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

Solution

1. Preparation

• Gather all tools and parts needed for repair.
• Disconnect the vehicle's battery to prevent electrical shorts.
• Allow the engine to cool before starting any work.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil connector and the ignition coil from cylinder 2.
• Use the spark plug socket to remove the old spark plug.
• Inspect the spark plug for condition; replace if worn or fouled.
• Install the new spark plug to the specified torque (typically around 13-15 lb-ft).
• Reinstall the ignition coil and connector.

3. Replace Ignition Coil (if needed)

• Tools Required: Socket set, torque wrench.
• If the ignition coil was found to be faulty, remove it after the spark plug replacement.
• Install the new ignition coil, ensuring it is seated properly.
• Torque the coil mounting bolt to the manufacturer's specification (usually around 10-12 lb-ft).

4. Clean or Replace Fuel Injector (if needed)

• Tools Required: Fuel injector cleaning kit or replacement injector.
• If the fuel injector is clogged, either clean it using a cleaning kit or replace it.
• Ensure the injector o-rings are lubricated with clean engine oil before installation.
• Install the injector and reconnect the fuel rail.

5. Reassemble and Reconnect

• Reconnect the battery.
• Start the engine and allow it to idle for a few minutes to ensure there are no leaks and the check engine light does not reappear.