my Tesla Model 3 Highland (2024-present) shows P0171 code, what does it mean?

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to ensure safety during repairs.

2. Inspect and Repair the Air Intake System

• Sub-steps:
  1. Visually inspect all hoses and connections in the air intake system for cracks or wear.
  2. Use a vacuum gauge to check for vacuum leaks.
  3. If leaks are found, replace damaged hoses and tighten loose connections.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner
• Sub-steps:
  1. Locate the MAF sensor in the intake system.
  2. Disconnect the electrical connector from the MAF sensor.
  3. Remove the MAF sensor from the intake by unscrewing it.
  4. Spray the MAF sensor with MAF cleaner and allow it to dry completely.
  5. Reinstall the MAF sensor and reconnect the electrical connector.

4. Check Fuel Pressure

• Tools Required: Fuel pressure gauge
• Sub-steps:
  1. Locate the fuel rail and connect the fuel pressure gauge to the Schrader valve.
  2. Turn the ignition to the "On" position without starting the engine to check the pressure.
  3. Compare the reading to manufacturer specifications; if it's low, check the fuel pump and filter.

5. Inspect Fuel Injectors

• Sub-steps:
  1. Remove the engine cover to access the fuel injectors.
  2. Check for any signs of fuel leaks around the injectors.
  3. Use a multimeter to test the resistance of the injectors; replace any that are outside specifications.