how to fix P0302 misfire code in Honda Accord Eleventh Generation (2023-present)

Solution

1. Preparation

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

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the ignition coil from cylinder 2:
  1. Unplug the electrical connector.
  2. Remove the mounting bolts using a socket.
• Remove the spark plug:
  1. Use a spark plug socket to carefully unscrew the spark plug.
  2. Inspect for wear or damage; replace if necessary (OEM specifications advised).
• Install the new spark plug:
  1. Hand-tighten the spark plug, then torque to specification (typically around 13 lb-ft).
  2. Reinstall the ignition coil and reconnect the electrical connector.

3. Inspect and Replace Ignition Coil

• If the spark plug is in good condition, inspect the ignition coil:
  1. If it appears damaged or corroded, replace it with an OEM ignition coil.
  2. Follow the same removal steps as above, ensuring proper installation of the new coil.

4. Check Fuel Injector

• If misfire persists, inspect the fuel injector for cylinder 2:
  1. Disconnect the fuel injector connector.
  2. Perform a resistance test using a multimeter to ensure it is within specifications (typically around 12-16 ohms).
  3. If out of spec, replace the fuel injector.
• Reconnect the fuel injector and ensure all connections are tight.

5. Reconnect Battery and Clear Codes

• Reconnect the battery negative terminal.
• Use the OBD-II scanner to clear the P0302 code from the system.