my Toyota RAV4 has a check engine light with code P0302 what does it mean

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface, and the engine is cool.
• Disconnect the battery negative terminal for safety.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover (if applicable) using a socket set.
  2. Disconnect the ignition coil connector on cylinder 2.
  3. Remove the ignition coil using a wrench or socket.
  4. Remove the spark plug using a spark plug socket.
  5. Inspect the spark plug for wear, fouling, or damage. Replace if necessary (use OEM specifications for type and gap).
  6. Install the new spark plug, ensuring proper torque (typically 13-15 lb-ft).

3. Inspect and Replace Ignition Coil

• Sub-steps:
  1. If the spark plug is in good condition but the misfire persists, replace the ignition coil for cylinder 2.
  2. Install the new ignition coil, ensuring it is seated properly.
  3. Reconnect the ignition coil connector.

4. Check Fuel Injector

• Sub-steps:
  1. Disconnect the fuel injector connector for cylinder 2.
  2. Use a multimeter to test for resistance; compare with manufacturer specifications.
  3. If faulty, replace the fuel injector.
  4. Reconnect the injector and ensure it is seated correctly.

5. Reconnect Battery and Clear Codes

• Reconnect the battery negative terminal.
• Use the OBD-II scanner to clear the P0302 code from the computer.