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

Solution

1. Preparation

• Gather tools and parts required.
• Ensure the vehicle is parked on a level surface, the engine is cool, and the battery is disconnected for safety.

2. Inspect and Replace Spark Plug

• Tools Required: Spark plug socket, torque wrench, gap gauge.
• Remove the ignition coil from cylinder 1.
• Unscrew the spark plug using the spark plug socket.
• Inspect the spark plug for wear; if damaged, replace it with a new one.
• Set the gap on the new spark plug according to manufacturer specifications (usually around 0.040 inches).
• Install the new spark plug and torque it to the manufacturer’s specifications (typically around 13-15 lb-ft).

3. Check and Replace Ignition Coil

• Tools Required: Socket set.
• Remove the ignition coil from cylinder 1.
• If swapping with a known good coil did not resolve the misfire, replace the ignition coil with a new part.
• Reinstall the ignition coil ensuring it is seated properly.

4. Inspect and Clean/Replace Fuel Injector

• Tools Required: Fuel injector removal tool or socket set, fuel line disconnect tool.
• Disconnect the fuel line and electrical connector from the fuel injector for cylinder 1.
• Remove the fuel injector using the appropriate tool.
• Inspect for clogs; if dirty, clean it using a fuel injector cleaning solution or replace with a new injector.
• Reinstall the fuel injector ensuring it is seated correctly.

5. Perform Compression Test (if necessary)

• 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; compare it with manufacturer specifications.
• If compression is low, further diagnostics into internal engine issues may be necessary.