how to resolve the P0301 misfire code in my Genesis G70 IG (2017-2023)

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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety.
• Allow the engine to cool down before beginning work.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug gap gauge.
• Remove the engine cover if applicable.
• Using the socket set, remove the spark plug from cylinder 1.
• Inspect the old spark plug for signs of wear (e.g., carbon buildup, wear pattern).
• Install the new spark plug, ensuring the gap is set to manufacturer specifications (typically around 0.028-0.032 inches).
• Torque the spark plug to the manufacturer’s specifications (usually around 13-16 lb-ft).

3. Replace Ignition Coil

• Tools Required: Socket set, pliers.
• Unplug the ignition coil connector.
• Remove the mounting bolts for the ignition coil using the socket set.
• Take out the old ignition coil and install the new one.
• Reconnect the ignition coil connector and ensure it clicks into place.

4. Inspect and Replace Fuel Injector (if necessary)

• Tools Required: Fuel injector puller (if available), socket set.
• Relieve fuel pressure by removing the fuel pump fuse and running the engine until it stalls.
• Disconnect the fuel injector connector.
• Remove any retaining clips or bolts and pull the fuel injector out.
• Install the new fuel injector, ensuring it seats properly and reconnect the connector.

5. Reassemble and Reconnect Battery

• Reinstall any components removed during the process (e.g., engine cover).
• Reconnect the battery terminals and ensure they are secure.