how to fix a P0302 code on my Toyota Corolla E210 (2019-2024)

Solution

1. Preparation

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

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil from cylinder 2.
• Remove the spark plug using a spark plug socket.
• Inspect the spark plug for wear, carbon buildup, or damage.
• If necessary, replace the spark plug with a new one, ensuring it is gapped to the manufacturer's specifications (usually around 0.043 inches).
• Reinstall the ignition coil onto the spark plug.

3. Check and Replace Ignition Coil

• Tools Required: Socket set.
• If the spark plug is in good condition, inspect and test the ignition coil for cylinder 2.
• If defective, remove the ignition coil and replace it with a new one.
• Ensure proper seating and connection.

4. Inspect and Replace Fuel Injector

• Tools Required: Fuel injector puller, socket set.
• Disconnect the fuel injector connector and remove the fuel rail if necessary.
• Remove the fuel injector for cylinder 2.
• Inspect the injector for clogs or damage.
• If needed, replace the fuel injector with a new unit, ensuring that O-rings are lubricated and properly seated.

5. Final Assembly

• Reconnect all wiring and connectors related to the ignition coil and fuel injector.
• Reinstall any components that were removed during the process.
• Reconnect the negative battery terminal.