Why does my check engine light come on for a few days and then go off?

Why does my check engine light come on for a few days and then go off?

In a perfect world, you’ll find that a check engine light on and off intermittently is being caused by a loose gas cap. But many times, a check engine light will be caused by something other than a loose gas cap. It can, for example, be caused by a faulty oxygen sensor.

How long should check engine light stay on?

about 50 to 100 miles
Maybe it cost you a fortune. So why is the light still on? Here’s something you probably don’t know: after clearing the car’s computer you will need to drive for about 50 to 100 miles. As you drive your car the computer will monitor all the sensors and register the results.

What does it mean when check engine light turns off?

Check your dashboard gauges and lights for indications of low oil pressure or overheating. These conditions mean you should pull over and shut off the engine as soon as you can find a safe place to do so. On some cars, a yellow check engine light means investigate the problem and a red one means stop right now.

How do you turn off the Check Engine light off?

How to Get Rid of the “Check Engine” Light 4 Ways to Turn off the “Check Engine” Light 1. Drive Your Car and Let the Light Go off by Itself 2. Turn the Car on and off Three Times 3. Disconnect and Reconnect the Battery 4. Use an OBD Code Reader

What would cause the Check Engine light to be on?

One Sensor has a Loose Electrical Connection or is Damaged.

  • trucks and SUV’s are very carefully monitored for fuel economy and emissions.
  • Damaged O2 sensor.
  • Catalytic Converter is Clogged.
  • Air Filter or Fuel Filter is Dirty.
  • Mass Air Flow Sensor is Damaged.
  • Engine has Oil Lubrication Issues.

    What to do if your “check engine” light turn on?

    then slowly pull the car off the road

  • turn the engine off and consult the owner’s manual for your vehicle.
  • Think About the Last Time You Got Gas.

    What caused recent check engine light?

    Common causes of a flashing or blinking check engine light Misfires on one or several cylinders (most common) Faulty spark plugs/Coils Faulty engine sensors (coolant, air temperature, exhaust temperature sensor etc) Faulty EGR valve Faulty/ bad injectors Faulty crankshaft/camshaft sensor Exhaust