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

Solution

1. Preparation

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

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Visually inspect the air intake hoses and connections for cracks or loose fittings.
  2. Replace any damaged hoses or clamps.
  3. Check the air filter; replace it if it is clogged or dirty.

3. Clean or Replace MAF Sensor

• Sub-steps:
  1. Locate the MAF sensor in the air intake duct.
  2. Disconnect the electrical connector and remove the sensor from the duct.
  3. Use MAF cleaner to spray the sensor; allow it to dry completely.
  4. Reinstall the MAF sensor and reconnect the electrical connector.

4. Check and Adjust Fuel Pressure

• Sub-steps:
  1. Attach the fuel pressure gauge to the fuel rail test port.
  2. Turn the ignition to the "ON" position (do not start the engine) and observe the pressure reading.
  3. If the pressure is below specifications, check the fuel pump and filter. Replace if necessary.

5. Inspect and Test Fuel Injectors

• Sub-steps:
  1. Remove the fuel injectors from the engine.
  2. Use a multimeter to test the resistance of each injector; compare to specifications.
  3. Clean the injectors using an ultrasonic cleaner, or replace them if they are faulty.

6. Verify Oxygen Sensor Functionality

• Sub-steps:
  1. Use the OBD-II scanner to monitor live data from the O2 sensors.
  2. Check for proper voltage signal (typically between 0.1 to 0.9 volts for upstream sensors).
  3. Replace the oxygen sensor if it is not functioning correctly.