how to resolve P0171 code on Volkswagen Golf MK7.5 (2020-Present)

Solution

1. Preparation

• Gather tools and safety equipment.
• Tools required: OBD-II scanner, multimeter, fuel pressure gauge, socket set, screwdrivers, cleaning supplies.
• Safety warnings: Disconnect the battery before starting work on electrical components.

2. Inspect and Repair Air Intake System

• Remove the engine cover (if applicable) using the socket set.
• Inspect the intake manifold and throttle body for cracks or leaks.
• Tighten any loose clamps or connections.
• Replace any damaged hoses or components as necessary.

3. Clean or Replace MAF Sensor

• Locate the MAF sensor on the air intake duct.
• Disconnect the electrical connector and remove the sensor from the housing.
• Clean the MAF sensor with MAF cleaner spray, avoiding contact with the sensor elements.
• If the sensor is damaged, replace it with a new one.

4. Check and Repair Fuel System

• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition key to the "On" position (do not start the engine) and check the pressure reading.
• If the pressure is below specifications, check the fuel pump and filter for issues and replace as necessary.
• If fuel injectors are suspected to be clogged, use a fuel injector cleaning kit or replace them.

5. Verify Vacuum Hoses and Connections

• Inspect all vacuum hoses for wear or damage.
• Replace any compromised hoses.
• Ensure all connections to the intake manifold are secure.