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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, flashlight
• Inspect the air intake hose and connections for cracks or loose clamps.
  • If any damage is found, replace the hose or tighten the clamps as needed.

3. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner (non-residue), screwdriver
• Remove the MAF sensor from the air intake duct.
  • Clean the sensor using MAF cleaner; do not touch the sensor element.
  • If cleaning does not resolve the issue, replace the MAF sensor with a new one.

4. Check and Adjust Fuel Pressure

• Tools Required: Fuel pressure gauge
• Connect the fuel pressure gauge to the fuel rail.
  • Start the engine and check that the fuel pressure is within specifications (typically around 50-60 psi for G70).
  • If pressure is low, inspect the fuel filter and fuel pump for issues.

5. Inspect Fuel Injectors

• Tools Required: Multimeter or injector tester
• Test the fuel injectors for proper operation.
  • If any injector is not functioning correctly, replace the faulty injector.

6. Verify ECT Sensor Operation

• Tools Required: Multimeter
• Check the resistance of the ECT sensor according to the manufacturer's specifications.
  • Replace the ECT sensor if it is out of range.