why does my Ford F-150 13th Generation (2015-2020) engine light keep coming back on

Solution

1. Preparation

• Gather tools: OBD-II scanner, socket set, multimeter, torque wrench, and safety goggles.
• Disconnect the battery to prevent electrical shorts during repairs.

2. Address Fault Codes

• Connect the OBD-II scanner and retrieve stored codes.
• Research each code to determine the associated issue (e.g., P0420 for catalytic converter efficiency).
• Clear the codes and monitor if they return after a test drive.

3. Inspect and Replace Components

• For faulty ignition components:
  • Spark Plugs: Remove old spark plugs using a socket wrench. Inspect for wear or damage and replace with new plugs, torquing to the manufacturer’s specifications (usually around 13-15 lb-ft).
  • Ignition Coils: Disconnect the electrical connectors and remove mounting screws. Install new coils, ensuring proper seating and connection.

4. Check and Replace Gas Cap

• Inspect the gas cap for proper sealing. If damaged, replace the gas cap with an OEM equivalent to ensure a tight fit.

5. Examine Exhaust System

• Visually inspect the exhaust system for any signs of leaks or corrosion. Use a smoke test if necessary to detect leaks. Repair or replace damaged components as needed.