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

Solution

1. Preparation

• Gather tools: OBD-II scanner, socket set, compression tester, multimeter, fuel injector tester, and torque wrench.
• Ensure the vehicle is parked on a level surface, and the engine is off and cool.

2. Replace Spark Plug

• Remove the engine cover if necessary.
• Disconnect the ignition coil connector and remove the ignition coil bolt.
• Carefully pull the ignition coil out of the cylinder head.
• Remove the spark plug using a spark plug socket.
• Inspect the spark plug for wear; replace if worn or fouled.
• Install a new spark plug, tightening to the manufacturer's specified torque (typically around 13 lb-ft).
• Reinstall the ignition coil and connector securely.

3. Inspect and Replace Ignition Coil

• If the ignition coil appears damaged or was previously replaced, test it with a multimeter to check for proper resistance.
• Replace the ignition coil if it fails the resistance test.
• Reinstall the ignition coil using the correct torque specifications.

4. Check for Vacuum Leaks

• Inspect vacuum hoses and connections around the intake manifold for cracks or disconnections.
• Use a smoke tester if available to identify hard-to-find leaks.
• Repair any leaks found by replacing damaged hoses or resealing connections.

5. Test Fuel Injector

• Disconnect the fuel injector connector.
• Use a fuel injector tester to check for proper operation and spray pattern.
• If the injector is faulty, replace it with a new one, ensuring it is properly seated and connected.