why does my Genesis G70 IG (2017-2023) check engine light come on when idling

Discover why the check engine light illuminates when idling in Genesis G70 IG (2017-2023). Follow our diagnostic steps and solutions for effective repair.

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the negative battery terminal to ensure safety.

2. Address Error Codes

• Refer to OBD-II codes retrieved during diagnostic steps.
• For example, if a misfire code is present (P0300-P0306), proceed to inspect ignition components.

3. Replace Spark Plugs (if applicable)

• Remove ignition coil covers using a socket set.
• Disconnect the electrical connectors from the ignition coils.
• Remove the ignition coils and spark plugs.
• Replace with new spark plugs (check gap specifications).
• Reinstall ignition coils and covers, ensuring correct torque.

4. Inspect and Clean Throttle Body

• Remove the air intake duct to access the throttle body.
• Clean the throttle body using throttle body cleaner and a soft cloth.
• Reinstall the air intake duct securely.

5. Check and Repair Vacuum Leaks

• Use a smoke machine to introduce smoke into the intake system.
• Observe for smoke escaping from any hoses or gaskets.
• Replace any damaged hoses or gaskets found during inspection.

6. Test Fuel Pressure

• Connect a fuel pressure gauge to the fuel rail.
• Start the engine and observe the pressure reading.
• Compare the reading to manufacturer specifications; replace the fuel pump if low.