how to fix P0171 code in Tesla Model 3 Original (2017-2023)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal.

2. Inspect Air Intake System

• Tools Required: Socket set, flashlight
• Remove the engine cover (if applicable) and visually inspect the air intake duct and connections for any cracks or disconnections.
• Tighten or replace any loose or damaged components.

3. Check Fuel Pressure

• Tools Required: Fuel pressure gauge, safety glasses
• Locate the fuel rail service port and attach the fuel pressure gauge.
• Turn the ignition to the "ON" position (do not start the engine) and check the fuel pressure reading. It should match the manufacturer's specifications (typically around 50-60 psi for Tesla).
• If pressure is low, inspect the fuel pump and filter for failures.

4. Clean the MAF Sensor

• Tools Required: MAF sensor cleaner, soft cloth
• Locate the MAF sensor in the intake path (usually between the air filter and the throttle body).
• Remove the MAF sensor carefully and spray MAF sensor cleaner on the element. Do not touch the sensor element.
• Allow it to dry completely before reinstalling.

5. Inspect Vacuum Lines

• Tools Required: Visual inspection
• Check all vacuum lines connected to the intake manifold for cracks, leaks, or disconnections.
• Replace any damaged lines found during inspection.

6. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0171 code and any other stored codes.
• Start the vehicle and allow it to reach operating temperature.