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. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the battery to ensure safety.
• Allow the engine to cool down before starting work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug gap tool.
• Remove the ignition coil by unbolting and disconnecting the electrical connector.
• Remove the spark plug using a socket wrench.
• Inspect the spark plug for wear or damage. Replace it if necessary.
• Gap the new spark plug to the manufacturer’s specifications (typically around 0.032-0.036 inches).
• Install the new spark plug and torque it to the manufacturer’s specification (typically around 13-15 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set.
• If the spark plug is in good condition, test the ignition coil's resistance using a multimeter.
• If the coil is faulty, remove it from the engine.
• Install the new ignition coil and ensure it is securely fastened.

4. Inspect and Clean Fuel Injector

• Tools Required: Fuel injector cleaner kit, socket set.
• Remove the fuel rail to access the fuel injector for cylinder 1.
• Inspect the injector for clogs or leaks.
• Clean the injector using a fuel injector cleaning kit or replace it if cleaning does not resolve the issue.
• Reinstall the fuel rail and ensure all connections are tight.

5. Perform Compression Test

• Tools Required: Compression gauge.
• Remove the spark plug for cylinder 1.
• Insert the compression gauge and crank the engine.
• Compare the reading with the manufacturer's specifications (typically around 180-200 psi).
• If the compression is low, further diagnosis may be needed for internal engine issues.