why does my Toyota RAV4 XA40 (2013-2018) have a misfire code P0302

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal for safety.
• Allow the engine to cool down before starting work.

2. Replace Spark Plug

• Remove the ignition coil from cylinder 2.
• Unplug the electrical connector from the ignition coil.
• Use a spark plug socket to remove the spark plug from cylinder 2.
• Install the new spark plug, ensuring it is gapped correctly (typically 0.043 inches for the RAV4).
• Torque the spark plug to the manufacturer’s specification (approximately 13 lb-ft).

3. Inspect and Replace Ignition Coil

• After replacing the spark plug, visually inspect the ignition coil for cracks or damage.
• If necessary, remove the ignition coil from cylinder 2 (unplug the connector and unbolt it).
• Install a new ignition coil, securing it in place and reconnecting the electrical connector.

4. Check Fuel Injector

• Disconnect the fuel injector connector for cylinder 2.
• Remove the fuel injector (may require rail removal, depending on access).
• Inspect and clean the fuel injector or replace it if clogged.
• Reinstall the fuel injector and reconnect the connector.

5. Reassemble and Reset

• Reconnect the negative battery terminal.
• Start the engine and allow it to idle.
• Use the OBD-II scanner to clear the trouble codes.