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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to ensure safety.

2. Inspect and Replace Spark Plug

1. Remove the engine cover if applicable.
2. Use a socket wrench to remove the spark plug from cylinder 2.
3. Inspect the spark plug for wear or damage. If it appears worn, replace it with a new spark plug specified for your RAV4 (e.g., NGK or Denso).
4. Torque the new spark plug to the manufacturer's specification (typically 13-16 lb-ft).

3. Inspect and Replace Ignition Coil

1. Disconnect the electrical connector from the ignition coil on cylinder 2.
2. Remove the mounting bolts securing the ignition coil.
3. Carefully pull the ignition coil out of the spark plug tube.
4. Install a new ignition coil, ensuring it is seated properly.
5. Reconnect the electrical connector and secure with bolts to the specified torque.

4. Check Fuel Injector

1. Remove the fuel rail cover if necessary to access the fuel injectors.
2. Disconnect the electrical connector from the fuel injector for cylinder 2.
3. Use a multimeter to test for resistance; compare with specifications (typically 12-16 ohms).
4. If faulty, replace the injector with a new one designed for your RAV4.
5. Reconnect the fuel injector and ensure the fuel rail is securely mounted.

5. Perform Compression Test

1. Remove the spark plug from cylinder 2 again.
2. Insert a compression gauge into the spark plug hole.
3. Crank the engine and record the compression reading. Compare it to the manufacturer's specifications (typically around 180-200 psi).
4. If the compression is low, further investigation is required (e.g., valve seal, head gasket).

6. Reassemble and Test

1. Reinstall any components removed during the procedure, including engine cover.
2. Reconnect the negative battery terminal.
3. Start the engine and check for any abnormal sounds or additional warning lights.