what does P0302 code mean for my Toyota Corolla E210 (2019-2024)?

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shock.
• Ensure the engine is cool before proceeding.

2. Replace Spark Plug and Ignition Coil (if needed)

• Tools Required: Socket set, torque wrench, spark plug socket, ratchet.
• Remove the engine cover if applicable.
• Unplug the ignition coil connector for cylinder 2.
• Remove the ignition coil by unscrewing the mounting bolts.
• Inspect the spark plug; if it shows signs of wear or fouling, remove it using a spark plug socket.
• Install a new spark plug, tightening it to the manufacturer’s specified torque (usually around 13-15 lb-ft).
• Install a new ignition coil if necessary and secure it using the bolts. Reconnect the ignition coil connector.

3. Clean or Replace Fuel Injector (if needed)

• Tools Required: Fuel injector removal tool, cleaner, safety goggles.
• Depressurize the fuel system by removing the fuel pump relay and starting the engine until it stalls.
• Disconnect the fuel line and electrical connector from the injector for cylinder 2.
• Remove the injector using a fuel injector removal tool.
• Clean the injector using an ultrasonic cleaner or replace it with a new one if cleaning is ineffective.
• Reinstall the fuel injector, reconnect the fuel line, and electrical connector.

4. Perform Compression Test

• Tools Required: Compression tester.
• Remove the spark plug for cylinder 2.
• Insert the compression tester into the spark plug hole.
• Crank the engine to obtain a reading. Compare the results to the manufacturer’s specifications.
• If compression is low, further investigation into valve integrity or piston condition is needed.

5. Check for Vacuum Leaks

• Inspect hoses and gaskets around the intake manifold visually and by feel.
• Spray a small amount of carburetor cleaner around suspected areas while the engine is running; if idle changes, there is a vacuum leak.
• Replace any damaged hoses or gaskets found during inspection.