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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to prevent electrical shock.

2. Inspect and Replace Spark Plug

• Remove the ignition coil on cylinder 1:
  1. Unplug the electrical connector.
  2. Remove the mounting bolts using a socket set.
• Extract the spark plug using a spark plug socket.
• Inspect the spark plug for wear or damage; replace it if necessary with a new spark plug that meets OEM specifications.
• Reinstall the spark plug and ignition coil.

3. Replace Ignition Coil (if needed)

• If the ignition coil is faulty, replace it:
  1. Remove the old ignition coil by reversing the previous removal steps.
  2. Install the new ignition coil and ensure it is seated properly.
  3. Reconnect the electrical connector and secure the mounting bolts.

4. Check Fuel Injector

• If the spark plug and ignition coil are functioning correctly:
  1. Disconnect the fuel injector connector for cylinder 1.
  2. Use a noid light to check for proper signal to the injector.
  3. If there is no signal, inspect the wiring harness and replace the injector if it’s faulty.

5. Compression Test (if necessary)

• If misfire persists:
  1. Reconnect the battery.
  2. Remove the spark plug from cylinder 1.
  3. Insert a compression gauge and crank the engine to read compression.
  4. Compare results with manufacturer specifications; if low, investigate for valve or piston issues.