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

Solution

1. Preparation

• Gather necessary tools including a socket set, torque wrench, compression tester, and multimeter.
• Ensure the vehicle is parked on a level surface and the engine is cool.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Disconnect the ignition coil connector for cylinder 2.
  3. Remove the ignition coil using a socket.
  4. Extract the spark plug from cylinder 2 using a spark plug socket.
  5. Inspect the spark plug for wear, carbon buildup, or damage. Replace with a new spark plug if necessary (OEM specifications).
  6. Reinstall the spark plug and ignition coil, ensuring proper torque (typically 13-15 lb-ft for spark plugs).

3. Test and Replace Ignition Coil

• Sub-steps:
  1. Using a multimeter, test the resistance of the ignition coil according to manufacturer specifications.
  2. If the coil is defective, remove it and replace with a new ignition coil (OEM part recommended).
  3. Reconnect the ignition coil and ensure all connections are secure.

4. Check and Clean Fuel Injector

• Sub-steps:
  1. Disconnect the fuel injector connector for cylinder 2.
  2. Use a noid light to check for injector pulse while cranking the engine.
  3. If the pulse is absent, further diagnose wiring or PCM issues; replace the injector if it is faulty.
  4. If the injector is operational but clogged, remove it and clean using a professional injector cleaner or replace it.

5. Compression Test

• Sub-steps:
  1. Remove the spark plug from cylinder 2 again for access.
  2. Insert the compression tester into the spark plug hole.
  3. Crank the engine several times and record the compression reading.
  4. Compare the reading with manufacturer specifications; replace any faulty components if compression is low.