how to fix P0174 code on Tesla Outback 6th Generation (2020-2024)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and set the parking brake.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Inspect and Repair Air Intake System

• Tools Required: Basic hand tools, vacuum gauge
• Sub-steps:
  1. Visually inspect all air intake hoses and connections for cracks or disconnections.
  2. Use a vacuum gauge to check for leaks in the intake system; repair any leaks found.
  3. Replace any damaged hoses or components.

3. Check and Clean MAF Sensor

• Tools Required: MAF cleaner or isopropyl alcohol, soft cloth
• Sub-steps:
  1. Locate the MAF sensor in the air intake system.
  2. Disconnect the electrical connector and remove the sensor.
  3. Spray MAF cleaner onto the sensor element and allow it to air dry completely.
  4. Reinstall the MAF sensor and reconnect the electrical connector.

4. Test Fuel Pressure

• Tools Required: Fuel pressure gauge
• Sub-steps:
  1. Connect the fuel pressure gauge to the fuel rail's test port.
  2. Turn the ignition to the "ON" position (without starting) and record the fuel pressure.
  3. Compare the reading to the manufacturer's specifications (typically 50-60 psi).
  4. If pressure is low, check the fuel pump and filter for problems, and replace them if necessary.

5. Inspect Fuel Injectors

• Tools Required: Basic hand tools, fuel injector cleaning kit (if needed)
• Sub-steps:
  1. Remove the fuel rail with injectors attached from the engine.
  2. Inspect injectors for clogs or leaks; clean them using a fuel injector cleaning kit if necessary.
  3. Reinstall the fuel rail and ensure all connections are secure.

6. Replace Faulty Oxygen Sensors (if necessary)

• Tools Required: O2 sensor socket, basic hand tools
• Sub-steps:
  1. Locate the upstream and downstream oxygen sensors for Bank 2.
  2. Disconnect the electrical connectors and use an O2 sensor socket to remove the sensors.
  3. Install new sensors and reconnect the electrical connectors.