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 all tools and parts needed for the repair.
• Disconnect the negative battery terminal to ensure safety while working on electrical components.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Visually inspect the air intake duct for cracks or loose connections.
  2. Tighten or replace any loose or damaged hoses.
  3. Check the intake manifold gasket for leaks and replace if necessary.
• Tools Required: Screwdriver set, hose clamps, flashlight.

3. Clean or Replace MAF Sensor

• Sub-steps:
  1. Remove the MAF sensor from the air intake duct (note orientation for reinstallation).
  2. Use MAF sensor cleaner to clean the sensor elements gently.
  3. Allow the sensor to dry completely before reinstalling.
• Tools Required: MAF sensor cleaner, torque wrench (for reinstallation).

4. Check Fuel System Pressure

• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail test port.
  2. Turn the ignition to the "ON" position (do not start the engine) and check the pressure.
  3. If pressure is below specifications, inspect the fuel pump and filter for potential replacement.
• Tools Required: Fuel pressure gauge, socket set.

5. Inspect for Vacuum Leaks

• Sub-steps:
  1. Perform a visual inspection of all vacuum hoses connected to the intake manifold.
  2. Use a smoke machine to detect hard-to-find vacuum leaks.
  3. Seal or replace leaking hoses as needed.
• Tools Required: Smoke machine, vacuum hose assortment.