how to fix P0301 cylinder 1 misfire code in Ford F-150 Fourteenth Generation (2021-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle battery to ensure safety.
• Allow the engine to cool down before working.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the engine cover if applicable.
• Locate cylinder 1 spark plug (refer to service manual for location).
• Use the spark plug socket to remove the old spark plug.
• Inspect the gap on the new spark plug and adjust to manufacturer specifications.
• Install the new spark plug and torque to the manufacturer's specifications (usually around 13-15 lb-ft).

3. Test/Replace Ignition Coil

• Tools Required: Multimeter, socket set.
• Disconnect the electrical connector from the ignition coil on cylinder 1.
• Use a multimeter to check for proper resistance; refer to service manual for specifications.
• If the coil is faulty, remove the old ignition coil and install a new one, ensuring the electrical connector is firmly attached.

4. Inspect/Replace Fuel Injector

• Tools Required: Fuel injector removal tool, socket set.
• Turn off the fuel pump and relieve fuel system pressure.
• Disconnect the fuel injector connector and remove the injector from cylinder 1.
• Inspect the injector for clogs; clean or replace if necessary.
• Reinstall the injector, ensuring a proper seal is achieved.

5. Check Compression

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 1.
• Insert the compression tester into the spark plug hole and crank the engine.
• Record the compression reading; reference service manual for acceptable values.
• If the compression is low, further investigation into the engine's internal components may be required.