Readers ask: Why Is My Service Engine Light On?

What causes the service engine light to come on?

Six of the most common malfunctions that cause the check engine light to come on are: Loose or Faulty Gas Cap. Vacuum Leaks. Spark Plugs, Ignition Coils or Ignition Wires.

Is it okay to drive with service 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.

What do you do when your service engine light comes on?

What to Do About the Check Engine Light

  1. Look for a serious problem that requires immediate attention. Check your dashboard gauges and lights for indications of low oil pressure or overheating.
  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.

Can AutoZone check service engine soon?

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.

Is check engine light serious?

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 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.

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Is there a difference between check engine and service engine soon?

The “Check Engine” light is a notification that something is wrong, the range can be anything from a loose gas cap to a faulty ignition coil. The “Service Engine Soon” light indicates that your vehicle is due for its next service maintenance. The light comes on depending on your vehicles service interval.

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.

How do I get the service engine soon light to go off?

Cycle ignition switch to ON position and wait 1 minute, then start your vehicle. Check Engine Light or Service Engine Soon Light should be reset and turned OFF.

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.

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.

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