why is my Ford F-150 13th Generation (2015-2020) check engine light on

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the battery terminal to ensure electrical safety.
• Allow the engine to cool down before proceeding.

2. Address Diagnostic Trouble Codes

• Based on the OBD-II scanner results, identify the relevant trouble codes.
• Research specific codes to determine the affected systems or components (e.g., P0420 for catalytic converter efficiency).

3. Repair or Replace Affected Components

• If the issue is a faulty oxygen sensor:
  • Remove the old sensor: Use a socket wrench to unscrew the old sensor.
  • Install the new sensor: Apply anti-seize compound to the threads of the new sensor and tighten to the manufacturer's torque specification (typically 30 ft-lbs).
• If the gas cap is damaged:
  • Replace the gas cap: Remove the old cap and install the new one, ensuring it clicks securely in place.
• For exhaust leaks:
  • Inspect exhaust connections: Tighten loose bolts or replace gaskets as necessary.

4. Clear Error Codes

• Reconnect the battery terminal.
• Use the OBD-II scanner to clear the error codes and reset the check engine light.

5. Final Checks

• Start the engine and let it idle; observe for any abnormal noises or behaviors.
• Conduct a test drive to ensure that the check engine light remains off and performance is restored.