what does it mean if my Tesla Model 3 Original (2017-2023) shows P0171 code

Solution

1. Preparation

• Gather required tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the vehicle battery to prevent electrical shorts.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Visually inspect all vacuum hoses connected to the intake manifold for cracks or disconnections.
  2. Replace any damaged hoses with OEM parts.
  3. Check the intake manifold gaskets for leaks and replace if necessary.

3. Check and Clean MAF Sensor

• Sub-steps:
  1. Remove the MAF sensor from the intake duct.
  2. Use MAF sensor cleaner to gently clean the sensor element.
  3. Reinstall the MAF sensor ensuring it is properly seated.

4. Test Fuel Pressure

• Sub-steps:
  1. Locate the fuel pressure test port on the fuel rail.
  2. Connect the fuel pressure gauge and turn the ignition key to the "on" position without starting the engine.
  3. Read the pressure; it should be within the manufacturer’s specifications. Replace the fuel pump if the pressure is low.

5. Inspect Fuel Injectors

• Sub-steps:
  1. Remove the fuel rail to access the fuel injectors.
  2. Clean or replace any clogged injectors using an injector cleaning kit.
  3. Reassemble the fuel rail and ensure all connections are secure.