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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to avoid any electrical issues during repairs.
• Ensure the engine is cool before starting work.

2. Inspect and Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench.
• Remove the ignition coil from cylinder 1 by unscrewing the bolts and disconnecting the electrical connector.
• Remove the spark plug using the spark plug socket. Inspect it for wear or damage.
• Replace the spark plug with a new one, ensuring it is gapped correctly to manufacturer specifications. Torque to the specified value (typically around 13 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Check and Replace Ignition Coil (if necessary)

• If the spark plug inspection shows no issues, test the ignition coil for proper resistance values using a multimeter.
• If the coil is faulty, remove it and replace with a new ignition coil designed for the Honda Pilot.

4. Inspect and Replace Fuel Injector

• Tools Required: Fuel injector puller, ratchet set.
• Disconnect the fuel injector connector.
• Remove the fuel rail if required to access the fuel injector for cylinder 1.
• Replace the fuel injector with a new one, ensuring proper sealing and fitment.

5. Perform Compression Test (if misfire persists)

• Tools Required: Compression tester.
• Remove the spark plug and install the compression tester in cylinder 1.
• Crank the engine a few times to get a reading. Compare the pressure with specifications (should be around 180 psi).
• If compression is low, further engine diagnostics may be needed.