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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the parking brake is engaged.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, screwdrivers
• Instructions:
  1. Remove the engine cover (if applicable) using the appropriate socket.
  2. Inspect the intake hoses for cracks or loose connections; replace any damaged hoses.
  3. Reattach all connections securely and ensure the air filter is clean.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, torx driver
• Instructions:
  1. Locate the MAF sensor in the air intake duct.
  2. Disconnect the electrical connector and remove the sensor using the torx driver.
  3. Spray the MAF sensor with MAF cleaner and allow it to dry completely.
  4. Reinstall the sensor and reconnect the electrical connector.

4. Check Fuel System

• Tools Required: Fuel pressure gauge, multimeter
• Instructions:
  1. Connect the fuel pressure gauge to the fuel rail test port.
  2. Turn the ignition to the "ON" position without starting the engine to check fuel pressure; it should meet manufacturer specifications (usually around 50-60 psi).
  3. If pressure is low, inspect the fuel pump and filter for functionality and replace as needed.

5. Inspect and Test Fuel Injectors

• Tools Required: Fuel injector cleaner, multimeter
• Instructions:
  1. Remove the fuel injectors from the rail.
  2. Clean the injectors using a fuel injector cleaning kit.
  3. Test each injector's resistance with a multimeter; it should be within specifications (typically 12-16 ohms).
  4. Replace any faulty injectors.