how to fix a Honda Pilot YF4 (2023-Present) with a misfire code P0301?

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to avoid electrical shorts.
• Allow the engine to cool down before starting work.

2. Inspect and Replace Spark Plug

• Remove Engine Cover (if applicable):
  • Use a socket set to remove any bolts securing the engine cover.
• Access Spark Plug:
  • Remove the ignition coil on cylinder 1 by unscrewing the mounting bolts and disconnecting the electrical connector.
• Remove Spark Plug:
  • Use a spark plug socket and ratchet to carefully unscrew and remove the spark plug from cylinder 1.
• Inspect Spark Plug:
  • Check for signs of wear, fouling, or damage. Replace if necessary with a manufacturer-specified spark plug.

3. Inspect and Replace Ignition Coil

• Remove Ignition Coil:
  • If the ignition coil is faulty, replace it by removing the screws and disconnecting the wiring harness.
• Install New Ignition Coil:
  • Place the new ignition coil into position and secure it using the screws. Reconnect the electrical connector.

4. Inspect and Replace Fuel Injector (if necessary)

• Remove Fuel Injector:
  • Disconnect the fuel rail and carefully remove the fuel injector for cylinder 1.
• Install New Fuel Injector:
  • Apply a small amount of engine oil to the O-ring of the new fuel injector.
  • Install the new injector into the fuel rail and secure it properly.

5. Reassemble and Reconnect

• Reinstall the ignition coil and engine cover (if removed).
• Reconnect the negative battery terminal.