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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to avoid electrical shorts.
• Allow the engine to cool down before working.

2. Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench, anti-seize compound.
• Remove the ignition coil from cylinder 2 by unscrewing the bolts and disconnecting the electrical connector.
• Use a spark plug socket to remove the old spark plug.
• Apply a small amount of anti-seize compound to the threads of the new spark plug.
• Install the new spark plug and torque it to the manufacturer’s specified torque (typically around 13-15 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Replace Ignition Coil (if necessary)

• Tools Required: Socket set, torque wrench.
• If the ignition coil is faulty, remove it from cylinder 2 as described in the previous step.
• Install the new ignition coil and tighten it to the manufacturer’s specifications (usually around 7-10 lb-ft).
• Reconnect the electrical connector.

4. Check Fuel Injector (if necessary)

• Tools Required: Fuel pressure gauge, injector cleaning kit (if cleaning is required).
• If the fuel injector is suspected to be faulty, remove it from the fuel rail.
• Test the injector's resistance with a multimeter; it should match specifications (usually around 12-16 ohms).
• If cleaning, follow the injector cleaning kit instructions; otherwise, replace with a new injector.