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

Solution

1. Preparation

• Gather necessary tools and equipment.
• Ensure the vehicle is on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Inspect and Replace Spark Plug

• Remove the engine cover if applicable.
• Locate and remove the ignition coil from cylinder 2.
  • Tools required: Socket set, ratchet
• Remove the spark plug using a spark plug socket.
  • Inspect the spark plug for signs of wear, carbon buildup, or damage.
  • If worn or damaged, replace with a new spark plug (specifying the OEM part).
  • Torque the new spark plug to the manufacturer's specifications (typically around 13 lb-ft).

3. Inspect and Replace Ignition Coil

• While the ignition coil is removed, inspect it for cracks or carbon tracking.
• If damaged, replace with a new ignition coil (ensure it matches the OEM specifications).
• Reinstall the ignition coil and ensure it is properly seated and connected.

4. Inspect Fuel Injector

• If the spark plug and ignition coil are in good condition, check the fuel injector for cylinder 2.
• Remove the fuel injector connector and check for continuity using a multimeter.
• If the injector is faulty, replace it with a new one (ensure OEM specifications).
• Reconnect the fuel injector connector.

5. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0302 code.
• Start the engine and monitor for any reoccurrence of the misfire.