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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shocks.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil cover if necessary.
• Using the spark plug socket, carefully remove the spark plug from cylinder 1.
• Inspect the spark plug for signs of wear or fouling. Replace it if necessary with a new spark plug, ensuring it matches OEM specifications.
• Torque the spark plug to the manufacturer's specification (typically around 13 lb-ft for Honda).

3. Check and Replace Ignition Coil

• Tools Required: Socket set, multimeter (optional).
• Remove the ignition coil from cylinder 1 by disconnecting the electrical connector and unbolting it.
• Inspect the ignition coil for cracks or damage. Use a multimeter to test the coil's resistance if needed.
• Replace the ignition coil with a new one if it shows signs of failure or is out of specification.
• Reinstall the ignition coil and reconnect the electrical connector.

4. Inspect and Clean Fuel Injector

• Tools Required: Fuel injector cleaner, socket set.
• Remove the fuel rail if necessary, following all safety precautions for fuel handling.
• Disconnect the fuel injector from its connector and remove it from the fuel rail.
• Clean the fuel injector using a fuel injector cleaner or replace it if clogged or not functioning properly.
• Reinstall the fuel injector and ensure it is seated properly in the fuel rail.

5. Final Assembly and Battery Reconnection

• Reassemble any components removed, ensuring all connectors and bolts are secure.
• Reconnect the negative battery terminal.
• Start the engine and allow it to idle to ensure proper operation.