why does my Ford Explorer Fifth Generation (2011-2019) check engine light keep coming on

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the battery to prevent any electrical issues while working.

2. Retrieve and Address Error Codes

• Use an OBD-II scanner to read the diagnostic trouble codes (DTCs).
• Research the codes to determine the specific issue (e.g., P0300 for random misfire).
• Document the codes for reference during repairs.

3. Inspect and Replace Components

• Gas Cap Inspection:

  • Check the gas cap for cracks or wear.
  • If damaged, replace with a new gas cap.

• Spark Plug and Ignition Coil Replacement:

  • Remove the ignition coils by unscrewing them.
  • Replace spark plugs using a spark plug socket and torque to manufacturer specifications (typically 13-15 lb-ft).
  • Reinstall the ignition coils.

• Air Intake System Check:

  • Remove the air filter housing and inspect the air filter.
  • Replace if dirty or clogged.
  • Check for any loose or damaged hoses in the intake system and replace as needed.

4. Reconnect Battery and Clear Codes

• Reconnect the battery terminals.
• Use the OBD-II scanner to clear any stored error codes from the system.

5. Test Drive

• Start the vehicle and take it for a short test drive.
• Monitor the check engine light to see if it remains off after driving.