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

Solution

1. Preparation

• Gather tools and necessary parts.
• Disconnect the battery to ensure safety.

Tools Required:

• OBD-II scanner
• Socket set
• Torque wrench
• Compression tester
• Multimeter
• Noid light
• Safety gloves and glasses

2. Inspect and Replace Spark Plug

• Remove the ignition coil from cylinder 1.
• Unscrew and remove the spark plug using a spark plug socket.
• Inspect the spark plug for wear; if damaged, replace it with a new one, ensuring the correct gap.
• Reinstall the spark plug and torque it to the manufacturer’s specifications (typically around 13 lb-ft).

3. Test and Replace Ignition Coil

• Use a multimeter to check the resistance of the ignition coil.
• If it does not meet specifications, remove the coil and replace it with a new one.
• Reconnect the ignition coil and ensure it is seated properly.

4. Compression Test

• Remove the spark plug for cylinder 1.
• Insert the compression tester into the spark plug hole and crank the engine.
• Record the reading; it should meet the manufacturer's specifications (usually between 120-180 psi).
• If compression is low, further investigation into internal engine components may be necessary.

5. Inspect and Test Fuel Injector

• Disconnect the fuel injector connector for cylinder 1.
• Use a noid light to check for signal when cranking the engine; if no signal is detected, check wiring and ECM.
• If the injector is not operating properly, remove and replace it.