how to fix 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

• Gather tools and parts needed.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool down completely.

2. Replace Spark Plug

• Tools Required: Socket set, spark plug socket, torque wrench.
• Remove the engine cover (if applicable) to access the spark plugs.
• Disconnect the ignition coil connector for cylinder 1.
• Unscrew the ignition coil and remove it.
• Remove the old spark plug using a spark plug socket.
• Check the gap on the new spark plug and adjust if necessary.
• Install the new spark plug hand-tight, then torque to the manufacturer's specification (typically around 13-15 lb-ft).
• Reinstall the ignition coil and reconnect the connector.

3. Replace Ignition Coil (if necessary)

• Follow the steps from the previous section to remove the ignition coil.
• Install a new ignition coil for cylinder 1, ensuring it clicks into place.
• Reconnect the ignition coil connector.

4. Inspect and Clean Fuel Injector (if necessary)

• Disconnect the fuel injector connector for cylinder 1.
• Remove the fuel rail (ensure to relieve fuel pressure first).
• Remove the injector, inspecting for clogs or damage.
• Clean the injector with a suitable cleaning solvent or replace if necessary.
• Reinstall the injector and fuel rail, ensuring all seals are properly seated.

5. Verify Engine Compression (if necessary)

• If all previous steps do not resolve the issue, perform a compression test.
• Remove the spark plug from cylinder 1 and connect the compression tester.
• Crank the engine and record the compression reading.
• Compare to the manufacturer's specifications (usually around 140-180 psi).
• If low, further engine diagnostics may be required.