What can cause the check engine light to come on in your car?

What can cause the check engine light to come on in your car?

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.

How do I fix the check engine light on my car?

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.

What does the Check Engine light look like on the dashboard?

The Check Engine Light location and color will vary by vehicle, but in most cases it is a dashboard warning light that is yellow and shaped like an engine.

What should I do if my check engine light appears?

If the check engine light comes on, here are some tips on what you should do: Look for a serious problem that requires immediate attention. Check your dashboard gauges and lights for indications of low oil pressure or overheating. Try tightening your gas cap. This can often solve the problem. Reduce speed and load. Use built-in diagnostic services, if available.

How do you check the Check Engine light?

Put your key in the ignition and switch the vehicle to “on.” Do not start the vehicle. Once the lights on the dash come on, turn off all the vehicle’s accessories, like the radio. Then, press the “read” button on the scanner to access the check engine light code.

Why check engine light is still 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.