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

Solution

1. Preparation

• Gather all tools and parts required.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative terminal of the battery.

2. Replace Ignition Coil (if faulty)

1. Remove Engine Cover (if applicable)
   • Unscrew any fasteners and gently lift off the cover.
2. Access Ignition Coil
   • Locate the ignition coil on cylinder 2.
3. Disconnect Ignition Coil Connector
   • Press the release tab and pull off the connector.
4. Remove Ignition Coil
   • Unscrew the mounting bolt and gently pull the coil out.
5. Install New Ignition Coil
   • Position the new ignition coil and secure it with the mounting bolt.
   • Reconnect the ignition coil connector.

3. Replace Spark Plug (if faulty)

1. Remove Spark Plug
   • Use a spark plug socket to unscrew and remove the spark plug from cylinder 2.
2. Inspect Spark Plug
   • Check for wear, carbon build-up, or damage. Replace if necessary.
3. Install New Spark Plug
   • Insert the new spark plug and hand-tighten, then use a torque wrench to tighten to the manufacturer’s specifications (typically around 13-15 lb-ft).

4. Check Fuel Injector (if faulty)

1. Remove Fuel Injector Connector
   • Unplug the connector from the fuel injector on cylinder 2.
2. Test Fuel Injector Operation
   • Use a noid light to check for proper pulse signal, or a multimeter to test resistance.
3. Replace Fuel Injector
   • If faulty, remove the fuel rail and replace the injector, ensuring proper O-ring placement and reinstallation.

5. Reassemble and Test

• Reinstall the engine cover (if removed).
• Reconnect the negative battery terminal.
• Start the engine and check if the misfire code persists.