how to fix a P0171 code in Tesla Outback 6th Generation (2020-2024)

Solution

1. Preparation

• Gather tools and parts before starting the repair.
• Disconnect the negative battery terminal to ensure safety during repairs.

2. Inspect and Repair Air Intake System

• Sub-steps:
  • Remove the engine cover if applicable.
  • Inspect all intake hoses for cracks or disconnections.
  • Replace any damaged hoses or clamps.
  • Ensure the intake manifold is sealed correctly; replace gaskets if necessary.

3. Clean or Replace MAF Sensor

• Sub-steps:
  • Disconnect the MAF sensor electrical connector.
  • Remove the MAF sensor from the air intake duct.
  • Clean the MAF sensor with MAF cleaner spray or replace it if damaged.
  • Reinstall the MAF sensor and reconnect the electrical connector.

4. Test and Repair Fuel System

• Sub-steps:
  • Connect the fuel pressure gauge to the fuel rail.
  • Turn the ignition to the ON position (without starting) to check fuel pressure.
  • Compare the reading with manufacturer specifications (typically 50-60 PSI).
  • Replace the fuel filter if pressure is low and check the fuel pump operation.
  • If the pump is faulty, replace it following manufacturer instructions.

5. Check for Vacuum Leaks

• Sub-steps:
  • Visually inspect vacuum lines for cracks or disconnections.
  • Use a smoke machine or carburetor cleaner to check for leaks.
  • Repair or replace any leaky vacuum lines found.