how to fix P0171 code on 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 to prevent any electrical issues.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, screwdrivers, vacuum gauge
• Inspect all hoses and connections in the air intake system for leaks or damage.
• Replace any damaged hoses or connections.
• Tighten any loose clamps or fittings.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, Torx screwdriver
• Disconnect the MAF sensor electrical connector.
• Remove the MAF sensor from the air intake tube.
• Spray the MAF sensor with MAF cleaner and let it dry completely.
• Reinstall the MAF sensor and reconnect the electrical connector.

4. Check and Adjust Fuel Pressure

• Tools Required: Fuel pressure gauge
• Attach the fuel pressure gauge to the fuel rail service port.
• Turn the ignition on (do not start the engine) and read the fuel pressure on the gauge.
• If the pressure is below the manufacturer's specification, check the fuel pump and filter for issues and replace if necessary.

5. Inspect Vacuum Lines

• Tools Required: Visual inspection tools
• Check all vacuum lines for cracks, leaks, or disconnections.
• Replace any damaged vacuum lines.

6. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0171 code from the vehicle's computer.