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

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the negative terminal of the battery to ensure safety.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Smoke machine, vacuum gauge, basic hand tools.
• Use a smoke machine to introduce smoke into the intake system.
• Look for smoke escaping from hoses or gaskets, indicating leaks.
• Replace any damaged hoses or gaskets found during inspection.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, screwdriver.
• Remove the MAF sensor from the intake tract.
• Spray the MAF sensor with MAF cleaner and allow it to dry.
• Reinstall the sensor and ensure all connections are secure.

4. Check and Repair Fuel System

• Tools Required: Fuel pressure gauge, basic hand tools.
• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition to the "ON" position (do not start) and check the pressure reading; it should match manufacturer specifications.
• If pressure is low, check the fuel pump and filter for blockages or failures and replace as necessary.

5. Inspect and Clean Fuel Injectors

• Tools Required: Fuel injector cleaning kit, basic hand tools.
• Remove the fuel injectors from the rail.
• Use a cleaning kit to clean each injector according to the manufacturer's instructions.
• Reinstall the injectors and ensure proper sealing.