why does my Genesis G70 IG (2017-2023) check engine light stay on

Solution

1. Preparation

• Gather tools and parts needed for repair.
• Park the vehicle on a level surface and engage the parking brake.
• Disconnect the battery to avoid electrical shorts.

2. Address Error Codes

• Sub-steps:
  1. Connect the OBD-II scanner to the vehicle's diagnostic port.
  2. Retrieve and note down the trouble codes.
  3. Research the codes to determine the specific issues (e.g., P0420 for catalytic converter efficiency).

3. Repair Identified Issues

• Sub-steps:
  • If a vacuum leak is detected:
    1. Locate and replace any damaged vacuum hoses.
    2. Use a smoke machine to detect hard-to-find leaks if necessary.
  • If spark plugs or ignition coils are faulty:
    1. Remove the ignition coil by unscrewing the mounting bolts.
    2. Replace spark plugs with OEM parts, ensuring proper gap settings (usually 0.028 inches for G70).
    3. Reinstall ignition coils and secure them.
  • If fuel injectors are faulty:
    1. Remove the fuel rail assembly.
    2. Replace the faulty injectors with new ones.
    3. Reattach the fuel rail and ensure all connections are tight.

4. Reset Check Engine Light

• Sub-steps:
  1. Reconnect the battery terminals.
  2. Clear the error codes using the OBD-II scanner.
  3. Start the engine and allow it to idle.