how to fix P0302 code in Toyota RAV4 Fourth Generation (2013-2018)

Solution

1. Preparation

• Gather all tools and parts required for repair.
• Ensure the vehicle is parked on a flat surface, and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Inspect and Replace Spark Plug

• Sub-steps:
  • Remove the engine cover if applicable.
  • Disconnect the ignition coil connector and remove the ignition coil from cylinder 2.
  • Remove the spark plug using a spark plug socket and ratchet.
  • Inspect the spark plug for wear, carbon buildup, or damage.
  • Replace with a new spark plug (recommended type: NGK or Denso, gapped to manufacturer specifications).
• Tools Required: Spark plug socket, ratchet, torque wrench.

3. Inspect and Replace Ignition Coil

• Sub-steps:
  • If the spark plug is in good condition, test or replace the ignition coil.
  • Install the new ignition coil onto the spark plug.
  • Reconnect the ignition coil connector.
  • If swapping coils for testing, replace the original coil back to its position after testing.
• Tools Required: Ratchet, torque wrench.

4. Test Fuel Injector

• Sub-steps:
  • Disconnect the fuel injector connector for cylinder 2.
  • Use a noid light to check for electrical signal or use a multimeter to measure resistance.
  • If the injector is faulty, replace it with a new component.
• Tools Required: Noid light or multimeter, ratchet.

5. Reassemble and Clear Codes

• Sub-steps:
  • Reinstall any components removed during the repair (engine cover, etc.).
  • Reconnect the negative battery terminal.
  • Use an OBD-II scanner to clear the P0302 code from the system.
• Tools Required: OBD-II scanner.