how to diagnose P0302 misfire code in Genesis G70 IG (2017-2023)

Solution

1. Preparation

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

2. Inspect and Replace Ignition Components

• Inspect Spark Plug:
  • Remove the spark plug from cylinder 2 using a socket set.
  • Check the spark plug for wear, carbon buildup, or damage.
  • Replace with the manufacturer's recommended spark plug if necessary.
• Inspect Ignition Coil:
  • Remove the ignition coil from cylinder 2.
  • Check for cracks or signs of arcing.
  • Replace the ignition coil if any defects are found.

3. Check and Replace Fuel Injector

• Remove Fuel Injector:
  • Disconnect the electrical connector and fuel line to the injector.
  • Remove the injector from the intake manifold.
• Inspect and Test:
  • Check the injector for clogs or carbon deposits.
  • Test the injector resistance with a multimeter for proper electrical function.
• Replace if Necessary:
  • Install a new fuel injector if the old one is defective or clogged.

4. Compression Test

• Perform Compression Test:
  • Reinstall the spark plug and ignition coil.
  • Use a compression gauge to test cylinder 2.
  • Compare the readings against the manufacturer’s specifications.
• Address Any Low Compression:
  • If compression is low, further investigation may be required for head gasket, valves, or piston issues.