why does my Toyota Camry have a check engine light with code P0302

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool down before starting work.

2. Inspect and Replace Spark Plug

• Remove the ignition coil from cylinder 2.
  • Tools Required: Socket set, ratchet.
• Remove the spark plug using a spark plug socket.
  • Inspect for wear or oil fouling.
  • Replace with a new spark plug if necessary, ensuring proper gap according to manufacturer specifications (typically around 0.043 inches for a Toyota Camry).
• Reinstall the ignition coil securely.

3. Inspect and Replace Ignition Coil (if necessary)

• If the ignition coil shows signs of failure (cracks, corrosion), remove it from the cylinder.
  • Tools Required: Socket set.
• Install a new ignition coil, ensuring it is securely seated and connected.
• Reattach any connectors and ensure proper wiring.

4. Check Fuel Injector Functionality

• If misfire persists, use a fuel injector cleaning kit or replace the fuel injector for cylinder 2.
  • Tools Required: Injector puller (if needed), fuel injector cleaning kit.
• Reinstall the injector and ensure all connections are secure.

5. Perform Compression Test (if needed)

• If all else fails, perform a compression test on cylinder 2.
  • Tools Required: Compression tester.
• Compare the readings to the manufacturer's specifications. If low, further engine diagnostics may be required.