the recommended repairs. Ignoring the root

cause can lead to more severe issues down the line, impacting your vehicle’s performance and safety.

If your check engine light is on and your car is running poorly, it’s essential to act promptly. Don’t ignore the

warning; check for obvious issues, limit driving, and seek professional help. Addressing the problem early can

save you time, money, and hassle while ensuring your vehicle remains safe and reliable on the road.

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