how to troubleshoot P0171 lean code on Tesla Outback 6th Generation (2020-2024)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.
• Ensure the engine is cool before starting any work.

2. Inspect and Replace Air Intake Components

• Sub-steps:
  • Remove the air intake duct by loosening the clamps and disconnecting any sensors.
  • Inspect the air filter; replace if dirty or clogged.
  • Check the intake manifold for leaks using a smoke test or by applying soapy water to suspect areas.
  • Reassemble the air intake components securely.

3. Test and Clean the MAF Sensor

• Sub-steps:
  • Disconnect the MAF sensor connector.
  • Remove the MAF sensor from the intake.
  • Clean the MAF sensor with MAF sensor cleaner; allow it to dry completely.
  • Reinstall the MAF sensor and reconnect the electrical connector.

4. Check and Replace Fuel System Components

• Sub-steps:
  • Connect the fuel pressure gauge to the fuel rail.
  • Start the engine and observe the fuel pressure readings.
  • If pressure is low, check the fuel pump and fuel filter; replace if necessary.
  • If injectors are faulty, remove and clean or replace them as needed.

5. Repair Vacuum Leaks

• Sub-steps:
  • Inspect all vacuum hoses connected to the intake manifold for integrity.
  • Replace any damaged or cracked vacuum lines.
  • Ensure that all connections are tight and secure.