how to fix the check engine light on my Ford F-150 14th Generation (2021-2024)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Address Fault Codes

• Sub-step 1: Using the OBD-II scanner, note the trouble codes and refer to a service manual for detailed descriptions.
• Sub-step 2: For common codes (e.g., P0420 for catalytic converter efficiency), inspect related components as per the service manual.

3. Repair or Replace Identified Components

• Sub-step 1: If the issue is with the gas cap, replace it with a new, OEM-quality part.
• Sub-step 2: If spark plugs or ignition coils are faulty, remove the engine cover and disconnect the electrical connectors before removing and replacing them.
  • Use a torque wrench to tighten new spark plugs to the manufacturer's specifications (usually around 13-15 lb-ft).
• Sub-step 3: If fuel pressure is low, inspect the fuel pump and replace it if necessary. Ensure to relieve fuel pressure before replacement.

4. Clear Error Codes

• Sub-step 1: After repairs, reconnect the negative battery terminal.
• Sub-step 2: Use the OBD-II scanner to clear the error codes.

5. Final Inspection

• Sub-step 1: Start the engine and observe for any abnormal sounds or behaviors.
• Sub-step 2: Conduct a test drive to ensure the check engine light remains off and performance is normal.