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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle's battery to ensure safety while working on electrical systems.

2. Inspect and Repair Air Intake System

• Sub-steps:
  • Visually inspect the air intake hoses and connections for any signs of wear or damage.
  • Replace any damaged hoses or gaskets.
  • Ensure that the air filter is clean; if it is dirty, replace it.

3. Clean or Replace MAF Sensor

• Sub-steps:
  • Locate the MAF sensor in the air intake system.
  • Remove the MAF sensor from its housing.
  • Clean the sensor gently using MAF cleaner; allow it to dry completely.
  • If cleaning does not resolve the issue, replace the MAF sensor.

4. Check and Adjust Fuel Delivery

• Sub-steps:
  • Connect a fuel pressure gauge to the fuel rail.
  • Turn the ignition to the "On" position (do not start the engine) and check the fuel pressure; it should match the manufacturer specifications.
  • If the pressure is low, inspect the fuel pump and fuel filter; replace if necessary.
  • Check the fuel injectors for proper operation; consider using a fuel injector cleaner or replacing them if clogged.

5. Reassemble and Reconnect

• Sub-steps:
  • Reattach all components removed during the inspection and repair.
  • Reconnect the vehicle’s battery.
  • Clear any error codes using the diagnostic system.