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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative terminal of the battery to ensure safety while working on the vehicle.

2. Inspect and Clean MAF Sensor

• Tools Required: MAF cleaner, Torx screwdriver.
• Instructions:
  1. Locate the MAF sensor in the intake duct.
  2. Remove the sensor by unscrewing the retaining screws.
  3. Use MAF cleaner to gently spray the sensor elements; avoid touching them directly.
  4. Allow the sensor to dry completely before reinstallation.

3. Check and Repair Air Intake Leaks

• Tools Required: Hose clamp pliers, vacuum gauge (optional).
• Instructions:
  1. Visually inspect all intake hoses and connections for cracks, tears, or loose fittings.
  2. If any damage is found, replace the faulty hoses or clamps.
  3. If necessary, use a vacuum gauge to check for leaks in the intake manifold.

4. Test and Replace Fuel Pump (if necessary)

• Tools Required: Fuel pressure gauge, socket set.
• Instructions:
  1. Connect the fuel pressure gauge to the fuel rail.
  2. Turn the ignition to the ON position (do not start) and check the fuel pressure against manufacturer specifications.
  3. If the pressure is low, check the electrical connections to the fuel pump and replace the fuel pump if needed.

5. Clean or Replace Throttle Body

• Tools Required: Throttle body cleaner, socket set.
• Instructions:
  1. Remove the air intake duct to access the throttle body.
  2. Disconnect the throttle body connector and unbolt it from the intake manifold.
  3. Clean the throttle body with throttle body cleaner and a soft cloth to remove carbon deposits.
  4. Reinstall the throttle body and reattach the air duct.