my Ford F-150 13th Generation (2015-2020) has a check engine code P0305, what does it mean?

Learn how to diagnose and fix P0305 cylinder 5 misfire in Ford F-150. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Replace Spark Plug

• Sub-steps:
  • Remove the engine cover if equipped.
  • Locate the spark plug for cylinder 5 (usually the second cylinder on the passenger side).
  • Use a spark plug socket and ratchet to unscrew the spark plug.
  • Inspect the spark plug for wear or damage, replace if necessary.
  • Gap the new spark plug to the manufacturer specifications (typically around 0.028-0.060 inches).
  • Install the new spark plug and torque to recommended specifications (usually around 13-15 lb-ft).

3. Inspect and Replace Ignition Coil

• Sub-steps:
  • Unplug the electrical connector from the ignition coil for cylinder 5.
  • Remove the mounting bolts securing the ignition coil.
  • Replace the ignition coil with a new one and secure it with bolts, torquing them to specifications (typically 7-10 lb-ft).
  • Reconnect the electrical connector.

4. Inspect and Replace Fuel Injector

• Sub-steps:
  • Disconnect the fuel line and relieve fuel pressure before removing the injector.
  • Remove the bolts or clips securing the fuel rail and carefully pull it away.
  • Take out the fuel injector for cylinder 5, replacing it with a new one.
  • Ensure the new injector is seated properly and reconnect the fuel rail securely.

5. Reconnect Battery and Test

• Reconnect the battery.
• Start the engine and allow it to idle to ensure that the check engine light does not reappear and that the engine runs smoothly.