how to fix P0171 code in Volkswagen Golf MK7.5 (2020-Present)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to prevent electrical shorts.
• Ensure the vehicle is parked on a level surface and engage the parking brake.

2. Inspect and Clean MAF Sensor

• Tools Required: MAF sensor cleaner, screwdriver.
• Remove the MAF sensor from the air intake duct.
• Spray the MAF sensor with MAF cleaner and allow it to dry completely before reinstalling.
• Reinstall the MAF sensor securely.

3. Check and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps.
• Inspect all vacuum hoses connected to the intake manifold for cracks or damage.
• Replace any damaged hoses and secure all connections with hose clamps.

4. Check Fuel Pressure

• Tools Required: Fuel pressure gauge.
• Connect the fuel pressure gauge to the fuel rail's service port.
• Turn the ignition to the "ON" position (do not start the engine) and check the pressure reading.
• If the pressure is outside the manufacturer's specifications, consider replacing the fuel pump or filter.

5. Replace or Repair Air Intake Components

• Inspect the air filter and replace it if clogged or dirty.
• Check the air intake duct for any obstructions or damage and replace it if necessary.