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

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

Solution

1. Preparation

• Gather tools and parts required.
• Disconnect the battery to avoid electrical shorts.
• Allow the engine to cool down before starting work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench.
• Remove the ignition coil cover if applicable.
• Use a socket to remove the spark plug from cylinder 1.
• Inspect the spark plug for signs of wear (fouling, gap wear).
• If necessary, replace the spark plug with a new OEM part. Torque to manufacturer specifications (usually around 13-15 ft-lbs).

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set.
• Remove the ignition coil from cylinder 1 by unscrewing the bolts.
• Inspect the coil for cracks or carbon tracking.
• Replace with a new ignition coil if defective.

4. Check Fuel Injector

• Tools Required: Fuel injector puller (if needed).
• Disconnect the fuel line and electrical connector from the injector.
• Remove the fuel injector from cylinder 1.
• Inspect for clogs and clean or replace if necessary.
• Reinstall the injector and reconnect the fuel line and electrical connector.

5. Compression Test

• Tools Required: Compression tester.
• Remove spark plugs from all cylinders.
• Insert the compression tester into cylinder 1.
• Crank the engine and take the reading, comparing it to manufacturer specifications.
• If the compression is low, further diagnosis for internal engine issues may be necessary.

6. Reassemble and Reconnect Battery

• Reinstall all components in reverse order of removal.
• Reconnect the battery.