how to fix P0302 misfire code in Ford F-150 14th Generation (2021-2024)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent any electrical shorts.
• Ensure the engine is cool before beginning work.

2. Replace Spark Plug

1. Remove the ignition coil from cylinder 2 by unscrewing the retaining bolts and disconnecting the electrical connector.
2. Use a spark plug socket to remove the old spark plug from cylinder 2.
3. Inspect the new spark plug to ensure it matches OEM specifications.
4. Apply anti-seize compound to the threads of the new spark plug (if applicable).
5. Install the new spark plug and torque it to the manufacturer’s specifications (typically around 13-15 lb-ft).
6. Reinstall the ignition coil and reconnect the wiring harness.

3. Replace Ignition Coil (if necessary)

1. If the ignition coil is found to be faulty during diagnostics, remove it from cylinder 2.
2. Install the new ignition coil, ensuring a secure fit and proper connection.
3. Reconnect the electrical connector.

4. Clean or Replace Fuel Injector (if necessary)

1. Remove the fuel rail to access the fuel injector for cylinder 2.
2. If cleaning, use a fuel injector cleaning kit to flush the injector.
3. If replacement is necessary, install the new injector, ensuring proper orientation and sealing.
4. Reattach the fuel rail and ensure all connections are secure.

5. Check for Vacuum Leaks

1. Inspect all vacuum lines and gaskets around the intake manifold.
2. Replace any damaged or cracked hoses.
3. Use an aerosol spray (like carb cleaner) around suspected areas while the engine is running to identify leaks.