how to fix P0171 code in Tesla Model 3 Highland (2024-present)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is off.
• Disconnect the negative terminal of the battery to prevent electrical issues.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, pliers, flashlight
• Inspect the air intake ducting and throttle body for any signs of wear or damage.
• Tighten any loose clamps and replace any cracked hoses or ducts with new OEM parts.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, Torx screwdriver
• Disconnect the electrical connector from the MAF sensor.
• Remove the MAF sensor from the intake system.
• Spray the MAF sensor with a specialized cleaner and allow it to dry completely before reinstalling.
• If the sensor is damaged, replace it with an OEM part.

4. Check and Adjust Fuel Pressure

• Tools Required: Fuel pressure gauge, wrench set
• Attach the fuel pressure gauge to the fuel rail service port.
• Turn the ignition to the ON position without starting the engine and check the fuel pressure reading.
• If the pressure is below manufacturer specifications, inspect the fuel pump and filter for issues and replace as necessary.

5. Inspect and Replace Vacuum Hoses

• Tools Required: Pliers, vacuum hose replacement kit
• Visually inspect all vacuum hoses for cracks or disconnections.
• Replace any damaged hoses with new OEM hoses.

6. Reconnect Battery and Clear Codes

• Reconnect the negative terminal of the battery.
• Use the OBD-II scanner to clear the P0171 code and any other related codes.
• Start the engine and monitor for any reoccurrence of the code.