how to fix P0302 code in Toyota Corolla E210 (2019-2024)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the vehicle is parked on a level surface and the engine is cool.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, gap gauge
• Remove the engine cover (if applicable).
• Disconnect the ignition coil connector and remove the ignition coil from cylinder 2.
• Remove the spark plug using a spark plug socket.
• Inspect the spark plug for wear or damage. If worn, replace it with a new spark plug.
• Use a gap gauge to ensure the new spark plug is gapped correctly (typically 0.043 inches for most Toyota models).
• Reinstall the spark plug and torque it to the manufacturer's specifications (usually around 13 lb-ft).
• Reinstall the ignition coil and reconnect the connector.

3. Inspect and Replace Fuel Injector

• Tools Required: Fuel injector removal tool, torque wrench
• Disconnect the fuel injector connector and remove the fuel rail (if necessary).
• Remove the fuel injector from cylinder 2.
• Inspect the injector for clogs or leaks. Clean or replace it if necessary.
• Reinstall the fuel injector and torque it to manufacturer's specifications (commonly around 10-15 lb-ft).
• Reattach the fuel rail and reconnect the fuel injector connector.

4. Check Ignition Coil

• Tools Required: Multimeter
• Test the ignition coil for proper resistance using a multimeter.
• If the resistance is out of specification, replace the ignition coil with a new one.
• Reinstall the ignition coil on cylinder 2 and reconnect the connector.

5. Clear Codes and Test Drive

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0302 code.
• Start the engine and observe for any abnormalities.
• Test drive the vehicle to ensure proper operation and confirm that the check engine light does not reappear.