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

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, multimeter, noid light.
• Ensure the engine is cool. Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Spark Plug

• Remove the ignition coil from cylinder 1:
  • Disconnect the wiring harness from the ignition coil.
  • Remove the bolts securing the ignition coil using a socket set.
  • Carefully pull the ignition coil out.
• Remove the spark plug:
  • Use a spark plug socket to remove the spark plug from cylinder 1.
  • Inspect the spark plug for wear or fouling; replace if necessary.
• Install new spark plug:
  • Apply anti-seize lubricant to the threads of the new spark plug.
  • Torque the spark plug to the manufacturer’s specifications (usually around 13 lb-ft).

3. Replace Ignition Coil

• If the ignition coil shows signs of damage:
  • Install a new ignition coil by reversing the removal steps.
  • Ensure the coil is seated properly and reconnect the wiring harness securely.

4. Check and Replace Fuel Injector

• If the fuel injector is faulty:
  • Disconnect the fuel line and wiring connector from the fuel injector.
  • Remove the fuel injector using a socket set.
  • Install a new fuel injector, ensuring it's seated properly.
  • Reconnect the fuel line and electrical connector.

5. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0301 code.