how to fix P0171 lean 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.
• Disconnect the negative battery cable to prevent electrical shocks.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps
• Using the vacuum gauge, test for leaks in the intake system.
• Inspect all hoses and gaskets for cracks or disconnections.
• Replace any damaged hoses or gaskets, ensuring a secure fit.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, small screwdriver
• Remove the MAF sensor from the air intake duct.
• Spray the MAF sensor with MAF cleaner and allow it to dry completely.
• Reinstall the MAF sensor ensuring it is securely connected.

4. Test and Repair Fuel System

• Tools Required: Fuel pressure gauge
• 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 low, inspect the fuel pump and filter for clogs or malfunctions; replace if necessary.

5. Inspect Fuel Injectors

• Tools Required: Injector cleaner kit, multimeter
• Test the fuel injectors using a multimeter for resistance. Compare readings to specifications.
• Clean the injectors using an injector cleaner kit or replace faulty injectors as necessary.

6. Reconnect Battery and Clear Codes

• Reconnect the negative battery cable.
• Use the OBD-II scanner to clear the P0171 code and any other related codes.