how to resolve P0302 code in my Toyota Corolla E210 (2019-2024)?

Solution

1. Preparation

• Gather tools and materials.
• Disconnect the battery to prevent electrical shorts.
• Ensure the vehicle is on a flat surface, and the ignition is off.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil from cylinder 2:
  1. Disconnect the electrical connector from the ignition coil.
  2. Remove the bolt securing the ignition coil using a socket wrench.
  3. Gently pull the ignition coil out of the spark plug well.
• Inspect the spark plug:
  1. Remove the old spark plug using a spark plug socket.
  2. Check for damage or excessive wear (e.g., worn electrode, carbon buildup).
• Install a new spark plug:
  1. Apply anti-seize compound to the threads of the new spark plug.
  2. Torque the spark plug to manufacturer specifications (typically around 13-15 ft-lbs).
  3. Reinstall the ignition coil and reconnect the electrical connector.

3. Inspect and Replace Ignition Coil (if needed)

• If the spark plug is fine, check the ignition coil:
  1. Swap the ignition coil from cylinder 2 with another cylinder to see if the misfire code follows.
  2. If it does, replace the ignition coil for cylinder 2.
• Install the new ignition coil:
  1. Secure it to the spark plug and bolt it down.
  2. Reconnect the electrical connector.

4. Fuel System Inspection

• Check the fuel injectors:
  1. Listen for injector operation using a mechanic's stethoscope or a similar tool.
  2. Use a fuel pressure gauge to ensure proper fuel pressure is reaching the injectors.
• If fuel delivery is insufficient, consider replacing the affected fuel injector.

5. Final Assembly

• Reconnect the battery.
• Clear the error codes using the OBD-II scanner.