how to fix P0174 code on my 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 required.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool down before starting work.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  1. Visually inspect all vacuum hoses for cracks or disconnections.
  2. Use a smoke machine or carburetor cleaner to detect leaks.
  3. Replace any damaged hoses or gaskets found during inspection.
• Tools Required: Smoke machine, carburetor cleaner, basic hand tools.

3. Clean or Replace MAF Sensor

• Sub-steps:
  1. Disconnect the MAF sensor electrical connector.
  2. Remove the MAF sensor from the intake duct.
  3. Clean the sensor with MAF cleaner or replace it if damaged.
  4. Reinstall the MAF sensor and reconnect the electrical connector.
• Tools Required: MAF cleaner, screwdriver.

4. Check and Replace Oxygen Sensors

• Sub-steps:
  1. Locate the upstream and downstream oxygen sensors on bank 2.
  2. Disconnect the sensors and use a socket to remove them.
  3. Install new oxygen sensors and reconnect the wiring harness.
• Tools Required: Oxygen sensor socket, wrench.

5. Check Fuel Pressure

• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail.
  2. Turn the ignition to the "ON" position without starting the engine to check pressure.
  3. Compare readings to manufacturer specifications; replace fuel pump if pressure is low.
• Tools Required: Fuel pressure gauge.