how to fix P0171 code in Tesla Model 3 Original (2017-2023)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative terminal of the battery to ensure safety.
• Allow the vehicle to cool down before starting work.

2. Inspect and Repair Air Intake System

• Inspect for Leaks
  • Visually check all hoses and connections in the air intake system.
  • Use a smoke machine if available to identify hidden vacuum leaks.
• Repair or Replace
  • Replace any cracked or damaged hoses.
  • Tighten any loose clamps or connections.

3. Clean or Replace MAF Sensor

• Remove MAF Sensor
  • Locate the MAF sensor in the air intake track.
  • Disconnect the electrical connector and remove the sensor using a Torx screwdriver.
• Clean Sensor
  • Spray MAF sensor cleaner onto the sensor elements. Do not touch them.
  • Allow the sensor to dry completely before reinstalling.
• Reinstall MAF Sensor
  • Reattach the MAF sensor and secure it with the screws. Reconnect the electrical connector.

4. Inspect Fuel System

• Check Fuel Pressure
  • Connect a fuel pressure gauge to the fuel rail.
  • Turn the ignition to the "ON" position without starting the engine and check the fuel pressure reading against specifications.
• Replace Fuel Filter (if necessary)
  • If fuel pressure is low, replace the fuel filter.
• Inspect Fuel Injectors
  • Remove the fuel rail to access the injectors.
  • Clean injectors using a professional injector cleaning kit or replace them if they are faulty.

5. Check Oxygen Sensors

• Test Oxygen Sensors
  • Use a multimeter to check the voltage output of the upstream oxygen sensor.
  • If the readings are not within specifications, consider replacing the sensor.