how to fix P0302 misfire code in Ford F-150 Fourteenth Generation (2021-present)

Solution

1. Preparation

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

2. Replace Spark Plug (if faulty)

• Remove the engine cover (if applicable).
• Use a spark plug socket to carefully unscrew and remove the spark plug from cylinder 2.
• Inspect the spark plug for signs of fouling or damage. If damaged, replace with a new spark plug that meets OEM specifications (typically Motorcraft SP-534 for 2021 F-150).
• Torque the new spark plug to the manufacturer’s specification (usually around 13-15 lb-ft).

3. Replace Ignition Coil (if faulty)

• Locate the ignition coil for cylinder 2.
• Disconnect the electrical connector from the ignition coil.
• Remove the mounting bolt(s) securing the ignition coil and lift the coil out of the spark plug well.
• Install the new ignition coil (OEM recommended part) and secure it with the mounting bolt(s).
• Reconnect the electrical connector.

4. Inspect and Clean Fuel Injector (if needed)

• If the fuel injector is suspected to be faulty, remove it by disconnecting the fuel rail (ensure fuel lines are depressurized first).
• Clean or replace the fuel injector for cylinder 2 as needed. Use a fuel injector cleaning kit if cleaning.
• Reinstall the fuel injector ensuring proper seating and connections.

5. Reassembly and Final Checks

• Reattach any components removed during the process, such as the engine cover.
• Reconnect the negative battery terminal.
• Start the engine and allow it to reach operating temperature.