how do I fix P0301 misfire code in Honda Pilot YF4 (2023-Present)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety while working on electrical components.
• Allow the engine to cool before starting any work.

2. Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench
• Remove the ignition coil from cylinder 1 by unscrewing the retaining bolts and disconnecting the electrical connector.
• Remove the spark plug using the spark plug socket. Inspect for wear or damage.
• Install the new spark plug by hand-tightening it, then use a torque wrench to tighten it to the manufacturer's specified torque (typically around 13 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Test Ignition Coil

• Tools Required: Multimeter
• Remove the ignition coil from cylinder 1 again.
• Test the ignition coil's primary and secondary resistance with a multimeter. Refer to the service manual for the specified resistance values.
• If the coil is defective, replace it with a new one, reconnecting the electrical connector and securing it in place.

4. Inspect and Replace Fuel Injector

• Tools Required: Fuel injector removal tool, socket set
• Disconnect the fuel line and the electrical connector from the fuel injector in cylinder 1.
• Remove the fuel injector using the appropriate tool.
• Inspect the injector for clogs or leaks. Clean or replace as necessary.
• Reinstall the fuel injector, ensuring it is seated properly, and reconnect the fuel line and electrical connector.

5. Compression Test

• Tools Required: Compression tester
• Remove the spark plug from cylinder 1 and attach the compression tester.
• Crank the engine and record the compression reading.
• Compare the result to the manufacturer's specifications. If low, further investigation into piston rings or valves may be necessary.