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 negative battery terminal to ensure safety.
• Allow the engine to cool before starting work.

2. Inspect and Replace Ignition Components

Tools Required:

• Socket set
• Torque wrench
• Spark plug socket

Steps:

1. Remove the engine cover if applicable.
2. Disconnect the ignition coil connector for cylinder 1.
3. Remove the ignition coil using a socket set.
4. Inspect the spark plug; replace if worn or damaged.
5. Install the new spark plug and torque it to manufacturer specifications (typically around 13-16 lb-ft).
6. Reinstall the ignition coil and reconnect the connector.

3. Inspect and Clean Fuel Injector

Tools Required:

• Fuel injector cleaning kit (if needed)
• Torque wrench

Steps:

1. Disconnect the fuel injector connector for cylinder 1.
2. Remove the fuel rail bolts and gently pull the fuel rail away from the intake manifold.
3. Extract the fuel injector from the fuel rail.
4. Clean the injector using a fuel injector cleaning kit or replace it if it is faulty.
5. Reinstall the injector into the fuel rail and secure it.

4. Perform Compression Test

Tools Required:

• Compression tester

Steps:

1. Remove the spark plug from cylinder 1 again.
2. Insert the compression tester into the spark plug hole.
3. Crank the engine for a few seconds and note the compression reading.
4. Compare the reading to manufacturer specifications (typically around 150-200 psi).
5. If low, inspect the valves and piston rings for damage.