Readers ask: What To Do When Check Engine Light Comes 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?

However, a flashing engine check light indicates that it is a serious problem that requires your immediate attention. If you see a flashing light, it’s best to contact a mechanic as soon as possible to prevent serious damage. To protect your vehicle—and avoid costly repairs—seek a mechanic’s help as soon as possible.

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What should I check when check engine light is on?

What to Do If Your “Check EngineLight Comes On

  1. Observe. Check the gauges on your dashboard.
  2. Check Your Gas Cap. Try tightening or replacing your gas cap.
  3. Reduce Pressure. If you notice that your vehicle’s performance has decreased, reduce your speed and avoid towing or transporting heavy cargo.
  4. Avoid Emissions Testing.

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

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 long can you drive with engine light on?

When the check engine light is solid, you can typically drive the car for hundreds of miles without an issue. Of course, that depends on which code is stored in the vehicle’s computer. If an engine sensor is faulty, the car will usually use made up sensor values to keep running.

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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.

Where can I get my check engine light read for free?

At a local auto parts store

  1. Advance Auto Parts.
  2. AutoZone.
  3. Napa Auto Parts.
  4. O’Reilly Auto Parts.
  5. Pep Boys Auto Parts.

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