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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the engine is cool before starting repairs.

2. Inspect and Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, extension
• Remove the ignition coil from cylinder 1.
  • Unplug the electrical connector and remove the bolt securing the coil.
• Remove the spark plug using the spark plug socket.
• Inspect the spark plug for wear or damage. Replace if necessary.
• Install the new spark plug, tightening it to the manufacturer's torque specification (typically around 13-15 ft-lbs for most spark plugs).

3. Check and Replace Ignition Coil

• Reinstall the ignition coil if the spark plug is good.
• If the ignition coil is suspected to be faulty, replace it:
  • Remove the old ignition coil.
  • Install the new coil and secure it with the bolt.
  • Reconnect the electrical connector.

4. Inspect and Replace Fuel Injector (if necessary)

• If misfire persists, check the fuel injector:
  • Disconnect the fuel injector connector.
  • Remove the fuel rail if needed to access the injector.
  • Replace the faulty fuel injector with a new one and reassemble.

5. Compression Test

• If issues persist after replacing the spark plug and ignition coil:
  • Remove the spark plug again and insert a compression gauge in cylinder 1.
  • Crank the engine and record the compression reading. Compare with manufacturer specifications (usually around 130-150 psi).
  • If readings are low, further investigation into engine internals may be needed.