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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the battery to prevent electrical shock.

2. Inspect and Replace Spark Plug

• Remove the engine cover if applicable.
• Locate cylinder 1 (usually the front left in a V8 engine).
• Use a socket wrench to remove the spark plug.
• Inspect the spark plug for wear, carbon deposits, or damage.
• If necessary, replace the spark plug with the manufacturer's recommended part (e.g., Motorcraft SP-534).

3. Check and Replace Ignition Coil

• Disconnect the ignition coil connector.
• Remove the ignition coil using a socket wrench.
• Inspect the coil for cracks or damage.
• Replace the ignition coil if faulty (recommended part: Motorcraft DG-511).
• Reinstall the ignition coil and reconnect the connector.

4. Test Fuel Injector

• Disconnect the fuel injector connector and remove it.
• Use a multimeter to test the injector's resistance (should be within manufacturer specifications).
• If faulty, replace the fuel injector with a new one (recommended part: Motorcraft CM-5107).
• Reinstall the fuel injector and reconnect the connector.

5. Perform Compression Test

• Remove the spark plug from cylinder 1.
• Insert a compression gauge into the spark plug hole.
• Crank the engine and record the compression reading.
• Compare the result to manufacturer specifications. If low, further investigation into internal engine components may be necessary.

6. Reassemble and Reconnect

• Reinstall the spark plug and coil.
• Ensure all connectors and wires are properly secured.
• Reconnect the battery.