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

Solution

1. Preparation

• Gather tools and parts: OBD-II scanner, socket set, multimeter, compression gauge, replacement spark plugs, ignition coils, fuel injectors, and any necessary gaskets.
• Disconnect the negative battery terminal to prevent electrical issues during repairs.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the ignition coil from cylinder 1 by unplugging the electrical connector and unbolting it.
  2. Remove the spark plug using a spark plug socket.
  3. Inspect the spark plug for wear, carbon buildup, or damage. Replace it if necessary.
  4. Ensure the spark plug gap is set to the manufacturer’s specification (usually around 0.030 inches).
  5. Install the new or cleaned spark plug and torque it to the manufacturer’s specification (typically 12-15 lb-ft).
  6. Reinstall the ignition coil and reconnect the electrical connector.

3. Inspect and Replace Ignition Coil (if necessary)

• Sub-steps:
  1. If the coil is found to be faulty during testing, remove the ignition coil from cylinder 1.
  2. Install the new ignition coil and ensure it is seated properly.
  3. Reconnect the electrical connector and ensure a secure fit.

4. Check and Replace Fuel Injector (if necessary)

• Sub-steps:
  1. If the fuel injector is malfunctioning, disconnect the electrical connector and fuel line (use caution as fuel may spill).
  2. Remove the fuel injector from its rail.
  3. Install the new fuel injector, ensuring it is properly seated and seal it with a new O-ring if necessary.
  4. Reconnect the fuel line and electrical connector.

5. Reassemble and Test

• Reconnect the negative battery terminal.
• Clear the error codes using the OBD-II scanner.
• Start the engine and monitor for smooth operation and absence of the check engine light.