how to fix P0301 misfire code on Honda Pilot YF3 (2016-2022)

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the negative battery terminal to ensure safety while working on electrical components.

2. Inspect and Replace Spark Plug

• Remove the engine cover (if applicable).
• Using a socket set, remove the spark plug wire or ignition coil from cylinder 1.
• Use a spark plug socket to remove the spark plug from cylinder 1.
• Inspect the old spark plug for wear, fouling, or damage.
• If necessary, replace with a new spark plug (OEM recommended specifications).
• Torque the new spark plug to 13 lb-ft (17.6 Nm).

3. Inspect and Replace Ignition Coil

• If the spark plug inspection reveals no issues, check the ignition coil.
• Remove the ignition coil from cylinder 1 by unscrewing the mounting bolts.
• Inspect the ignition coil for cracks or damage.
• Replace with a new ignition coil if defects are found.
• Reconnect the ignition coil and secure it with the mounting bolts, torquing to manufacturer specifications.

4. Fuel Injector Cleaning/Replacement

• If spark plugs and ignition coils are fine, proceed to inspect the fuel injector.
• Disconnect the fuel injector connector and remove the fuel rail if necessary.
• Remove the fuel injector from cylinder 1.
• Clean the injector using a specialized fuel injector cleaner or replace it with a new one if it is clogged or defective.
• Reinstall the injector and ensure proper seating and connection.

5. Check for Vacuum Leaks

• Inspect all vacuum hoses and the intake manifold for any signs of wear or leaks.
• Use a smoke machine or spray carburetor cleaner around suspected areas while the engine is running to identify leaks.
• Replace any damaged hoses or seals as needed.

6. Reassemble and Reconnect Battery

• Reinstall any components that were removed during inspection and repair.
• Reconnect the negative battery terminal.
• Start the engine and allow it to idle.