Published September 2026 · Crivelli Chevrolet Buick
What the light is actually telling you
When the check engine light comes on, your vehicle's onboard computer has detected something outside its normal range and stored a diagnostic trouble code. The light itself does not tell you the cause, only that there is one. Common triggers run from harmless to serious: a loose or failing gas cap, a bad oxygen sensor, a misfire, a catalytic converter issue, or a mass airflow sensor, among many others. Because one light can stand for hundreds of possible codes, guessing is a waste of time. The code has to be read to know what you are dealing with.
Steady versus flashing, and what to do
A steady check engine light generally means the issue is not an emergency, but it should still be diagnosed before it turns into a bigger repair. A flashing check engine light is more serious. It usually indicates an active engine misfire that can damage the catalytic converter, so you should ease off, avoid hard driving or heavy loads, and get it checked as soon as you can. A quick thing to try first is making sure your gas cap is tight, since a loose cap is a common and harmless cause. If the light stays on after a few drives, have it scanned.
Get it scanned at Crivelli
Crivelli Chevrolet Buick, family-run in Mount Pleasant since 1989, has a certified service department that reads trouble codes with factory diagnostic tools and interprets them correctly rather than just clearing the light. The team works on most makes, not only Chevrolet and Buick, and repairs with genuine GM and OEM parts. If your check engine light is on, call the service department at 724-613-8048 or stop by 1520 Route 31 in Mount Pleasant.
| Light behavior / cause | What it means and what to do |
|---|---|
| Steady light | Not an emergency, but get it diagnosed before it grows |
| Flashing light | Likely active misfire; ease off and get it checked soon |
| Loose gas cap | Common harmless cause; tighten it and see if the light clears |
| Oxygen or airflow sensor | Affects fuel and emissions; needs a scan to confirm |
| Misfire | Can damage the catalytic converter if ignored |
| At Crivelli | Factory scan tools read the exact code, most makes serviced |
Crivelli Chevrolet Buick
Mount Pleasant, PA 15666
The record, in short
Ready to talk? Visit crivellichev.com for current inventory, or call the sales desk at 724-547-2200.