how to fix a misfire in Toyota RAV4 XA50 (2019-2024) with code P0302

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the battery to ensure safety while working on the electrical components.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil from cylinder 2.
• Remove the spark plug using the spark plug socket.
• Inspect the spark plug for wear or damage; replace if necessary.
• Install the new spark plug and torque it to the manufacturer's specifications (typically around 13-15 lb-ft).
• Reinstall the ignition coil.

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set, multimeter.
• If the ignition coil is faulty, disconnect the wiring harness and remove the ignition coil from cylinder 2.
• Test the ignition coil’s resistance using a multimeter and compare with specifications.
• Replace the ignition coil if it is out of range.
• Install the new ignition coil securely and reconnect the wiring harness.

4. Clean or Replace Fuel Injector

• Tools Required: Fuel injector cleaning kit or replacement injector, basic hand tools.
• If the fuel injector is suspected to be clogged, remove it from cylinder 2.
• Use a fuel injector cleaning kit to clean the injector, or replace it with a new injector if necessary.
• Ensure all O-rings are lubricated and correctly seated when re-installing the injector.

5. Reassemble and Check

• Safety Warnings: Ensure all tools are removed from the engine bay before re-connecting the battery.
• Reconnect the battery.
• Start the engine and allow it to reach operating temperature.