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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery cable to prevent electrical shock.
• Allow the engine to cool completely before starting work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease.
• Remove the ignition coil from cylinder 1 by unbolting it and disconnecting the electrical connector.
• Remove the spark plug using the spark plug socket.
• Inspect the spark plug for wear; if it is fouled or damaged, replace it with a new spark plug of the correct type and gap according to manufacturer specifications.
• Apply dielectric grease to the ignition coil connection before reinstalling it.

3. Check and Replace Ignition Coil

• Tools Required: Socket set, torque wrench.
• If the spark plug is in good condition, test the ignition coil for proper operation using a multimeter.
• If the coil is faulty, remove it and replace it with a new ignition coil designed for your Honda Pilot.
• Reinstall the ignition coil and ensure it is secured properly.

4. Inspect and Clean Fuel Injector

• Tools Required: Fuel injector cleaning kit (if available).
• Disconnect the fuel injector electrical connector.
• Remove the fuel injector from cylinder 1 by unscrewing the retaining bolts.
• Clean the injector using a fuel injector cleaning kit or replace it if clogged or damaged.
• Reinstall the fuel injector and reconnect the electrical connector.

5. Test for Vacuum Leaks

• Inspect all vacuum hoses connected to the intake manifold for cracks or disconnections.
• Spray a small amount of brake cleaner or carburetor cleaner around the intake manifold while the engine is running; if the RPM changes, there is a vacuum leak that needs to be repaired.