why does my Ford F-150 12th Generation (2009-2014) have a check engine light with P0301?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Inspect and Replace Ignition Components

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the engine cover if applicable.
• Disconnect the electrical connector from the ignition coil of cylinder 1.
• Remove the ignition coil using the socket set.
• Inspect the spark plug for wear or damage; if necessary, replace it with a new one (use OEM specifications for the plug gap).
• Reinstall the ignition coil and reconnect the electrical connector.
• Torque the ignition coil to the manufacturer's specifications.

3. Check and Clean Fuel Injector

• Tools Required: Fuel injector cleaning kit or dedicated fuel injector tool
• Disconnect the fuel line to the injector and relieve any pressure according to the service manual.
• Remove the fuel injector from cylinder 1.
• Clean the injector using the cleaning kit or replace it if it’s faulty.
• Reinstall the fuel injector and reconnect the fuel line, ensuring no leaks.

4. Test Compression

• Tools Required: Compression tester
• Remove the spark plug from cylinder 1.
• Install the compression tester in the spark plug hole.
• Crank the engine to take a reading. Compare the compression value to the manufacturer's specifications.
• If compression is low, further investigation into internal engine issues may be necessary.

5. Reassemble and Reconnect Battery

• Reinstall any components removed during the repair.
• Reconnect the negative battery terminal.
• Ensure all tools are removed from the engine bay.