how to fix the P0171 code on my Tesla Model S Original (2012-2020)?

Learn how to diagnose and fix P0171 engine too lean issue in Tesla Model S (2012-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and turn off the ignition.
• Disconnect the negative terminal of the battery for safety.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Inspect the air intake hose and connections for signs of wear or damage.
  3. Tighten any loose clamps and replace damaged hoses.
  4. Reinstall any components removed during inspection.

3. Clean or Replace MAF Sensor

• Sub-steps:
  1. Locate the MAF sensor in the air intake duct.
  2. Disconnect the electrical connector and remove the sensor.
  3. Clean the sensor with MAF cleaner spray; do not touch the sensor element.
  4. If damaged, replace the MAF sensor with a new one.
  5. Reinstall the MAF sensor and reconnect the electrical connector.

4. Test Fuel System Pressure

• Sub-steps:
  1. Locate the fuel rail and attach a fuel pressure gauge.
  2. Turn the ignition to the "ON" position (do not start) and check the pressure reading.
  3. Compare the reading to manufacturer specifications; if low, inspect the fuel pump and fuel filter.
  4. If necessary, replace the fuel pump or filter.

5. Inspect and Repair Vacuum Lines

• Sub-steps:
  1. Visually inspect all vacuum lines connected to the intake manifold for cracks or disconnections.
  2. Replace any damaged vacuum hoses.
  3. Ensure all connections are secure and properly fitted.

6. Reconnect Battery and Clear Codes

• Sub-steps:
  1. Reconnect the negative battery terminal.
  2. Use the OBD-II scanner to clear the P0171 code.
  3. Start the vehicle and allow it to idle, observing for any abnormal conditions.