how to fix P0171 code on Genesis G70 IG (2017-2023)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool down before starting work.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, screwdriver set, vacuum gauge
• Sub-steps:
  1. Remove the engine cover (if applicable) to gain access to the intake system.
  2. Inspect all intake hoses and connections for visible cracks or damage; replace any damaged components.
  3. Tighten any loose clamps to ensure a secure fit.
  4. If leaks are detected, replace the affected hoses or gaskets as necessary.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, Torx screwdriver
• Sub-steps:
  1. Unplug the MAF sensor connector carefully.
  2. Remove the MAF sensor from the intake duct using the Torx screwdriver.
  3. Clean the sensor element with MAF cleaner, avoiding direct contact with the sensor.
  4. Allow the sensor to dry completely before reinstalling it.
  5. Reattach the MAF sensor and plug in the connector.

4. Inspect Fuel System

• Tools Required: Fuel pressure gauge, socket set
• Sub-steps:
  1. Connect the fuel pressure gauge to the fuel rail test port.
  2. Turn the ignition to the ON position (do not start the engine) and check fuel pressure. It should match manufacturer specifications.
  3. If pressure is low, inspect the fuel filter and replace it if clogged.
  4. Check the fuel injectors for proper operation and replace any that are faulty.

5. Check and Replace Oxygen Sensors (if necessary)

• Tools Required: O2 sensor socket, torque wrench
• Sub-steps:
  1. Locate the upstream oxygen sensor and disconnect its electrical connector.
  2. Remove the sensor using an O2 sensor socket.
  3. Install the new sensor, ensuring it is torqued to the manufacturer's specifications.
  4. Reconnect the electrical connector.