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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Visually inspect all hoses and connections in the air intake system for cracks or loose fittings.
  2. Replace any damaged hoses or tighten loose connections.
  3. If necessary, replace the intake manifold gasket.

3. Clean or Replace MAF Sensor

• Sub-steps:
  1. Locate the MAF sensor, usually found in the air intake duct.
  2. Disconnect the electrical connector and unscrew the sensor from the duct.
  3. Clean the MAF sensor using MAF cleaner spray. Do not touch the sensor element.
  4. If the sensor is damaged, replace it with a new one.

4. Check Fuel Pressure

• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail.
  2. Turn the ignition on (do not start the engine) and note the pressure reading.
  3. Compare the reading with manufacturer specifications; if low, check the fuel pump and filter.
  4. Replace the fuel filter if clogged.

5. Inspect and Test Fuel Injectors

• Sub-steps:
  1. Remove the fuel injectors from the fuel rail.
  2. Use an injector cleaning kit to clean the injectors or replace them if they are faulty.
  3. Reinstall the injectors with new O-rings.

6. Verify O2 Sensor Operation

• Sub-steps:
  1. Inspect the wiring and connector of the oxygen sensor for damage.
  2. Test the sensor with a multimeter to ensure it is functioning properly.
  3. Replace the O2 sensor if it fails the test.