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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative terminal of the battery to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Inspect and Replace Spark Plug

1. Remove Engine Cover: If applicable, detach the engine cover by removing any bolts or fasteners.
2. Locate Spark Plug: Identify the spark plug for cylinder 2 (refer to the vehicle’s service manual for specific location).
3. Remove Spark Plug: Use a spark plug socket and ratchet to carefully unscrew the spark plug.
4. Inspect Spark Plug: Check for wear, carbon buildup, or damage. Replace if necessary with a new spark plug that meets OEM specifications.
5. Install New Spark Plug: Hand-tighten the new spark plug, then torque to the manufacturer's specifications (typically around 13-15 lb-ft).

3. Inspect and Replace Ignition Coil

1. Locate Ignition Coil: Identify the ignition coil for cylinder 2.
2. Disconnect Electrical Connector: Unplug the connector from the ignition coil.
3. Remove Ignition Coil: Unscrew the ignition coil using the appropriate socket and remove it from the cylinder head.
4. Inspect Ignition Coil: Check for damage or wear. Replace with a new coil if necessary.
5. Install New Ignition Coil: Position the new ignition coil and secure it with screws. Reconnect the electrical connector.

4. Inspect and Clean Fuel Injector

1. Access Fuel Injector: Depending on design, you may need to remove the intake manifold to access the fuel injector for cylinder 2.
2. Disconnect Fuel Line: Use a line removal tool to safely disconnect the fuel line from the injector.
3. Remove Fuel Injector: Unscrew and remove the fuel injector from its rail.
4. Clean or Replace Injector: If cleaning, use a fuel injector cleaner. If faulty, replace it with a new injector.
5. Reinstall Injector: Insert the cleaned/ new injector, reconnect the fuel line, and ensure all connections are secure.