how to fix the P0302 misfire code on my Genesis G70 IG (2017-2023)

Solution

1. Preparation

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

2. Replace Spark Plug and Ignition Coil

• Spark Plug Replacement:

  • Remove the engine cover if applicable.
  • Remove the spark plug wire or ignition coil connector from cylinder 2.
  • Use a spark plug socket and ratchet to remove the spark plug from cylinder 2.
  • Inspect the old spark plug for wear and gap.
  • Install a new spark plug (ensure proper gap per manufacturer specifications).
  • Torque the spark plug to the manufacturer's specifications (typically around 13-16 lb-ft).

• Ignition Coil Replacement:

  • If the ignition coil is faulty, remove the ignition coil from cylinder 2 by unbolting it and pulling it straight out.
  • Install the new ignition coil and secure it with bolts to the manufacturer's torque specifications (typically around 5-7 lb-ft).
  • Reconnect the ignition coil connector.

3. Test and Replace Fuel Injector (if necessary)

• Remove the fuel injector connector from cylinder 2.
• Use a noid light to verify the injector is receiving the correct signal.
• If the injector is not functioning correctly, remove it by unbolting the fuel rail and lifting it off.
• Replace the faulty fuel injector with a new one, ensuring to lubricate the O-rings for proper sealing.
• Reassemble the fuel rail and reconnect the fuel injector connector.