how to fix the P0302 code on my Toyota Corolla E140 (2006-2013)

Solution

1. Preparation

• Gather tools and parts for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket, anti-seize compound.
• Remove the ignition coil from cylinder 2.
• Remove the spark plug using the spark plug socket.
• Inspect the spark plug for wear; replace it if necessary with a new one, ensuring to use the correct gap specifications.
• Apply anti-seize compound to the threads of the new spark plug.
• Install the new spark plug and torque it to manufacturer specifications (usually around 13 ft-lbs).

3. Test or Replace Ignition Coil

• Tools Required: Multimeter.
• If the spark plug is in good condition, test the ignition coil with a multimeter to check for proper resistance.
• If the coil fails the test, replace it with a new ignition coil for cylinder 2.

4. Clean or Replace Fuel Injector

• Tools Required: Fuel injector cleaning kit or replacement injector.
• If fuel delivery issues are suspected, remove the fuel injector for cylinder 2.
• Clean the injector using a fuel injector cleaning kit or replace it with a new injector if cleaning does not restore functionality.
• Reinstall the injector ensuring proper sealing.

5. Check Compression

• Tools Required: Compression tester.
• If misfire persists, perform a compression test on cylinder 2.
• If compression is low, further investigation into the engine's internal components may be required, such as the valves or piston rings.