how to fix P0171 code in Tesla Model 3 Highland (2024-present)

Solution

1. Preparation

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

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, screwdrivers, vacuum gauge
• Check all air intake hoses for cracks or leaks. Replace any damaged hoses.
• Inspect the intake manifold gasket for leaks and replace if necessary.
• Ensure all clamps are secure and not loose.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, torque wrench
• Remove the MAF sensor from the air intake duct by loosening the screws or clamps.
• Spray the MAF sensor with a specialized cleaner and allow it to dry completely.
• Reinstall the MAF sensor, ensuring it is securely fastened to the intake duct.

4. Check and Adjust Fuel Pressure

• Tools Required: Fuel pressure gauge
• Attach the fuel pressure gauge to the fuel rail test port.
• Start the engine and observe the fuel pressure readings. Refer to the manufacturer's specifications for proper pressure range.
• If the pressure is low, inspect the fuel pump and fuel filter for issues. Replace any faulty components.

5. Inspect and Clean Fuel Injectors

• Tools Required: Injector cleaning kit, socket set
• Remove the fuel injectors from the fuel rail.
• Use an injector cleaning kit to clean the injectors thoroughly or replace them if they are damaged.
• Reinstall the cleaned or new injectors, ensuring proper seating and connection.