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

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, fuel pressure gauge, compression tester, multimeter.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool before starting work.

2. Replace Spark Plug

• Remove the engine cover (if applicable) using a socket set.
• Disconnect the ignition coil connector from cylinder 1.
• Unbolt the ignition coil and remove it from the spark plug.
• Use a socket to remove the spark plug.
• Inspect the old spark plug for wear; if it is damaged or worn, replace it with a new spark plug that meets OEM specifications.
• Torque the new spark plug to the manufacturer's specifications (usually around 13-15 lb-ft).
• Reinstall the ignition coil and reconnect the connector.

3. Replace Ignition Coil (if necessary)

• If the ignition coil showed signs of damage, replace it.
• Install the new ignition coil over the spark plug and bolt it down securely.
• Reconnect the ignition coil electrical connector.

4. Inspect Fuel Injector (if necessary)

• If fuel delivery is suspected, remove the fuel rail (ensure fuel lines are depressurized).
• Check the injector for clogs or damage.
• If needed, replace the fuel injector with a new one, ensuring it is seated correctly in the fuel rail.
• Reinstall the fuel rail and reconnect any fuel lines.

5. Perform Compression Test (if necessary)

• If misfire persists, perform a compression test on cylinder 1.
• If compression is low, further investigation into valve sealing or piston condition may be required.
• Repair any underlying engine issues as necessary.