how to fix P0174 code on 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.
• Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps, screwdriver set.
• Sub-steps:
  1. Use a vacuum gauge to check for leaks in the intake system.
  2. Visually inspect all vacuum hoses and connections; replace any cracked or damaged hoses.
  3. Tighten any loose clamps or connections.

3. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner, Torx screwdriver (if applicable).
• Sub-steps:
  1. Locate the MAF sensor in the intake path.
  2. Disconnect the electrical connector.
  3. Remove the MAF sensor using the appropriate screwdriver.
  4. Clean the MAF sensor with MAF cleaner and let it dry completely; if damaged, replace it with a new sensor.

4. Check Fuel Pressure

• Tools Required: Fuel pressure gauge.
• Sub-steps:
  1. Locate the fuel rail access point.
  2. Connect the fuel pressure gauge and turn the ignition to the ON position without starting the engine.
  3. Check that the fuel pressure meets manufacturer specifications (typically between 50-60 psi).
  4. If pressure is low, inspect the fuel pump and filter for issues.

5. Inspect Fuel Injectors

• Tools Required: Injector cleaning kit, multimeter (for electrical testing).
• Sub-steps:
  1. Remove the fuel injectors from the rail.
  2. Test each injector's resistance with a multimeter; replace any injectors that are out of specification.
  3. Clean the injectors using an injector cleaning kit as per instructions.
  4. Reinstall the injectors ensuring all seals are intact.