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

Solution

1. Preparation

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

2. Replace Spark Plug

• Remove the engine cover if necessary using a socket set.
• Using a spark plug socket, remove the spark plug from cylinder 1.
• Inspect the spark plug; if worn or fouled, install a new spark plug (use OEM specifications).
• Torque the new spark plug to the manufacturer's specified value (typically around 13 lb-ft).

3. Inspect and Replace Ignition Coil

• Locate the ignition coil for cylinder 1, usually found on top of the spark plug.
• Disconnect the electrical connector from the ignition coil.
• Remove the mounting bolts securing the ignition coil using a socket set.
• Install a new ignition coil, ensuring it is seated properly.
• Reconnect the electrical connector and ensure it clicks into place.

4. Check Fuel Injector

• Locate the fuel injector for cylinder 1.
• Disconnect the electrical connector from the fuel injector.
• Use a fuel pressure gauge to check the fuel pressure; it should be within the manufacturer's specifications.
• If the injector is clogged, consider cleaning it with a fuel injector cleaner or replace it if necessary.

5. Reconnect Battery and Test

• Reconnect the negative battery terminal securely.
• Start the engine and allow it to reach operating temperature.
• Monitor for any check engine light reactivation.