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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is parked on a level surface and the parking brake is engaged.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Repair Air Intake Components

• Air Filter Replacement:

  1. Remove the air intake cover.
  2. Take out the old air filter and inspect it for dirt or damage.
  3. Install a new air filter according to manufacturer specifications.

• Inspect and Replace Intake Hoses:

  1. Check all intake hoses for signs of wear or leaks.
  2. Replace any damaged hoses with OEM parts.

3. Clean or Replace MAF Sensor

1. Locate the MAF sensor in the air intake system.
2. Disconnect the electrical connector.
3. Remove the MAF sensor from the housing.
4. Clean the sensor using MAF sensor cleaner; do not touch the sensor elements.
5. Reinstall the sensor and reconnect the electrical connector.

4. Check Fuel System

• Fuel Pressure Test:

  1. Connect a fuel pressure gauge to the fuel rail.
  2. Turn the ignition to the ON position (do not start) and check the gauge reading against specifications.
  3. If pressure is low, inspect the fuel pump and filter for issues.

• Replace Fuel Filter (if applicable):

  1. Locate the fuel filter.
  2. Disconnect fuel lines and remove the old filter.
  3. Install a new filter, ensuring proper orientation.

5. Inspect and Replace Vacuum Lines

1. Visually check for any cracked or disconnected vacuum lines.
2. Replace any damaged lines with OEM parts.

6. Test and Replace Oxygen Sensors

1. Use a multimeter to test the voltage output of the upstream oxygen sensor.
2. If the sensor is not functioning correctly, replace it with an OEM sensor.