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Diagnostics · January 21, 2025

Check Engine Light: Flashing vs. Solid

A solid check engine light means your car has detected a fault that should be diagnosed soon. A flashing check engine light usually signals a severe engine misfire that can damage the catalytic converter — ease off, avoid hard acceleration, and get the car checked as soon as you safely can.

Illustration of a mechanic inspecting a car with a clipboard

Solid: get it checked soon

A steady light means the engine computer has stored a fault code. It could be something minor — a loose gas cap is a classic — or the early sign of something that will get more expensive if it’s ignored. The car is usually safe to drive to a shop, but don’t put it off: delaying a diagnosis can turn a small issue into a complex, costly repair.

Flashing: act now

A blinking light typically means the engine is misfiring badly enough that unburned fuel is reaching the exhaust. That can overheat and damage the catalytic converter. Reduce speed, avoid heavy loads and hard acceleration, and get it looked at right away. If the car is running very roughly, it’s safer to stop and arrange a tow.

Cars raised on lifts for repair inside the Neal’s Garage shop in Durham
Inside the shop: cars up on the lifts.

What we do when you bring it in

We read the stored codes with the same manufacturer-specific scan tools dealerships use, then go further: a code tells us which system flagged a problem, not always why. We pinpoint the cause, explain it in plain terms, and give you a clear recommendation. See check engine light diagnosis.

Other lights to know

The check engine light is one of many. Red lights like oil pressure and temperature mean stop as soon as it’s safe. Our guide to dashboard warning lights covers the rest.

Can I prevent it?

Not every fault is preventable, but regular service catches a lot: fresh oil, healthy fluids, and the free multi-point inspection we do on every visit. Our older post, Top 10 signs your car needs a tune-up, lists other early warnings.

Call 919-286-1167 or schedule an appointment — we’re open Monday to Friday, 8:00 AM to 5:30 PM at 1907 West Markham Avenue, right off Ninth Street.

Frequently asked questions

Can I drive with a flashing check engine light?

Only as far as you must, gently. A flashing light usually means a severe misfire that can damage the catalytic converter. Get the car checked right away, or have it towed if it runs very roughly.

Can Neal’s Garage read check engine codes?

Yes. Neal’s Garage uses manufacturer-specific scan tools — the same kind dealerships use — and diagnoses the actual cause behind the code.

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Ready when you are

ASE-certified mechanics serving Durham, NC since 1950. Book online or call 919-286-1167 — Mon–Fri 8:00 AM – 5:30 PM.

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