how to troubleshoot the P0301 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 negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil cover if applicable.
• Disconnect the ignition coil connector and remove the ignition coil.
• Remove the spark plug using a spark plug socket.
• Inspect the spark plug for wear or damage; replace if necessary.
• Install the new spark plug, torque to the manufacturer's specification (generally around 13-15 lb-ft).
• Reinstall the ignition coil and connector.

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set, torque wrench.
• If the spark plug is fine, proceed to check the ignition coil.
• Remove the ignition coil from cylinder 1.
• Test the ignition coil using a multimeter, checking the primary and secondary resistance.
• If the coil is faulty, replace it with a new one.
• Reinstall the ignition coil and secure it properly.

4. Check Fuel Injector

• Tools Required: Fuel pressure gauge, injector cleaning kit (if necessary).
• Disconnect the fuel injector connector.
• Perform a fuel pressure test to ensure proper fuel delivery.
• If the pressure is low, inspect the fuel lines and replace the fuel filter if clogged.
• If the injector is suspected to be faulty, remove and clean it or replace it with a new one.

5. Verification of Repairs

• Reconnect the negative battery terminal.
• Start the engine and allow it to reach operating temperature.
• Use the OBD-II scanner to clear the P0301 code.
• Take the vehicle for a test drive to ensure the check engine light does not re-illuminate and that the engine runs smoothly.