how to fix P0171 code in Tesla Model 3 Original (2017-2023)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the ignition is turned off.
• Disconnect the battery to prevent electrical shorts.

Tools Required:

• OBD-II scanner
• Fuel pressure gauge
• Socket set
• Torque wrench
• Screwdrivers
• Cleaning supplies (e.g., MAF cleaner)

2. Inspect and Repair Intake System

• Vacuum Leak Inspection:

  • Visually inspect all vacuum hoses and connections for cracks or loose fittings.
  • Use a smoke machine to detect leaks if necessary.
  • Tighten any loose connections or replace damaged hoses.

• Intake Manifold Gasket:

  • Remove the intake manifold if the gasket is suspected to be leaking.
  • Replace the gasket and torque to manufacturer specifications.

3. Fuel System Check

• Fuel Pressure Testing:

  • Connect the fuel pressure gauge to the fuel rail.
  • Start the engine and monitor the fuel pressure; it should match manufacturer specifications.
  • If pressure is low, inspect the fuel pump and fuel filter for issues.

• Fuel Injector Inspection:

  • Remove the fuel rail to access the injectors.
  • Inspect each injector for clogs; clean or replace as necessary.
  • Reinstall the fuel rail and torque to specifications.

4. MAF Sensor Maintenance

• Cleaning:
  • Disconnect the MAF sensor connector.
  • Remove the MAF sensor from the intake.
  • Spray MAF cleaner on the sensor element to remove dirt or debris.
  • Allow to dry completely before reinstallation.

5. Throttle Body Inspection

• Cleaning:
  • Remove the intake ducting to access the throttle body.
  • Clean the throttle body using throttle body cleaner to remove carbon deposits.
  • Ensure the throttle plate opens and closes freely.