how to address P0301 misfire code in my Honda Pilot YF3 (2016-2022)?

Solution

1. Preparation

• Gather tools: OBD-II scanner, socket set, torque wrench, fuel pressure gauge, compression tester, multimeter.
• Disconnect the battery to ensure safety while working on electrical components.

2. Replace Spark Plug

1. Remove the engine cover (if applicable) to access the spark plug.
2. Disconnect the ignition coil connector from cylinder 1.
3. Remove the ignition coil bolt using a socket set and carefully pull out the ignition coil.
4. Unscrew the spark plug using a spark plug socket.
5. Inspect the old spark plug for wear and replace it with a new one, ensuring it is gapped correctly according to manufacturer specifications (typically around 0.044 inches).
6. Reinstall the ignition coil and secure it with the bolt.
7. Reconnect the ignition coil connector.

3. Replace Ignition Coil (if needed)

1. If the ignition coil appears damaged or faulty during inspection, remove the old ignition coil.
2. Install the new ignition coil in the same position.
3. Connect the ignition coil connector.

4. Check Fuel Injector

1. If fuel system issues are suspected, remove the fuel injector from cylinder 1 after taking necessary precautions (e.g., relieving fuel pressure).
2. Inspect the injector for clogs or electrical issues using a multimeter to test the resistance.
3. Clean or replace the fuel injector if it is found defective.

5. Reconnect Battery and Clear Codes

1. Reconnect the battery terminals.
2. Use the OBD-II scanner to clear the P0301 code from the engine control module.