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

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

Solution

1. Preparation

• Gather tools and parts required for repair.
• Disconnect the vehicle's 12V battery to ensure safety during repairs.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  1. Visually inspect all vacuum hoses for cracks and connections.
  2. Use a smoke machine or carburetor cleaner to identify leaks.
  3. Replace any damaged hoses or gaskets.
• Tools Required: Smoke machine, pliers, hose clamps.

3. Clean or Replace MAF Sensor

• Sub-steps:
  1. Locate the MAF sensor within the intake system.
  2. Disconnect the electrical connector.
  3. Remove the sensor using a socket set.
  4. Clean the sensor with MAF cleaner or replace it if damaged.
• Tools Required: Socket set, MAF cleaner spray.

4. Check and Repair Fuel Delivery

• Sub-steps:
  1. Use a fuel pressure gauge to check fuel pressure at the injector rail.
  2. If pressure is low, inspect the fuel pump and fuel filter.
  3. Test fuel injectors for proper operation using a multimeter.
• Tools Required: Fuel pressure gauge, multimeter.

5. Inspect Engine Coolant Temperature Sensor

• Sub-steps:
  1. Locate the engine coolant temperature sensor.
  2. Disconnect the electrical connector and remove the sensor.
  3. Test the resistance with a multimeter and compare it to specifications.
  4. Replace the sensor if necessary.
• Tools Required: Multimeter, socket set.