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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the vehicle battery to ensure safety while working on electrical components.
• Allow the engine to cool before starting repairs.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Remove the engine cover if present using a socket set.
  2. Visually inspect all air intake hoses and connections for cracks or disconnections.
  3. Replace any damaged hoses or re-secure loose connections.

3. Clean or Replace MAF Sensor

• Sub-steps:
  1. Locate the MAF sensor in the air intake duct.
  2. Disconnect the electrical connector from the MAF sensor.
  3. Remove the sensor from its housing using a Torx screwdriver.
  4. Clean the MAF sensor using an appropriate MAF cleaner; allow it to dry completely.
  5. Reinstall the sensor and reconnect the electrical connector.

4. Check and Adjust Fuel Pressure

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

5. Inspect Fuel Injectors

• Sub-steps:
  1. Remove the fuel rail by disconnecting the fuel lines and electrical connectors.
  2. Inspect the fuel injectors for clogs or leaks.
  3. Clean or replace any faulty injectors as necessary.
  4. Reinstall the fuel rail and reconnect all lines and connectors.

6. Reconnect Battery and Clear Codes

• Sub-steps:
  1. Reconnect the vehicle's battery after all repairs are completed.
  2. Use the OBD-II scanner to clear the P0171 code.
  3. Start the engine and monitor for any reoccurrence of the code.