how to fix the P0301 misfire code in my Ford F-150 13th Generation (2015-2020)

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, multimeter, fuel injector cleaner.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before starting any work.

2. Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover (if applicable) to access the ignition system.
  2. Disconnect the ignition coil connector for cylinder 1.
  3. Unscrew the ignition coil from the cylinder head using a socket wrench.
  4. Remove the spark plug using a spark plug socket.
  5. Inspect the old spark plug for wear; replace it with a new spark plug (ensure it meets OEM specifications).
  6. Reinstall the ignition coil and reconnect the connector.

3. Replace Ignition Coil (if necessary)

• Sub-steps:
  1. If the ignition coil was found defective during inspection, remove it as described in the previous step.
  2. Install the new ignition coil in place of the old one.
  3. Secure it with the screws and reconnect the electrical connector.

4. Clean or Replace Fuel Injector (if clogged)

• Sub-steps:
  1. Remove the fuel injector rail as per manufacturer guidelines.
  2. If cleaning, use a fuel injector cleaner and follow proper procedures; if replacing, install a new fuel injector.
  3. Reattach the fuel rail and ensure all connections are secure.

5. Conduct Compression Test

• Sub-steps:
  1. Remove the spark plug from cylinder 1.
  2. Insert the compression tester into the spark plug hole.
  3. Crank the engine several times and note the compression reading. It should be within the manufacturer’s specified range.
  4. If compression is low, further investigation into valve or piston issues may be necessary.