my Toyota Corolla E140 (2006-2013) shows P0302 code, what does that mean?

Solution

1. Preparation

• Gather tools and parts needed.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool before beginning work.

2. Inspect and Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench.
• Remove the ignition coil and spark plug for cylinder 2.
• Inspect the spark plug for wear or damage; replace if necessary.
• Install the new spark plug and torque to the manufacturer's specifications (typically 13-16 lb-ft).

3. Check and Replace Ignition Coil

• Tools Required: Socket set.
• Remove the ignition coil from cylinder 2.
• Test the ignition coil with a multimeter to ensure it is operating within the specified resistance range.
• Replace with a new ignition coil if faulty.

4. Inspect and Clean Fuel Injector

• Tools Required: Fuel injector cleaning kit.
• Remove the fuel injector for cylinder 2.
• Clean the injector using a fuel injector cleaning kit or replace if clogged.
• Reinstall the injector, ensuring a proper seal.

5. Check for Vacuum Leaks

• Tools Required: Vacuum gauge or smoke machine.
• Inspect vacuum lines and intake manifold for leaks.
• Repair or replace any damaged hoses or seals.

6. Test Engine Compression

• Tools Required: Compression tester.
• Remove spark plugs and insert the compression tester into cylinder 2.
• Crank the engine and record the compression reading; it should be within the manufacturer's specified range.
• If compression is low, further investigation may be needed.