how to fix the P0171 code on my Tesla Outback 6th Generation (2020-2024) engine?

Solution

1. Preparation

• Gather tools and safety equipment.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Safety Warning: Disconnect the battery before working on electrical systems.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Visually inspect the air intake hoses and connections for cracks or looseness.
  2. Tighten any loose clamps and replace any damaged hoses.
  3. If leaks are found, replace affected components with OEM parts.

3. Clean or Replace MAF Sensor

• Sub-steps:
  1. Remove the MAF sensor from its housing (typically requires a Torx or Phillips screwdriver).
  2. Clean the sensor element with MAF cleaner spray (do not use any other cleaners).
  3. If the sensor is damaged or does not respond after cleaning, replace it with a new one.

4. Test and Repair Fuel System

• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail.
  2. Turn the ignition to the "ON" position without starting the engine to check the fuel pressure.
  3. If pressure is below specifications, check the fuel pump and fuel filter for issues.
  4. Replace the fuel filter and fuel pump if necessary.

5. Inspect and Clean Fuel Injectors

• Sub-steps:
  1. Remove the fuel rail to access the injectors (ensure to relieve fuel pressure first).
  2. Inspect each injector for clogs or leaks; clean with an injector cleaning solvent if necessary.
  3. Replace any defective injectors with new ones, ensuring proper fitment.