what does it mean if my Toyota Highlander Third Generation (2014-2019) has a P0302 code

Solution

1. Preparation

• Gather necessary tools and parts. Ensure the vehicle is parked on a level surface.
• Disconnect the battery negative terminal to prevent electrical shorts.
• Tools Required: OBD-II scanner, socket set, torque wrench, multimeter, compression gauge.

2. Inspect and Replace Spark Plug

• Remove the ignition coil and spark plug from cylinder 2.
  • Use a socket to unscrew the spark plug, taking care not to damage the threads.
• Inspect the spark plug for wear, carbon buildup, or damage.
  • If it appears worn, replace it with a new spark plug that meets OEM specifications.
• Reinstall the spark plug and torque it to the manufacturer’s specifications (usually around 13-16 lb-ft).

3. Test and Replace Ignition Coil (if necessary)

• Check the ignition coil for proper operation using a multimeter.
  • Measure the resistance according to the manufacturer’s specifications.
• If the ignition coil is faulty, replace it with a new one.
• Reconnect the ignition coil and ensure it is seated properly.

4. Inspect and Clean Fuel Injector

• Remove the fuel injector for cylinder 2 from the fuel rail.
  • Disconnect the electrical connector and fuel line (take precautions to avoid fuel spills).
• Clean the injector using a fuel injector cleaning kit or replace it if it is faulty.
• Reinstall the fuel injector, ensuring it is properly seated and the connections are secure.

5. Final Checks and Reassembly

• Reconnect any components that were removed (ignition coil, battery).
• Start the engine and let it idle to check for any misfires or unusual behavior.
• If everything is functioning correctly, proceed to the verification steps.