how to resolve a P0171 code in my Tesla Model 3 Original (2017-2023)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical issues during repairs.

2. Inspect Air Intake System

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Visually inspect all hoses and connections in the air intake path for cracks or loose fittings.
  3. Replace any damaged hoses or tighten loose connections.

3. Check Fuel Pressure

• Tools Required: Fuel pressure gauge
• Sub-steps:
  1. Locate the fuel rail access point.
  2. Connect the fuel pressure gauge to the access point.
  3. Turn the ignition to the ON position without starting the engine to check pressure readings.
  4. If pressure is below specifications (consult repair manual for values), consider replacing the fuel pump.

4. Inspect and Clean MAF Sensor

• Tools Required: MAF cleaner or isopropyl alcohol
• Sub-steps:
  1. Locate the MAF sensor in the air intake duct.
  2. Disconnect the electrical connector from the MAF sensor.
  3. Carefully remove the MAF sensor from its housing.
  4. Spray the MAF cleaner onto the sensor element and allow it to dry completely before reinstalling.

5. Examine Fuel Injectors

• Sub-steps:
  1. Inspect the injectors for signs of leaks or clogs.
  2. If necessary, remove the fuel rail to access the injectors.
  3. Clean or replace clogged injectors as needed.

6. Check for Vacuum Leaks

• Sub-steps:
  1. Use a smoke machine or spray soapy water around vacuum lines and intake manifold to identify leaks.
  2. Replace any damaged vacuum hoses.
  3. Tighten any loose clamps or fittings.