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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Spark Plug

• Remove the engine cover (if applicable) using a socket set.
• Using a ratchet and socket, remove the spark plug from cylinder 1.
• Inspect the old spark plug: if worn or fouled, replace it with a new spark plug (OEM recommended).
• Torque the new spark plug to the manufacturer’s specification (typically around 13-16 lb-ft).

3. Inspect and Replace Ignition Coil

• Locate the ignition coil for cylinder 1.
• Disconnect the electrical connector from the ignition coil.
• Remove the bolt(s) securing the ignition coil and carefully pull it out.
• Replace with a new ignition coil (OEM recommended).
• Reconnect the electrical connector and ensure it clicks into place.

4. Clean or Replace Fuel Injector

• If a clogged fuel injector is suspected, remove the fuel rail as per manufacturer instructions.
• Disconnect the fuel lines carefully and relieve fuel pressure before removal.
• Remove the fuel injector for cylinder 1 from the fuel rail.
• Clean the fuel injector using an ultrasonic cleaner or replace it with a new one if damaged.
• Reinstall the injector and fuel rail, ensuring all connections are secure.

5. Test Compression

• If misfire persists, perform a compression test on cylinder 1.
• Remove the spark plug and connect the compression gauge to the spark plug hole.
• Crank the engine to get a reading. Compare to specifications (typically around 180-220 psi).
• If compression is low, further investigation into valve issues or head gasket may be required.