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

Solution

1. Preparation

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

2. Replace Spark Plug

• Remove the engine cover if applicable.
• Remove the ignition coil on cylinder 2:
  • Unplug the electrical connector.
  • Remove the mounting bolts using a socket set.
• Extract the spark plug using a spark plug socket:
  • Clean the area around the spark plug to prevent debris from entering the cylinder.
  • Carefully remove the old spark plug.
• Install the new spark plug:
  • Torque the new spark plug to 13 lb-ft (18 Nm).
• Reinstall the ignition coil and electrical connector.

3. Inspect and Replace Ignition Coil (if necessary)

• If the ignition coil was found faulty during diagnostics:
  • Remove the faulty ignition coil.
  • Install the new ignition coil following the same steps as above.
• Ensure the electrical connector is properly seated.

4. Check and Clean Fuel Injector (if necessary)

• If the fuel injector was found faulty:
  • Remove the fuel rail assembly (if necessary) to access the injector.
  • Disconnect the fuel line and electrical connector from the injector.
  • Remove the injector from the rail.
  • Clean the injector using a suitable cleaning solution or replace it with a new one.
• Reinstall the fuel injector and ensure all connections are secure.

5. Finalize and Reconnect

• Reinstall any components removed during the repair (e.g., engine cover, fuel rail).
• Reconnect the negative battery terminal.