my Tesla Model S Plaid/Refresh (2021-present) has a P0174 lean code how do I fix this

Learn how to diagnose and fix P0174 lean code in Tesla Model S Plaid. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Safety: Disconnect the vehicle's battery before starting repairs to prevent electrical issues.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Visually inspect the air intake duct for cracks or breaks.
  2. Tighten any loose clamps and connections in the intake system.
  3. Replace any damaged hoses or components.
• Tools Required: Socket set, screwdriver set.

3. Clean or Replace MAF Sensor

• Sub-steps:
  1. Disconnect the electrical connector from the MAF sensor.
  2. Remove the sensor from the intake manifold using the socket set.
  3. Clean the sensor with MAF cleaner or replace it if damaged.
  4. Reinstall the sensor and reconnect the electrical connector.
• Tools Required: Socket set, MAF cleaner.

4. Check and Repair Vacuum Leaks

• Sub-steps:
  1. Inspect all vacuum lines for signs of wear, cracks, or damage.
  2. Use a smoke machine to detect vacuum leaks if visible inspection is inconclusive.
  3. Replace any defective vacuum lines or components.
• Tools Required: Smoke machine (optional), hose clamps.

5. Test Fuel Pressure

• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail.
  2. Turn the ignition key to the "on" position to prime the fuel system and read the pressure.
  3. If the pressure is below specifications, check the fuel pump and filter.
• Tools Required: Fuel pressure gauge.

6. Inspect Fuel Injectors

• Sub-steps:
  1. Remove the fuel rail to access the injectors.
  2. Check each injector for clogs or leaks by performing a resistance test with a multimeter.
  3. Clean or replace any faulty injectors.
• Tools Required: Multimeter, socket set, injector cleaning kit.