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

Solution

1. Preparation

• Gather tools and parts needed.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Remove Ignition Coil and Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the engine cover if necessary to access the ignition coil.
• Unscrew the bolts securing the ignition coil and carefully pull it out.
• Use the spark plug socket to remove the spark plug from cylinder 2.

3. Inspect and Replace Spark Plug

• Inspect the spark plug for signs of wear, damage, or carbon buildup.
• If necessary, replace the spark plug with a new one that matches manufacturer specifications (check gap size).
• Torque the new spark plug to the manufacturer’s specified value (usually around 13-15 lb-ft).

4. Test and Replace Ignition Coil (if needed)

• Use a multimeter to test the ignition coil’s resistance (consult the service manual for specific resistance values).
• If the ignition coil is faulty, replace it with a new one.
• Reinstall the ignition coil, ensuring it is seated properly and secured with bolts to the manufacturer’s torque specifications.

5. Inspect and Clean Fuel Injector

• If the ignition coil and spark plug are in good condition, inspect the fuel injector.
• Remove the fuel injector connector and unscrew the injector from the fuel rail.
• Clean the injector or replace it with a new one if there are signs of clogging or damage.
• Reinstall the injector, ensuring it is seated properly and reattach the connector.

6. Reassemble and Reconnect Battery

• Reinstall any components removed (engine cover, etc.).
• Reconnect the negative battery terminal.