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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface.
• Disconnect the vehicle's battery to prevent electrical issues.

2. Inspect and Repair Air Intake System

• Sub-steps:
  • Visually inspect all intake hoses for cracks or loose connections.
  • Use a smoke machine to detect any vacuum leaks in the intake system.
  • Replace any damaged hoses or gaskets.

3. Test and Clean MAF Sensor

• Sub-steps:
  • Locate the MAF sensor in the air intake duct.
  • Disconnect the electrical connector from the MAF sensor.
  • Remove the MAF sensor using a Torx screwdriver.
  • Clean the sensor using MAF cleaner and a soft brush. Do not touch the sensor element.
  • Reinstall the MAF sensor and reconnect the electrical connector.

4. Check and Replace Fuel Components

• Sub-steps:
  • Connect a fuel pressure gauge to the fuel rail.
  • Turn the ignition to the "ON" position without starting the engine to check fuel pressure.
  • If pressure is low, inspect and replace the fuel pump or fuel filter as needed.
  • If fuel injectors are suspected, remove and clean or replace them.

5. Reassemble and Reconnect

• Sub-steps:
  • Ensure all components are reinstalled securely.
  • Reconnect the vehicle's battery.
  • Clear the error codes using an OBD-II scanner.