how to fix P0301 misfire code in Honda Pilot Third Generation (2016-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool completely before starting work.

2. Replace Spark Plug

• Remove the ignition coil from cylinder 1:
  • Unscrew the mounting bolts with a socket set.
  • Disconnect the electrical connector.
• Remove the old spark plug using a spark plug socket.
• Inspect the new spark plug gap and adjust to specifications (usually 0.043 inches).
• Install the new spark plug and torque to manufacturer specifications (typically around 13 lb-ft).
• Reattach the ignition coil and reconnect the electrical connector.

3. Inspect/Replace Ignition Coil (if necessary)

• If the ignition coil was found faulty during diagnostics, replace it:
  • Remove the faulty ignition coil as described above.
  • Install the new ignition coil and ensure it is seated properly.
  • Reconnect the electrical connector.

4. Clean/Replace Fuel Injector (if necessary)

• If the fuel injector was diagnosed as faulty, remove it:
  • Disconnect the fuel injector electrical connector.
  • Remove the fuel rail to access the injector.
  • Replace the old injector with a new one, ensuring proper orientation and sealing.
• Reinstall the fuel rail and reconnect all connectors.

5. Final Checks

• Reconnect the negative battery terminal.
• Clear the error codes using an OBD-II scanner.
• Start the engine and let it run for a few minutes to check for leaks and proper operation.