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

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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety during repairs.

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 or gaskets as needed.
  3. Check the throttle body and clean it if there is any buildup of carbon deposits.

• Tools Required:

  • Screwdrivers
  • Pliers

3. Check and Clean MAF Sensor

• Sub-steps:

  1. Locate the MAF sensor within the air intake duct.
  2. Disconnect the electrical connector and remove the sensor from its housing.
  3. Use MAF cleaner to spray the sensor element gently and allow it to dry completely before reinstalling.

• Tools Required:

  • MAF cleaner
  • Torx screwdriver (if applicable)

4. Test Fuel Pressure

• Sub-steps:

  1. Connect the fuel pressure gauge to the fuel rail.
  2. Turn the ignition to the "ON" position without starting to check the pressure reading.
  3. Compare the reading to manufacturer specifications (typically between 50-65 psi for the Genesis G70).
  4. If the pressure is low, inspect the fuel pump and filter for issues.

• Tools Required:

  • Fuel pressure gauge

5. Inspect and Test Fuel Injectors

• Sub-steps:

  1. Remove the fuel injectors from their rail.
  2. Check for clogs using a multimeter to test resistance (should be within manufacturer specs).
  3. Clean or replace any faulty injectors.

• Tools Required:

  • Multimeter
  • Injector cleaner kit