how to deal with a check engine light and P0301 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

• Tools Required: OBD-II scanner, torque wrench, socket set, compression tester, multimeter, fuel injector cleaning kit.
• Disconnect the negative battery terminal to ensure safety while working on the electrical components.

2. Inspect and Replace Spark Plug

• Remove the ignition coil from cylinder 1 using a socket set.
• Take out the spark plug using a spark plug socket. Inspect for wear, damage, or fouling.
• If the spark plug is worn or damaged, replace it with a new one that meets OEM specifications. Torque to manufacturer's specifications (typically around 15-20 ft-lbs).

3. Check and Replace Ignition Coil

• If the spark plug is in good condition, test the ignition coil with a multimeter. Check for proper resistance values as specified in the service manual.
• If faulty, replace the ignition coil with a new one. Ensure proper installation and torque to manufacturer specifications.

4. Inspect Fuel Injector

• Disconnect the fuel injector connector and perform a resistance test using a multimeter. Compare the reading to the OEM specifications.
• If the injector is faulty, remove it using the appropriate tools and replace it with a new one. Clean the fuel rail and ensure proper sealing upon installation.

5. Compression Test

• Perform a compression test on cylinder 1 to verify that the cylinder is sealing properly. Record the reading and compare it to the specifications found in the service manual.
• If compression is low, further investigation may be needed for internal engine repairs.