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

Solution

1. Preparation

• Gather tools and parts required for repairs.
• Disconnect the vehicle's battery to ensure safety while working on electrical components.
• Tools Required: OBD-II scanner, socket set, multimeter, fuel pressure gauge, vacuum gauge, cleaning supplies.

2. Inspect and Repair Air Intake System

• Remove the engine cover (if applicable) using a socket set.
• Visually inspect the intake hoses and connections for signs of wear or damage. Replace any faulty hoses.
• If any leaks are found, use appropriate sealants or replace components as necessary.

3. Clean or Replace MAF Sensor

• Locate the MAF sensor in the air intake system.
• Disconnect the electrical connector and remove the MAF sensor using the appropriate socket.
• Clean the MAF sensor with MAF cleaner spray. Allow it to dry completely before reinstallation.
• If cleaning does not resolve the issue, replace the MAF sensor with a new one.

4. Check Fuel System

• Connect a fuel pressure gauge to the fuel rail to check the fuel pressure.
• Compare the reading with manufacturer specifications. If the pressure is low, inspect the fuel pump and fuel filter for blockages or failures.
• Replace the fuel filter if clogged, and consider replacing the fuel pump if necessary.

5. Inspect Fuel Injectors

• Test fuel injectors for proper operation using a multimeter or injector tester.
• If any injectors are found to be faulty, replace them with new ones following the manufacturer’s torque specifications.

6. Verify Engine Vacuum

• Use a vacuum gauge connected to a vacuum port to check for leaks.
• If the gauge reads lower than normal, inspect and replace any damaged vacuum hoses or gaskets as necessary.