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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to ensure safety while working on electrical components.

2. Replace Spark Plug

• Tools Required: Socket set, spark plug socket, torque wrench.
• Remove the engine cover if applicable.
• Carefully disconnect the ignition coil connector and remove the ignition coil from cylinder 2.
• Remove the old spark plug using a spark plug socket.
• Install the new spark plug hand-tight, then torque to the manufacturer’s specification (typically around 13 lb-ft).
• Reinstall the ignition coil and reconnect the connector.

3. Inspect/Replace Ignition Coil

• If the spark plug replacement does not solve the issue, inspect the ignition coil.
• Tools Required: Socket set, multimeter (for testing).
• Remove the ignition coil from cylinder 2.
• Test the ignition coil with a multimeter for resistance; replace if outside manufacturer specifications.
• Install a new ignition coil if necessary and reconnect it.

4. Fuel Injector Inspection/Replacement

• If ignition components are functioning properly, inspect the fuel injector.
• Tools Required: Fuel injector removal tool, socket set.
• Disconnect the fuel injector connector and remove the fuel rail if necessary.
• Remove the fuel injector for cylinder 2.
• Inspect and clean the injector, or replace it with a new one if it is faulty.
• Reinstall the fuel injector, ensuring proper sealing.

5. Compression Test (if needed)

• If misfire persists, perform a compression test.
• Tools Required: Compression tester.
• Remove spark plugs from all cylinders.
• Insert the compression tester into cylinder 2 and crank the engine.
• Compare the compression readings to manufacturer specifications; replace engine components if readings are low.