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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Replace Spark Plug

• Remove the ignition coil from cylinder 2:
  • Unscrew the bolts securing the ignition coil.
  • Gently pull the ignition coil out of the spark plug well.
• Remove the spark plug:
  • Use a spark plug socket and ratchet to unscrew the spark plug.
  • Inspect the old spark plug for wear or damage.
• Install a new spark plug:
  • Apply anti-seize lubricant to the threads of the new spark plug.
  • Torque the spark plug to the manufacturer’s specification (typically around 13-15 lb-ft).
• Reinstall the ignition coil:
  • Align the coil over the spark plug and push it down until it seats properly.
  • Reattach the securing bolts and connector.

3. Test and Replace Fuel Injector (If Necessary)

• Disconnect the fuel injector connector from cylinder 2.
• Remove the fuel rail if necessary to access the injector:
  • Release fuel system pressure by removing the fuel pump fuse and cranking the engine.
  • Unscrew the bolts securing the fuel rail and lift it off gently.
• Remove the faulty fuel injector:
  • Pull the injector straight out of the rail.
  • Compare the old injector to the new one for compatibility.
• Install the new fuel injector:
  • Lubricate the O-rings with clean engine oil before installation.
  • Push the new injector into the fuel rail until it clicks into place.
• Reassemble the fuel rail and reconnect electrical connectors.

4. Clear Codes and Test Drive

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0302 code from the vehicle's computer.
• Start the engine and conduct a test drive to ensure the issue is resolved.