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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a level surface, and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil from cylinder 1 by unbolting it and disconnecting the electrical connector.
• Use a spark plug socket to remove the old spark plug from cylinder 1.
• Inspect the new spark plug for proper gap (typically 0.030-0.035 inches for F-150) and install it, torquing it to 13 lb-ft.
• Reinstall the ignition coil, ensuring the connection is secure.

3. Test and Replace Ignition Coil (if needed)

• Tools Required: Multimeter.
• Measure the resistance of the ignition coil using the multimeter.
• If the resistance is outside the manufacturer’s specifications, replace the ignition coil with a new one.
• Reinstall the ignition coil and reconnect the electrical connector.

4. Inspect and Replace Fuel Injector (if needed)

• Tools Required: Fuel injector removal tool, fuel line disconnect tool.
• Disconnect the fuel line and electrical connector from the injector.
• Remove the fuel injector from cylinder 1.
• Check for clogs or damage. If necessary, replace the injector with a new one.
• Reinstall the new injector, ensuring proper seating and reconnect the fuel line.

5. Verify Compression (if needed)

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 1 and adjacent cylinders.
• Insert the compression tester into cylinder 1 and crank the engine for a few seconds.
• Compare the compression readings with manufacturer specifications (usually around 120-150 psi).
• If compression is low, further inspection may be required for internal engine issues.