how to fix P0302 misfire code on Toyota RAV4 XA50 (2019-2024)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to avoid electrical shorts.
• Allow engine to cool before starting work.

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 set (usually 10mm).
  4. Remove the spark plug using a spark plug socket.
  5. Inspect the spark plug for wear or damage. Replace if necessary.
  6. Install a new spark plug and torque to the manufacturer’s specification (typically 13 lb-ft or 18 Nm).
  7. Reinstall the ignition coil and reconnect the electrical connector.

3. Inspect and Replace Ignition Coil

• Sub-steps:
  1. If the spark plug is in good condition, proceed to inspect the ignition coil.
  2. Check for cracks or damage on the ignition coil.
  3. If necessary, replace the ignition coil with a new one.
  4. Reinstall the ignition coil and reconnect the connector.

4. Check and Replace Fuel Injector

• Sub-steps:
  1. Disconnect the fuel injector connector for cylinder 2.
  2. Use a noid light to check for power at the injector connector when the engine is cranking.
  3. If no power is detected, check the wiring for continuity and replace wiring if needed.
  4. If power is present, remove the fuel injector.
  5. Clean or replace the injector as necessary.
  6. Reinstall the fuel injector and reconnect the electrical connector.

5. Compression Test

• Sub-steps:
  1. Remove the spark plug from cylinder 2.
  2. Insert a compression tester into the spark plug hole.
  3. Crank the engine to obtain a reading.
  4. Compare the reading to the manufacturer’s specifications (usually around 180 psi for a healthy engine).
  5. If compression is low, further investigation may be needed (valve issues, head gasket).