how to fix P0174 code in Genesis G70 IG (2017-2023)

Learn how to diagnose and fix P0174 engine lean condition in Genesis G70 (2017-2023). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts required.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool before starting.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Visually inspect all vacuum hoses connected to the intake manifold for cracks or disconnections.
  2. Replace any damaged hoses with OEM parts.
  3. Check the intake manifold gasket for leaks; replace if necessary.

Tools Required: Vacuum gauge, hose clamps, socket set.

3. Clean or Replace MAF Sensor

• Sub-steps:
  1. Remove the MAF sensor from the air intake duct.
  2. Clean the MAF sensor using MAF cleaner spray to remove dirt and debris.
  3. Inspect the wiring harness for any damage; repair if needed.
  4. Reinstall the MAF sensor.

Tools Required: MAF sensor cleaner, screwdriver, safety goggles.

4. Test and Repair Fuel System

• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail and turn the ignition to the "ON" position without starting the engine.
  2. Check that the fuel pressure is within manufacturer specifications (typically between 50-60 PSI).
  3. If pressure is low, inspect fuel pump, fuel filter, and fuel injectors.
  4. Replace faulty components as necessary.

Tools Required: Fuel pressure gauge, socket set, replacement fuel filter or pump if needed.

5. Clear Codes and Test Drive

• Sub-steps:
  1. Reconnect the battery.
  2. Use the OBD-II scanner to clear the P0174 code.
  3. Start the engine and take the vehicle for a test drive to ensure the issue is resolved.

Tools Required: OBD-II scanner.