how to fix P0301 misfire code in my Ford F-150 14th Generation (2021-2024)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before working on components.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil from cylinder 1 by unscrewing the retaining bolts.
• Pull the ignition coil straight out to avoid damaging it.
• Remove the spark plug using a spark plug socket.
• Inspect the spark plug for carbon buildup or damage; replace with a new spark plug if necessary. Torque the new spark plug to the manufacturer’s specification (typically around 13-15 lb-ft).
• Reinstall the ignition coil ensuring it clicks into place.

3. Check and Replace Ignition Coil

• If the spark plug is fine, test the ignition coil with a multimeter or replace it if it shows signs of failure.
• Tools Required: Multimeter, socket set.
• Reconnect the ignition coil and ensure all connections are secure.

4. Inspect and Clean Fuel Injector

• Remove the fuel injector from cylinder 1 if symptoms persist.
• Tools Required: Fuel injector removal tool, cleaning solvent.
• Clean the injector using an appropriate solvent or replace it if it’s damaged.
• Reinstall the fuel injector, ensuring proper seating and connection.

5. Compression Test

• If misfire symptoms continue, conduct a compression test.
• Tools Required: Compression tester.
• Remove the spark plug and insert the compression tester into cylinder 1.
• Crank the engine and record the compression reading; it should be within the manufacturer’s specified range.
• If low, further diagnostics on engine internals may be necessary.