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

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the battery to ensure safety during the repair process.
• Allow the engine to cool before starting work.

2. Address Error Codes

• If error codes indicate specific issues (e.g., P0420 for catalytic converter efficiency), replace the identified faulty component.
  • Tools Required: OBD-II scanner, socket set.
  • Sub-steps:
    1. Note the error code and research the relevant repair procedure.
    2. Remove the faulty component (e.g., catalytic converter, ignition coil) using the socket set.
    3. Install the new part according to manufacturer specifications.

3. Inspect and Replace Spark Plugs

• If spark plugs are worn or fouled, replace them.
  • Tools Required: Spark plug socket, torque wrench.
  • Sub-steps:
    1. Remove the ignition coils to access the spark plugs.
    2. Use the spark plug socket to unscrew and remove old spark plugs.
    3. Install new spark plugs and torque to manufacturer specifications (usually around 13-15 lb-ft).

4. Check Fuel System

• If fuel pressure is low, replace the fuel filter or fuel pump as necessary.
  • Tools Required: Fuel pressure gauge, socket set.
  • Sub-steps:
    1. Connect the fuel pressure gauge to the fuel rail.
    2. Start the engine and monitor the pressure reading; it should be within the manufacturer's range (typically 30-50 psi).
    3. Replace the fuel filter if pressure is inadequate. If it remains low, replace the fuel pump.

5. Inspect and Fix Vacuum Leaks

• Repair any identified vacuum leaks.
  • Tools Required: Smoke machine or carb cleaner.
  • Sub-steps:
    1. Use a smoke machine to introduce smoke into the intake system; observe for leaks.
    2. Alternatively, spray carb cleaner around the intake manifold and listen for engine RPM changes.
    3. Replace any damaged hoses or gaskets found during the inspection.