how to resolve P0301 code in Ford F-150 12th Generation (2009-2014)

Solution

1. Preparation

• Gather tools and materials.
• Ensure the vehicle is parked on a flat surface, and the engine is cool.
• Disconnect the negative battery terminal.

2. Replace Spark Plug

• Tools Required: Ratchet and socket set, spark plug gap tool.
• Remove the ignition coil from cylinder 1 by unscrewing the mounting bolt and disconnecting the electrical connector.
• Unscrew the old spark plug using a spark plug socket.
• Inspect the new spark plug for proper gap according to the manufacturer's specifications (typically 0.054 inches for Ford engines).
• Install the new spark plug and torque it to the manufacturer's specification (usually around 13 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Test Ignition Coil

• If the spark plug replacement does not resolve the issue, swap the ignition coil from cylinder 1 with another cylinder.
• Clear the fault codes using the OBD-II scanner and start the engine.
• Observe if the misfire moves to the cylinder where the ignition coil was relocated. If it does, replace the ignition coil.

4. Inspect and Clean Fuel Injector

• Tools Required: Fuel injector cleaner kit (if necessary).
• Remove the fuel injector from cylinder 1 by disconnecting the electrical connector and unscrewing the retaining bolts.
• Inspect the injector for clogs and clean it with a fuel injector cleaning kit if needed.
• Reinstall the injector and ensure all connections are secure.

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.
• Crank the engine and record the compression reading. Compare it to the manufacturer's specifications (usually around 120-150 psi).
• If the compression is low, further inspection of the engine internals may be necessary.