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

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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to prevent any electrical shorts during the repair.
• Allow the engine to cool down before working on the intake system.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  • Visually inspect all vacuum hoses and connections for cracks or disconnections.
  • Use a smoke machine or propane torch (with caution) to identify any vacuum leaks.
  • Replace any damaged hoses and ensure all connections are tight.

3. Check and Clean MAF Sensor

• Sub-steps:
  • Locate the MAF sensor in the intake air duct.
  • Disconnect the electrical connector and unscrew the sensor from the duct.
  • Use MAF sensor cleaner to spray and clean the sensor element. Avoid touching it with fingers.
  • Reinstall the MAF sensor and reconnect the electrical connector.

4. Test Fuel Pressure

• Sub-steps:
  • Locate the fuel rail and attach the fuel pressure gauge.
  • Start the engine and check the fuel pressure against the manufacturer specifications.
  • If the pressure is low, check the fuel pump and filter, replacing them if necessary.

5. Inspect and Test Oxygen Sensor

• Sub-steps:
  • Locate the bank 2 oxygen sensor (usually located after the catalytic converter).
  • Disconnect the sensor and use a multimeter to check its voltage output while the engine is running.
  • If the sensor is not functioning correctly, replace it.