how to fix P0302 misfire code in Toyota RAV4 XA40 (2013-2018)

Solution

1. Preparation

• Gather tools and parts.
• Tools Required:
  • OBD-II scanner
  • Socket set
  • Torque wrench
  • Multimeter
  • Compression tester
  • Screwdrivers
• Parts Required:
  • Replacement spark plug (if necessary)
  • Replacement ignition coil (if necessary)
  • Replacement fuel injector (if necessary)
• Safety Warnings:
  • Disconnect the battery before starting work to prevent electrical shorts.

2. Replace Spark Plug

• Remove the engine cover (if applicable) using the socket set.
• Disconnect the ignition coil connector from cylinder 2.
• Remove the ignition coil by unscrewing the bolts and lifting it out.
• Unscrew the spark plug from cylinder 2 using a spark plug socket.
• Inspect the old spark plug for signs of wear; if it is worn or fouled, replace it with a new spark plug.
• Install the new spark plug, ensuring it is torqued to the manufacturer’s specifications (typically around 13 lb-ft).
• Reinstall the ignition coil and reconnect the connector.

3. Replace Ignition Coil (if necessary)

• If the ignition coil was determined to be faulty during diagnosis, remove it as described above.
• Install the new ignition coil in place of the old one and secure it with bolts.
• Reconnect the ignition coil connector.

4. Replace Fuel Injector (if necessary)

• Remove the fuel rail assembly, ensuring the fuel pressure is relieved prior to removal.
• Disconnect the electrical connector from the fuel injector on cylinder 2.
• Remove the fuel injector securing clips and pull the injector out from its seat.
• Install the new fuel injector and secure it with clips.
• Reassemble the fuel rail and reconnect the fuel line, ensuring there are no leaks.

5. Final Steps

• Reconnect the battery.
• Clear the DTC using the OBD-II scanner.
• Start the engine and check for any misfires or check engine light illumination.