how to fix the P0171 code in my Genesis G70 IG (2017-2023)?

Solution

1. Preparation

• Tools Required: OBD-II scanner, fuel pressure gauge, multimeter, socket set, cleaning tools.
• Disconnect the negative battery terminal to prevent electrical short circuits.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  1. Visually inspect all vacuum hoses connected to the intake manifold for cracks or disconnections.
  2. Use a smoke machine or carburetor cleaner to identify any leaks around gaskets and hoses.
  3. Replace any damaged hoses or gaskets identified during the inspection.

3. Check and Replace MAF Sensor

• Sub-steps:
  1. Locate the MAF sensor in the air intake duct.
  2. Disconnect the electrical connector and remove the sensor from its housing.
  3. Clean the MAF sensor using MAF cleaner; do not touch the sensor element.
  4. Reinstall the MAF sensor and reconnect the electrical connector.

4. Test and Adjust Fuel Pressure

• Sub-steps:
  1. Connect the fuel pressure gauge to the fuel rail service port.
  2. Turn the ignition to the "ON" position (do not start the engine) and check the pressure reading.
  3. If pressure is below specification, check the fuel pump and filter for issues; replace as necessary.

5. Inspect and Clean Throttle Body

• Sub-steps:
  1. Remove the air intake duct connected to the throttle body.
  2. Use throttle body cleaner to clean the throttle plate and bore.
  3. Reassemble the intake duct ensuring a proper seal.