how to fix P0171 code on Tesla Outback 4th Generation (2010-2014)

Solution

1. Preparation

• Gather all necessary tools and parts. Ensure the vehicle is parked on a flat surface and the engine is cool.
• Tools required: OBD-II scanner, socket set, fuel pressure gauge, multimeter, cleaning supplies for MAF sensor.

2. Inspect and Repair Air Intake System

• Check for Leaks:

  • Visually inspect all hoses connected to the air intake system for cracks or loose connections.
  • Tighten any loose clamps and replace any damaged hoses.

• Inspect Throttle Body:

  • Remove the throttle body as per manufacturer guidelines.
  • Clean the throttle body using throttle body cleaner and a soft cloth. Ensure that the area around the throttle plate is free of carbon deposits before reinstallation.

3. Test and Clean MAF Sensor

• Remove MAF Sensor:

  • Disconnect the MAF sensor connector and remove it from the air intake assembly.

• Clean MAF Sensor:

  • Use MAF sensor cleaner to spray the sensor elements. Avoid touching the sensor with fingers or tools.
  • Allow the sensor to dry completely before reinstalling.

4. Check Fuel System

• Test Fuel Pressure:

  • Connect the fuel pressure gauge to the fuel rail. Start the engine and check the pressure against manufacturer specifications.
  • If the pressure is low, check the fuel pump and fuel filter for issues and replace as necessary.

• Inspect Fuel Injectors:

  • Remove and inspect the fuel injectors for clogs or leaks.
  • Clean or replace injectors based on condition. Ensure they are properly seated when reinstalled.

5. Check Oxygen Sensors

• Inspect and Test:
  • Disconnect the oxygen sensors and test their voltage output with a multimeter. Compare readings to manufacturer specifications.
  • Replace any faulty oxygen sensors.