how to fix the P0301 code on my Ford F-150 12th Generation (2009-2014)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the battery by removing the negative terminal to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the ignition coil from cylinder 1.
• Use the spark plug socket to remove the spark plug.
• Inspect the spark plug for wear, fouling, or damage; replace if necessary.
• Install the new spark plug with a gap set to manufacturer specifications (typically 0.054 inches for Ford).
• Torque the spark plug to manufacturer's specifications (usually around 13-15 lb-ft).

3. Check and Replace Ignition Coil

• Tools Required: Socket set
• If the spark plug is in good condition, check the ignition coil.
• Swap the ignition coil with another cylinder (e.g., cylinder 2).
• Clear the error codes and start the engine to see if the misfire follows the coil. If it does, replace the ignition coil.
• Install the new ignition coil and reconnect the electrical connector.

4. Inspect Fuel Injector

• Tools Required: Fuel injector cleaning kit or noid light
• If the problem persists, check the fuel injector for cylinder 1.
• Use a noid light to test for signal at the injector connector. If no signal, check wiring and ECM.
• If the injector is faulty, remove it using the appropriate socket and replace it with a new one.
• Reinstall the injector and reconnect all harnesses.

5. Compression Test

• Tools Required: Compression tester
• If all else fails, perform a compression test to check for internal engine issues.
• Remove the spark plug from cylinder 1 and install the compression tester.
• Crank the engine and record the compression reading. Compare it to the specifications (usually around 120-150 psi).
• If compression is low, further diagnostic procedures may be needed to identify the cause.