how to fix Ford F-150 14th Generation (2021-2024) check engine light code P0301?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool down before proceeding.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil from cylinder 1:
  • Disconnect the electrical connector.
  • Unbolt the coil and carefully pull it out.
• Remove the spark plug:
  • Use a spark plug socket to unscrew the spark plug.
  • Inspect the spark plug for wear or damage.
• Replace with a new spark plug (OEM recommended):
  • Install the new spark plug, hand-tighten, then torque to manufacturer specifications (typically around 13-15 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Inspect and Replace Ignition Coil (if necessary)

• If the spark plug was not the issue, check the ignition coil:
  • Use a multimeter to test the coil’s primary and secondary resistance.
• Replace the ignition coil if it is out of specification:
  • Follow the same removal and installation steps as with the spark plug.

4. Check Fuel Injector Function

• Tools Required: Fuel pressure gauge, injector cleaning kit.
• Disconnect the fuel injector connector for cylinder 1.
• Test the injector's resistance with a multimeter; if out of range, replace the injector.
• If the injector is functional, consider cleaning it using an injector cleaning kit while following the manufacturer's instructions.

5. Perform Compression Test

• Tools Required: Compression tester.
• Remove spark plugs from all cylinders.
• Insert the compression tester into cylinder 1 and crank the engine.
• Record the pressure reading; compare it against manufacturer specifications.
• If compression is low, further diagnostic procedures should be conducted to identify internal engine issues.