how to fix P0301 misfire code on 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 tools and parts required for the repair.
• Disconnect the negative terminal of the battery to ensure safety.

2. Inspect Ignition Components

• Tools Required: Socket set, torque wrench, spark plug socket, multimeter
• Remove the engine cover if applicable.
• Remove the ignition coil for cylinder 1 by unbolting it and disconnecting the electrical connector.
• Inspect the ignition coil for cracks or carbon tracking.
• Remove and inspect the spark plug for wear and carbon buildup; replace if necessary.

3. Test and Replace Components

• Tools Required: Multimeter, compression tester
• Test the ignition coil using a multimeter to check for proper resistance.
• If faulty, replace the ignition coil with a new one (ensure it meets OEM specifications).
• If the spark plug is worn, replace it with the correct type as specified in the owner's manual.

4. Check Fuel Injector

• Tools Required: Fuel injector cleaner, wrench set
• Remove the fuel injector from cylinder 1.
• Clean the injector using a fuel injector cleaning kit or replace if it is clogged or malfunctioning.
• Reinstall the injector ensuring it is seated properly.

5. Reassemble and Test

• Reinstall the ignition coil and ensure all connections are secure.
• Reconnect the battery terminal.
• Start the engine and check for smooth operation and any check engine light reactivation.