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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is off and cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, pliers
• Check for any cracks or breaks in the intake hoses and replace any damaged sections.
• Tighten any loose clamps or connections in the air intake system.
• If any vacuum hoses are found to be damaged, replace them.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner or isopropyl alcohol, lint-free cloth
• Remove the MAF sensor from the intake duct.
• Spray the MAF sensor with MAF cleaner to remove dirt and debris.
• Allow the sensor to dry completely before reinstalling. If cleaning does not resolve the issue, replace the MAF sensor.

4. Fuel System Inspection

• Tools Required: Fuel pressure gauge, socket set
• Connect the fuel pressure gauge to the fuel rail and turn the ignition to the "on" position to check for proper fuel pressure.
• If the pressure is below specifications, inspect the fuel pump and filter, replacing as necessary.
• Check the fuel injectors for clogs; use a fuel injector cleaner if needed or replace them if they are faulty.

5. Oxygen Sensor Check

• Tools Required: Socket set
• Inspect the upstream oxygen sensor for any signs of damage or contamination.
• If the sensor is faulty, replace it with a new one, ensuring proper torque specifications are followed during installation.