how to fix P0171 code on 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 all necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before beginning work.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, screwdrivers
• Visually inspect all air intake hoses and connections for damage or leaks. Replace any damaged hoses.
• Tighten any loose clamps or connections to ensure a proper seal.

3. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner, soft cloth
• Remove the MAF sensor from the intake tube.
• Spray the MAF cleaner onto the sensor element and allow it to dry completely before reinstalling.
• If the sensor is damaged or cleaning does not resolve the issue, replace it 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 the fuel pressure against the manufacturer's specifications.
• If the pressure is low, check the fuel pump and filter for clogs or failure, and replace them as necessary.

5. Inspect Fuel Injectors

• Tools Required: Fuel injector cleaning kit (if necessary)
• Visually inspect each injector for leaks and proper seating.
• If injectors are clogged, use a fuel injector cleaning kit to clean them or replace them if they are faulty.

6. Verify Engine Coolant Temperature (ECT) Sensor

• Tools Required: Multimeter
• Disconnect the ECT sensor and measure its resistance.
• Compare the resistance reading to the manufacturer’s specifications. Replace if it is out of range.

7. Reassemble and Test

• Reconnect all components, ensuring all connections are secure.
• Reconnect the negative battery terminal.
• Start the engine and allow it to reach operating temperature.