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 necessary tools and parts.
• Park the vehicle on a level surface and turn off the ignition.
• Disconnect the battery to ensure safety.

2. Inspect and Replace Spark Plug

• Remove the engine cover if applicable.
• Use a spark plug socket and ratchet to remove the spark plug from cylinder 1.
• Inspect the spark plug for wear and replace with a new spark plug (ensure correct gap as per manufacturer specifications).
• Reinstall the spark plug and torque it to the manufacturer's specifications (typically around 13-15 lb-ft).

3. Check and Replace Ignition Coil

• Disconnect the electrical connector from the ignition coil for cylinder 1.
• Remove the ignition coil by unscrewing any securing bolts.
• Inspect the coil for damage. If faulty, replace it with a new ignition coil.
• Reinstall the ignition coil and reconnect the electrical connector.

4. Inspect and Clean Fuel Injector

• Disconnect the fuel injector connector for cylinder 1.
• Remove the fuel rail, if necessary, to access the injector.
• Inspect the injector for clogs and clean it with appropriate fuel injector cleaner or replace it if necessary.
• Reinstall the fuel injector and ensure proper seating in the rail.

5. Perform Compression Test

• Remove the spark plug from cylinder 1 and install the compression tester.
• Crank the engine and record the compression reading. It should meet the manufacturer’s specifications.
• If compression is low, further diagnosis may be required for internal engine issues.