how to fix P0301 misfire code on Honda Pilot Third Generation (2016-present)

Solution

1. Preparation

• Gather tools and parts. Ensure the engine is cool before starting.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Spark Plug

• Remove the ignition coil from cylinder 1.
• Unscrew the spark plug using a spark plug socket.
• Inspect the spark plug for wear; replace with a new spark plug (OEM recommended).
• Torque the new spark plug to manufacturer specifications (typically around 13-16 lb-ft).

3. Inspect and Replace Ignition Coil

• Inspect the ignition coil for cracks or signs of failure.
• If faulty, remove the ignition coil from cylinder 1.
• Install a new ignition coil and ensure it clicks into place securely.

4. Fuel Injector Inspection

• Disconnect the fuel injector connector for cylinder 1.
• Use a multimeter to test the injector for proper resistance (typically 12-16 ohms).
• If not within specifications, replace the fuel injector with a new one.
• Reconnect the fuel injector connector.

5. Compression Test

• If misfire persists, conduct a compression test on cylinder 1.
• If compression is below specifications (typically around 190-210 psi), further investigation is needed into valve or piston issues.
• Address any mechanical issues found during testing.

6. Reconnect Battery and Test

• Reconnect the negative battery terminal.
• Start the engine and allow it to idle. Observe for any check engine light re-illumination or misfire.