how to fix P0301 misfire code in Genesis G70 IG (2017-2023)

Learn how to diagnose and fix P0301 cylinder 1 misfire in Genesis G70 (2017-2023). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the battery to ensure safety while working on the ignition and fuel systems.
• Allow the engine to cool if it has been running.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease.
• Remove the ignition coil from cylinder 1 by unscrewing the retaining bolts and gently lifting it out.
• Remove the spark plug using a spark plug socket.
• Inspect the old spark plug for signs of wear. If it appears damaged, install a new spark plug with the correct specifications (typically NGK or Denso brand).
• Apply a small amount of dielectric grease to the spark plug threads.
• Torque the new spark plug to the manufacturer-recommended specification (usually around 13-15 lb-ft).

3. Replace Ignition Coil (if necessary)

• Tools Required: Socket set.
• If the ignition coil is faulty, replace it by removing the retaining bolts and disconnecting the electrical connector.
• Install the new ignition coil and secure it with the bolts.
• Reconnect the electrical connector.

4. Inspect and Clean Fuel Injector (if necessary)

• Tools Required: Fuel injector cleaning kit or replacement injector.
• Disconnect the fuel line and electrical connector from the fuel injector on cylinder 1.
• Remove the fuel injector from the rail.
• Clean the injector using a fuel injector cleaning kit or replace it if necessary.
• Reinstall the fuel injector and reconnect the fuel line and electrical connector.

5. Reassemble and Reconnect Battery

• Reinstall any components removed during the process.
• Reconnect the battery terminals.