how to fix P0171 code in Skoda Octavia NFL (2020-Present)

Learn how to diagnose and fix P0171 engine lean condition in Skoda Octavia NFL. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety.
• Allow the engine to cool completely before starting work.

2. Inspect and Repair Air Intake System

• Tools Required: Screwdriver set, vacuum gauge, hose clamps.
• Inspect all vacuum hoses connected to the intake manifold for cracks or disconnections.
• Replace any damaged hoses.
• Tighten any loose clamps around the air intake duct.

3. Test and Clean MAF Sensor

• Tools Required: MAF cleaner, soft cloth.
• Remove the MAF sensor from the air intake duct.
• Clean the MAF sensor using MAF cleaner; do not touch the sensor element.
• Reinstall the MAF sensor securely.

4. Check and Adjust Fuel Pressure

• Tools Required: Fuel pressure gauge, socket set.
• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition to the "ON" position without starting the engine and check the pressure.
• If pressure is below manufacturer specifications, replace the fuel pump or regulator as necessary.

5. Inspect Fuel Injectors

• Tools Required: Injector cleaning kit (if cleaning is needed), multimeter.
• Use the multimeter to check the resistance of each injector; replace any that fall outside of specification.
• If necessary, clean the injectors using an injector cleaning kit.

6. Inspect and Replace Oxygen Sensors (if needed)

• Tools Required: O2 sensor socket, torque wrench.
• Check the oxygen sensors for proper operation using a multimeter or scan tool.
• If faulty, remove the old sensor using an O2 sensor socket and install a new one, torquing to manufacturer specifications.