how to fix P0171 code in Tesla Outback 5th Generation (2015-2019)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Repair Air Intake System

• Sub-steps:
  • Visually inspect the air intake hoses and connections for any signs of wear or damage.
  • Use a smoke machine to detect vacuum leaks if necessary.
  • Replace any damaged hoses or gaskets.

3. Clean or Replace MAF Sensor

• Sub-steps:
  • Remove the MAF sensor from the air intake duct.
  • Use MAF sensor cleaner to clean the sensor element. Allow it to dry completely.
  • Reinstall the MAF sensor and ensure the electrical connection is secure.

4. Test and Repair Fuel System

• Sub-steps:
  • Connect a fuel pressure gauge to the fuel rail and check the pressure against manufacturer specifications.
  • If the pressure is low, check the fuel pump operation and replace the fuel filter if clogged.
  • Inspect and clean the fuel injectors using an injector cleaning kit if necessary.

5. Replace Faulty Oxygen Sensors

• Sub-steps:
  • Identify the location of the upstream oxygen sensor(s).
  • Unplug the electrical connector and use a wrench to remove the sensor.
  • Install the new sensor, ensuring to use anti-seize compound on the threads. Torque to manufacturer's specifications.

6. Clear Codes and Test Drive

• After completing repairs, use the OBD-II scanner to clear the error codes.
• Test drive the vehicle to ensure that the check engine light does not illuminate again.