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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the engine is cool.
• Disconnect the negative terminal of the battery.

2. Replace Spark Plug

• Tools Required: Socket set, spark plug socket, torque wrench.
• Remove the ignition coil from cylinder 1:
  • Unplug the electrical connector.
  • Remove the bolts securing the ignition coil.
  • Gently pull the ignition coil out.
• Remove the spark plug:
  • Use the spark plug socket to unscrew the old spark plug.
  • Inspect the old spark plug for signs of wear or damage.
• Install the new spark plug:
  • Hand-tighten the new spark plug, then use the torque wrench to tighten it to the manufacturer's specification (typically around 13-15 lb-ft).

3. Inspect/Replace Ignition Coil

• If the spark plug replacement did not resolve the issue, proceed to inspect the ignition coil:
  • Swap the ignition coil from cylinder 1 with another cylinder.
  • Reconnect the battery and start the engine to see if the misfire code follows the ignition coil.
• If the misfire moves to the new cylinder, replace the faulty ignition coil with a new one.

4. Clean/Replace Fuel Injector

• If the ignition coil is functioning correctly, check the fuel injector:
  • Remove the fuel rail to access the injector for cylinder 1.
  • Clean the injector using a fuel injector cleaning kit or replace it if clogged or faulty.

5. Check Compression

• Perform a compression test on cylinder 1:
  • Remove the spark plug and install a compression gauge.
  • Crank the engine and note the compression reading.
  • If the compression is below the manufacturer's specification, further engine diagnostics may be required.