how to fix P0302 misfire code in Ford F-150 13th Generation (2015-2020)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil from cylinder 2 by unscrewing the mounting bolts.
• Pull the ignition coil straight out of the spark plug socket.
• Remove the old spark plug using the spark plug socket.
• Install the new spark plug, ensuring it is gapped correctly to manufacturer specifications (typically around 0.050 inches).
• Torque the spark plug to the manufacturer’s specification (usually around 13 lb-ft).
• Reinstall the ignition coil and secure it with the mounting bolts.

3. Replace Ignition Coil

• Tools Required: Socket set, torque wrench.
• If the ignition coil was found faulty, remove it from the engine.
• Disconnect the electrical connector from the ignition coil.
• Install the new ignition coil, ensuring it seats properly on the spark plug.
• Reconnect the electrical connector and secure the ignition coil with the mounting bolts.

4. Inspect or Replace Fuel Injector

• Tools Required: Fuel injector puller (if needed), socket set.
• If the fuel injector is suspected to be faulty, remove it from the engine rail.
• Check for clogging or physical damage. Clean or replace it as necessary.
• Reinstall the fuel injector, ensuring it is seated properly and connected.

5. Reassemble and Test

• Reconnect the negative battery terminal.
• Start the engine and allow it to reach normal operating temperature.
• Monitor for any check engine light illumination and listen for smooth operation.