how to troubleshoot the P0301 code on my Ford F-150 13th Generation (2015-2020)

Solution

1. Preparation

• Gather tools and parts required.
• Ensure the vehicle is parked on a level surface, and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Ignition Components

• Spark Plug Inspection:

  • Remove the spark plug from cylinder 1 using a socket set (typically 5/8" or 13/16" socket).
  • Inspect for wear, fouling, or damage; replace if necessary with OEM spark plug.
  • Torque new spark plug to manufacturer specification (usually around 13-15 lb-ft).

• Ignition Coil Inspection:

  • Disconnect the ignition coil connector and unscrew the coil from the cylinder head.
  • Inspect for cracks or carbon tracking; replace if defective.
  • Install the new ignition coil and torque to manufacturer specifications (typically 7-11 lb-ft).

3. Fuel Injector Testing and Replacement (if necessary)

• Injector Testing:

  • Use a noid light to check for electrical signal to the fuel injector.
  • If no signal, trace wiring and connectors for faults.

• Injector Replacement:

  • If faulty, remove the fuel rail to access the injector.
  • Disconnect the fuel line (use a line wrench) and electrical connector from the injector.
  • Remove the old injector and replace it with a new one, ensuring proper sealing with O-rings.
  • Reinstall the fuel rail and reconnect the fuel line and electrical connectors.

4. Compression Test (if misfire persists)

• Remove the spark plug and crank the engine to take a compression reading.
• Compare readings with manufacturer specifications (usually around 120-150 psi).
• If low, further investigation may be required (e.g., valve issues, head gasket failure).

5. Reassembly and Reconnection

• Reinstall any components that were removed during inspection or replacement.
• Reconnect the negative battery terminal.
• Ensure all fasteners are torqued to specifications.