Why Does My Check Engine Light Come 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 with 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.

How do you fix a check engine light?

If the check engine light comes on, here are some tips on what you should do:

  1. Look for a serious problem that requires immediate attention.
  2. Try tightening your gas cap.
  3. Reduce speed and load.
  4. Use built-in diagnostic services, if available.
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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.

Can AutoZone check engine light?

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 long can I 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.

How urgent is a check engine light?

Unlike a Temperature or Oil Pressure light, a Check Engine light is usually not an urgent, “Stop right now or you may cause permanent damage!” type of situation, unless it is flashing. If your gas cap is loose or the seal is not tight, the vapor leakage can cause your fuel system to trigger the check engine light.

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Who does check engine lights for free?

FREE Check Engine Light Help is one of several free services offered by O’Reilly Auto Parts. Here are some others: FREE Battery Testing.

How much is it to fix a check engine light?

The national average repair cost linked to a car or truck’s check engine light now stands at $357, including parts ($216) and labor ($141).

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.

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.

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