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

Solution

1. Preparation

• Gather the necessary tools and parts.
• Disconnect the negative terminal of the 12V battery to ensure safety.
• Allow the vehicle to cool down if it has been running.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Visually inspect the air intake duct and hoses for any visible damage or loose connections.
  2. Tighten any loose clamps and replace damaged hoses or ducts as necessary.
  3. If a leak is detected, replace the affected components.

3. Clean or Replace MAF Sensor

• Sub-steps:
  1. Locate the MAF sensor within the air intake system.
  2. Disconnect the electrical connector from the MAF sensor.
  3. Remove the MAF sensor by unscrewing it from its housing.
  4. Clean the MAF sensor using a dedicated MAF cleaner spray. Allow it to dry.
  5. If damaged, replace with a new MAF sensor and reconnect the electrical connector.

4. Inspect Fuel System

• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail test port.
  2. Turn the ignition to the "ON" position (do not start the engine) and check the fuel pressure. It should match the manufacturer's specifications.
  3. If the pressure is low, check the fuel pump and fuel filter for issues. Replace as necessary.

5. Inspect Fuel Injectors

• Sub-steps:
  1. Locate the fuel injectors and inspect them for any signs of leakage.
  2. Use a fuel injector cleaning kit to clean the injectors if they are clogged.
  3. Replace any injectors that are found to be faulty.