my Tesla Model 3 Highland (2024-present) has a P0171 code how can I fix it

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool down before starting work.

2. Inspect and Repair Air Intake System

• Sub-steps:
  • Visually inspect all intake hoses and connections for cracks or disconnections.
  • Replace any damaged hoses or tighten loose clamps.
• Tools Required: Socket set, pliers

3. Clean or Replace MAF Sensor

• Sub-steps:
  • Locate the MAF sensor in the air intake system.
  • Disconnect the electrical connector and remove the sensor from its housing.
  • Clean the MAF sensor with MAF cleaner spray. If damaged, replace it with a new sensor.
• Tools Required: Screwdriver, MAF cleaner spray
• Safety Warnings: Do not touch the sensor element with fingers to avoid contamination.

4. Check and Adjust Fuel Pressure

• Sub-steps:
  • Connect the fuel pressure gauge to the fuel rail service port.
  • Turn the ignition to the "on" position (without starting the engine) to check the pressure reading.
  • If pressure is low, check the fuel pump and filter for issues.
• Tools Required: Fuel pressure gauge
• Safety Warnings: Fuel is flammable; work in a well-ventilated area and avoid sparks.

5. Inspect and Clean Fuel Injectors

• Sub-steps:
  • Remove fuel injectors from the fuel rail.
  • Clean the injectors using an injector cleaning kit, or replace them if they are clogged or leaking.
• Tools Required: Injector cleaning kit, socket set

6. Vacuum Leak Inspection

• Sub-steps:
  • Inspect all vacuum lines for cracks or disconnections.
  • Use a smoke machine to detect any hidden vacuum leaks.
  • Replace any damaged vacuum lines.
• Tools Required: Smoke machine (if available), visual inspection tools