how to fix P0302 misfire code on Toyota Camry XV50 (2012-2017)

Solution

1. Preparation

• Gather all 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 shorts.

2. Replace Spark Plug

• Remove the ignition coil from cylinder 2:
  • Unscrew the bolts securing the coil (typically 10mm).
  • Carefully pull the coil straight up to avoid damaging the connector.
• Remove the spark plug:
  • Use a spark plug socket and ratchet to unscrew the spark plug from cylinder 2.
  • Inspect the old spark plug for wear and carbon buildup.
• Install the new spark plug:
  • Apply a small amount of anti-seize compound on the threads of the new spark plug.
  • Hand-tighten the spark plug, then torque it to the manufacturer's specification (usually around 13-15 lb-ft).
• Reinstall the ignition coil and secure it with the bolts.

3. Replace Ignition Coil (if necessary)

• If the ignition coil was found faulty during inspection:
  • Disconnect the electrical connector from the coil.
  • Remove the coil from the spark plug hole.
  • Install the new ignition coil by reversing the removal steps and securing it firmly.

4. Replace Fuel Injector (if necessary)

• Disconnect the fuel rail from the injector:
  • Relieve fuel pressure by removing the fuel pump fuse and starting the engine until it stalls.
  • Disconnect the fuel line and the electrical connector from the fuel injector.
• Remove the fuel injector:
  • Unscrew any retaining clips if present and pull the injector out carefully.
• Install the new injector:
  • Lubricate the O-ring of the new injector with engine oil.
  • Push the injector into the fuel rail and secure it with clips.
• Reconnect the fuel line and electrical connectors.

5. Final Checks

• Reconnect the negative battery terminal.
• Start the engine and allow it to idle.
• Monitor for any abnormal sounds or check engine light re-illumination.