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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat, level surface and the engine is cool.
• Disconnect the battery to prevent any electrical issues while working.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench.
• Remove the ignition coil from cylinder 1 by unscrewing the retaining bolts and disconnecting the electrical connector.
• Use a socket to remove the spark plug from cylinder 1.
• Inspect the old spark plug; if it shows signs of wear or damage, replace it with a new spark plug.
• Torque the new spark plug to the manufacturer’s specification (usually around 13-15 lb-ft).
• Reinstall the ignition coil, ensuring it is securely connected.

3. Inspect and Replace Ignition Coil (if necessary)

• If the spark plug replacement did not resolve the issue, swap the ignition coil from cylinder 1 with one from a different cylinder.
• Clear the trouble codes using the OBD-II scanner.
• Start the engine to see if the misfire code reappears. If it does, replace the ignition coil.

4. Clean or Replace Fuel Injector

• If the misfire persists, inspect the fuel injector for cylinder 1.
• If clogged, use a fuel injector cleaner or replace the injector as necessary.
• Ensure proper reinstallation and connections.

5. Compression Test

• If all previous steps do not resolve the issue, perform a compression test on cylinder 1.
• If the compression is low, further investigation is needed to diagnose potential causes such as valve damage or piston ring issues.