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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the vehicle's 12V battery for safety.
• Ensure the engine is cool before beginning work.

2. Inspect and Repair Air Intake System

• Tools Required: Screwdriver set, pliers, flashlight.
• Steps:
  1. Visually inspect all air intake hoses and connections for cracks or disconnections.
  2. Replace any damaged hoses or gaskets identified during the inspection.
  3. Ensure the air filter is clean and replace it if necessary.

3. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner, screwdriver.
• Steps:
  1. Locate the MAF sensor in the air intake system.
  2. Disconnect the electrical connector from the MAF sensor.
  3. Remove the MAF sensor using the screwdriver.
  4. Clean the sensor with MAF cleaner and let it dry.
  5. Reinstall the MAF sensor and reconnect the electrical connector.

4. Check and Adjust Fuel Pressure

• Tools Required: Fuel pressure gauge.
• Steps:
  1. Connect the fuel pressure gauge to the fuel rail.
  2. Turn the ignition to the "ON" position (do not start the engine) to check fuel pressure.
  3. Compare the reading to manufacturer specifications (consult service manual).
  4. If the pressure is low, inspect the fuel pump and replace it if necessary.

5. Inspect and Clean Fuel Injectors

• Tools Required: Injector cleaning kit, screwdriver.
• Steps:
  1. Disconnect the fuel rail from the engine.
  2. Remove the fuel injectors from the fuel rail.
  3. Use an injector cleaning kit to clean the injectors thoroughly.
  4. Reinstall the cleaned injectors and reconnect the fuel rail.