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

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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool down before starting work.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  • Perform a visual inspection of all vacuum hoses and connections.
  • Use a smoke machine or propane torch (without igniting) to locate leaks.
  • Replace any damaged or cracked hoses.
• Tools Required: Smoke machine or propane torch, pliers.

3. Clean or Replace MAF Sensor

• Sub-steps:
  • Locate the MAF sensor in the intake system.
  • Disconnect the electrical connector and remove the sensor.
  • Clean the sensor with MAF cleaner spray and let it dry.
  • Reinstall the sensor and reconnect the electrical connector.
• Tools Required: MAF cleaner spray, screwdriver set.

4. Check Fuel System Pressure

• Sub-steps:
  • Locate the fuel pressure test port on the fuel rail.
  • Attach a fuel pressure gauge and turn the ignition to the "on" position (do not start the engine).
  • Compare the reading to the manufacturer’s specified pressure (refer to service manual).
  • If pressure is low, inspect the fuel pump and filter for issues; replace if necessary.
• Tools Required: Fuel pressure gauge.

5. Inspect and Test Oxygen Sensors

• Sub-steps:
  • Locate the upstream and downstream oxygen sensors.
  • Disconnect the electrical connectors and remove the sensors using an oxygen sensor socket.
  • Test the sensors' resistance and functionality with a multimeter.
  • Replace any faulty sensors before reinstalling.
• Tools Required: Oxygen sensor socket, multimeter.