Readers ask: What to do when check engine light is on?

What could cause the check engine light to come on?

Spark Plugs

Finally, worn spark plugs or plug wires will result in a check engine warning. Just about anything wrong with your vehicle’s ignition system will likely cause your check engine light to come on. Stalls are another indicator of spark plug trouble.

Is it safe to drive your car with the check engine light on?

If the check engine light comes on while you’re driving, it can be unnerving. The check engine light means there’s a problem somewhere in your emissions system. Regardless, you’re safe to drive for now as long as the car isn’t performing strangely. Just have the check engine light checked and the problem repaired.

Where do I go when my check engine light is on?

1. Take your car to a mechanic and pay a diagnostic fee. Bring your car to an auto parts store and have the code read for free. The free check engine light diagnosis is good because if the code turns out to be for something minor, you might even be able to fix it yourself.

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Can low oil cause the check engine light to come on?

Low oil pressure

Low oil pressure is a common cause of a check engine light turning on, and it can seriously interfere with your car’s performance. Usually, if this is the case, your oil light will also appear. In any case, low enough oil pressure will disable your vehicle, so get this repaired immediately.

Will check engine light reset itself?

Your vehicle’s check engine light will will reset by itself once the issue or problem has been repaired; this is true for most models. If you are certain that you have resolved the issue that caused your check engine light to come on in the first place, then the light should reset itself after at least 20 cycles.

How many miles do you have to drive to clear a check engine light?

To make sure the check engine light does not reappear, it’s recommended that you drive your car 30 to 100 miles. This enables the vehicle’s “Drive Cycle” to reset, as the various sensors need time to recalibrate.

How serious is check engine light?

The check engine light — more formally known as the malfunction indicator lamp — is a signal from the car’s engine computer that something is wrong. If the light begins flashing, however, it indicates a more serious problem, such as a misfire that can quickly overheat the catalytic converter.

How long can you drive with the check engine light on?

The rule of thumb is that if the check engine light is flashing, you can‘t keep driving the car. It’s an emergency. Often it indicates an engine misfire. If you keep driving, you will likely cause irreversible damage, mostly to the (expensive) catalytic converter.

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Will AutoZone turn off check engine light?

Originally Answered: Can AutoZone turn off the check engine light? Yes, Autozone can use a scanner to read and clear DTC’s.

Can AutoZone tell me why my check engine light is on?

Does AutoZone Scan Check Engine Lights? AutoZone does. If your light is on, and you are wondering why, head down to your local AutoZone where one of our store associates can help diagnose the issue through our free Fix Finder service.

How much does it cost to get your check engine light checked?

On average, the fee to have an auto mechanic diagnose a check engine light is $100.

Can an overdue oil change cause check engine light?

Oil changes are essential maintenance for your car but it won’t do anything that could trigger your check engine light to come on. If you notice the light after an oil change, something else is wrong.

Can low oil cause misfire?

You can‘t drive a misfiring engine very long without causing additional damage. If the low oil pressure warning light came on, too, there could be a connection simply because running the engine too low on oil will cause mechanical damage and thence malfunctions of all kinds.

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