Check Engine Light Came On

Your check engine light came on and now you're wondering how worried to be. That uncertainty is the worst part.

When the check engine light comes on, your car's computer has flagged a problem and stored a trouble code. Don't panic — it doesn't always mean something catastrophic. The most common triggers are oxygen sensor issues, catalytic converter efficiency codes, evaporative emission leaks (often a loose gas cap), misfires, and mass airflow sensor problems. The first thing to check is your gas cap — tighten it, and if that was the issue, the light will clear after a few drive cycles.

Pay attention to how the car is running. If it drives normally with no unusual sounds, smells, or performance changes, the issue is likely emissions-related and not immediately urgent — but still worth diagnosing. If you notice rough running, loss of power, unusual smells, or the light is flashing, the problem is more serious and should be addressed right away. A flashing light specifically means a misfire severe enough to damage the catalytic converter.

Ez Mobile Mechanic diagnoses check engine lights throughout Jacksonville. As a mobile mechanic in Jacksonville, we come to your location with professional scan tools to read the exact code and test the related system. We tell you what's actually wrong, not what might be wrong. No tow truck needed. Call (904) 788-7272.