what does error code P0171 mean for my Tesla Model S Original (2012-2020)?

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

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, vacuum gauge, basic hand tools, cleaning supplies.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to avoid electrical shock.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Remove the engine cover if necessary to access the intake manifold.
  2. Visually inspect the air intake ducting for cracks or loose fittings.
  3. Tighten any loose clamps and replace damaged components.
  4. Clean the MAF sensor using MAF cleaner spray.

3. Test and Repair Fuel System

• Sub-steps:
  1. Connect the fuel pressure gauge to the fuel rail.
  2. Start the engine and monitor fuel pressure; it should meet manufacturer specifications.
  3. If pressure is low, check the fuel pump and filter for blockages or failures.
  4. Inspect and clean fuel injectors if they are clogged.

4. Inspect Vacuum Hoses and Connections

• Sub-steps:
  1. Visually inspect all vacuum hoses connected to the intake manifold.
  2. Replace any cracked or damaged hoses.
  3. Ensure all connections are tight and secure.

5. Verify Oxygen Sensor Functionality

• Sub-steps:
  1. Use a multimeter to check the voltage output of the upstream oxygen sensor.
  2. If readings are out of range, replace the oxygen sensor.
  3. Reconnect all electrical connectors securely.