how to troubleshoot the P0301 code in my 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.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Replace Ignition Components

• Tools Required: Socket set, torque wrench, spark plug socket, ignition coil puller.
• Remove the engine cover if necessary.
• Disconnect the ignition coil connector for cylinder 1.
• Remove the ignition coil by unscrewing the bolts, then pulling it straight out.
• Inspect the spark plug for wear; if worn or fouled, remove it using a spark plug socket.
• Replace the spark plug and ignition coil with new components, ensuring proper torque (typically 13 lb-ft for spark plugs).
• Reconnect the ignition coil connector.

3. Check Fuel Injector

• Tools Required: Fuel injector tester or multimeter.
• Disconnect the electrical connector from the fuel injector for cylinder 1.
• Use the fuel injector tester to check for proper operation or resistance readings (should typically be around 12-16 ohms).
• If faulty, replace the fuel injector and ensure proper sealing.

4. Compression Test

• Tools Required: Compression tester.
• Remove the spark plug for cylinder 1.
• Screw the compression tester into the spark plug hole.
• Crank the engine for a few seconds and record the compression reading.
• Compare the reading to manufacturer specifications; a significantly low reading indicates an internal engine issue.

5. Reassemble and Reconnect

• Reinstall any components removed during the inspection and repair.
• Reconnect the battery and ensure all connections are secure.