how to diagnose P0302 code in my Toyota Camry XV70 (2018-2024)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety.
• Allow the engine to cool before starting work.

2. Inspect and Replace Spark Plug

• Remove the engine cover if necessary.
• Disconnect the ignition coil connector from cylinder 2.
• Remove the ignition coil using a socket set (typically 10mm).
• Extract the spark plug from cylinder 2 with a spark plug socket.
• Inspect the spark plug for fouling or wear. Replace if necessary (specifications: NGK or Denso plug recommended).
• Reinstall the spark plug and ignition coil, ensuring proper torque (typically 13 lb-ft for spark plugs).

3. Check and Replace Ignition Coil

• If the spark plug is in good condition, test the ignition coil with a multimeter (check primary and secondary resistance).
• If the ignition coil is faulty, replace it with an OEM or quality aftermarket part.
• Reconnect the ignition coil and ensure it is seated properly.

4. Inspect and Clean Fuel Injector

• Disconnect the fuel injector connector for cylinder 2.
• Remove the fuel injector using a fuel injector puller if necessary.
• Inspect the injector for clogs or damage. Clean with an appropriate cleaner or replace if needed.
• Reinstall the fuel injector, ensuring proper seating and connection.

5. Conduct Compression Test

• Remove the spark plug from cylinder 2 to facilitate testing.
• Insert the compression gauge into the spark plug hole and crank the engine.
• Record the compression reading. Compare it to manufacturer specifications (typically 180-200 psi).
• If compression is low, further investigation into engine internals may be required.