how to fix a P0301 code on 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, socket set, torque wrench, multimeter, compression tester, fuel pressure gauge, dielectric grease.
• Disconnect the negative battery terminal to ensure safety while working on electrical components.

2. Check and Replace Spark Plug

• Remove the ignition coil from cylinder 1.
• Use a spark plug socket to remove the spark plug from cylinder 1.
• Inspect the spark plug for signs of wear or fouling. If damaged, replace it with a new spark plug (refer to owner’s manual for specifications).
• Apply dielectric grease to the spark plug threads to prevent seizing.
• Reinstall the spark plug and ignition coil, torquing the spark plug to the manufacturer’s specifications.

3. Inspect and Replace Ignition Coil

• If the spark plug appears fine, test the ignition coil using a multimeter to check for proper resistance (refer to specifications).
• If the ignition coil is faulty, replace it with a new one.
• Reinstall the ignition coil onto the spark plug and ensure it is seated correctly.

4. Test Fuel Injector

• Remove the fuel injector connector for cylinder 1.
• Check for voltage at the connector using a multimeter while cranking the engine.
• If there is no voltage, inspect wiring for damage or shorts. If voltage is present but the injector is not functioning, replace the fuel injector.

5. Perform Compression Test

• If misfire persists after replacing the spark plug and ignition coil, perform a compression test on cylinder 1.
• If compression is low, further investigation is needed for possible valve or piston issues.