how do I fix the P0301 misfire code in my Honda Pilot YF3 (2016-2022)?

Solution

1. Preparation

• Gather tools and parts needed for repair.
• Ensure the vehicle is parked on a level surface, and the engine is cool.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Remove the ignition coil cover if applicable.
• Disconnect the electrical connector from the ignition coil.
• Remove the ignition coil using a socket set.
• Check the spark plug for damage or excessive wear; replace if necessary.
  • Tools Required: Socket set, spark plug socket.
  • Parts Required: New spark plug (specific to Honda Pilot), new ignition coil (if faulty).

3. Inspect and Replace Ignition Coil

• If the spark plug is in good condition, inspect the ignition coil.
• Replace the ignition coil if it shows signs of damage or malfunction.
• Reinstall the ignition coil and reconnect the electrical connector.
• Tools Required: Torque wrench.
• Ensure the ignition coil is torqued to manufacturer's specifications (approximately 7.2 lb-ft).

4. Test Fuel Injector

• Attach a noid light to the fuel injector connector for cylinder 1.
• Crank the engine and check for light operation to ensure the injector is receiving a signal.
• If the noid light does not illuminate, inspect the wiring and ECM signal.
• Replace the injector if it is faulty.
• Tools Required: Noid light, multimeter.

5. Check for Vacuum Leaks

• Inspect all vacuum hoses connected to the intake manifold for cracks or disconnections.
• Spray a small amount of carburetor cleaner around the intake manifold gaskets while the engine is running; a change in RPM indicates a vacuum leak.
• Repair or replace any damaged hoses or gaskets.