what does the P0171 code mean for my Tesla Model 3 Highland (2024-present)?

Solution

1. Preparation

• Disconnect the negative battery terminal to ensure safety during repairs.
• Gather tools and parts required for the repair.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Remove the air intake cover (if applicable) using a socket set.
  2. Check all hoses and clamps for signs of wear or damage; replace any damaged components.
  3. Reassemble the air intake components securely.

3. Test and Replace MAF Sensor (if necessary)

• Sub-steps:
  1. Disconnect the MAF sensor connector.
  2. Use a multimeter to check the voltage output; refer to the vehicle's service manual for specifications.
  3. If the MAF sensor is faulty, remove it by unscrewing it from the air intake assembly.
  4. Install a new MAF sensor and reconnect the electrical connector.

4. Check and Adjust Fuel Pressure

• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail.
  2. Start the engine and observe the pressure reading; compare it to the manufacturer's specifications.
  3. If the pressure is low, inspect the fuel pump and fuel filter for issues; replace if necessary.

5. Inspect Fuel Injectors

• Sub-steps:
  1. Remove the fuel rail to access the injectors.
  2. Clean any clogged injectors using a specialized injector cleaning solution.
  3. Reinstall the fuel rail and ensure all connections are secure.