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

Solution

1. Preparation

• Gather necessary 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

• Tools Required: Socket set, screwdrivers, vacuum gauge.
• Inspect all air intake hoses and connections for cracks or loose fittings.
• Replace any damaged hoses or fittings.
• Reconnect all components securely.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner (or isopropyl alcohol), screwdriver.
• Remove the MAF sensor from the air intake duct using the appropriate screwdriver.
• Spray the MAF sensor with MAF cleaner and allow it to dry completely.
• Reinstall the MAF sensor and ensure it is securely fastened.

4. Test Fuel Pressure

• Tools Required: Fuel pressure gauge.
• Locate the fuel rail test port and attach the fuel pressure gauge.
• Turn the ignition to the "ON" position (do not start the engine) and check the fuel pressure reading.
• If the pressure is below specifications, inspect the fuel pump and filter for potential replacement.

5. Inspect Fuel Injectors

• Tools Required: Injector cleaner, multimeter.
• Remove the fuel injectors from the fuel rail after relieving the pressure.
• Use an injector cleaner to clean the injector nozzles.
• Test the injectors with a multimeter to ensure they are operating correctly; replace any faulty injectors.

6. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear any error codes.
• Start the engine and let it idle to ensure smooth operation.