how to fix P0306 code in Genesis G70 IG (2017-2023)

Learn how to diagnose and fix P0306 cylinder 6 misfire in Genesis G70. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools including an OBD-II scanner, socket set, torque wrench, multimeter, and compression tester.
• Disconnect the battery to ensure safety during repairs.

2. Replace Ignition Coil and Spark Plug

1. Locate the ignition coil and spark plug for cylinder 6.
2. Remove the engine cover if necessary to access the ignition components.
3. Disconnect the electrical connector from the ignition coil.
4. Remove the ignition coil by unscrewing the mounting bolts (typically 8mm).
5. Remove the spark plug using a spark plug socket (typically 16mm or 18mm).
6. Inspect the condition of the removed spark plug; replace if fouled or worn.
7. Install the new spark plug and torque to the manufacturer's specification (usually around 13 lb-ft).
8. Install the new ignition coil and secure it with bolts, then reconnect the electrical connector.

3. Test Fuel Injector

1. Disconnect the fuel injector connector for cylinder 6.
2. Use a multimeter to check the resistance of the fuel injector; compare with manufacturer specifications.
3. If the injector is faulty, remove it using appropriate tools.
4. Install a new fuel injector, ensuring it is seated properly, and reconnect the electrical connector.

4. Compression Test

1. Remove the spark plug from cylinder 6 again.
2. Insert the compression tester into the spark plug hole.
3. Crank the engine for a few seconds and record the compression reading.
4. If the compression is below the manufacturer's specifications, inspect for potential internal engine issues.