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 ensure safety.
• Allow the engine to cool down completely before starting work.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, pliers, vacuum gauge
• Visually inspect all intake hoses for cracks or loose connections.
• Use a vacuum gauge to check for leaks in the intake manifold.
• Replace any damaged hoses and repair any leaks found.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, screwdriver
• Locate the MAF sensor in the intake duct.
• Remove the sensor by unscrewing it from the housing.
• Clean the sensor with MAF cleaner and let it dry completely before reinstalling.
• If it’s faulty, replace it with a new sensor.

4. Check Fuel Pressure

• Tools Required: Fuel pressure gauge
• Connect the fuel pressure gauge to the fuel rail service port.
• Turn the ignition on (do not start the engine) and check the fuel pressure reading.
• If the pressure is below specifications, inspect the fuel pump and filter for issues.

5. Inspect Fuel Injectors

• Tools Required: O-ring lubricant, flat-head screwdriver
• Remove the fuel rail and inspect the injectors for clogs or leaks.
• Clean the injectors using appropriate cleaning solutions or replace if necessary.
• Ensure O-rings are lubricated and in good condition before reinstallation.

6. Verify Engine Coolant Temperature Sensor

• Tools Required: Multimeter
• Locate the coolant temperature sensor and disconnect the connector.
• Use a multimeter to check the resistance of the sensor at various temperatures.
• Replace the sensor if readings are out of specification.