how to fix P0174 code in Tesla Outback 5th Generation (2015-2019)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to ensure safety during repairs.
• Allow the engine to cool down before starting.

2. Inspect for Vacuum Leaks

• Use a smoke machine or carburetor cleaner to check for leaks in the intake manifold and vacuum hoses.
• Tighten or replace any loose or damaged hoses as necessary.

3. Clean or Replace MAF Sensor

• Locate the MAF sensor on the intake duct.
• Disconnect the electrical connector and remove the sensor using a Torx screwdriver.
• Clean the MAF sensor with MAF cleaner spray, allowing it to dry completely.
• Reinstall the sensor securely and reconnect the electrical connector.

4. Fuel Pressure Check

• Connect a fuel pressure gauge to the fuel rail service port.
• Turn the ignition to the ON position (do not start the engine) to check the pressure.
• Compare the reading to manufacturer specifications (typically between 40-60 PSI).
• If pressure is low, check the fuel pump and fuel filter; replace them if necessary.

5. Inspect Fuel Injectors

• Remove the engine cover to access the fuel injectors.
• Check for signs of leakage or clogging.
• If needed, remove the injectors and clean them using an ultrasonic cleaner or replace them.

6. Reassemble and Reconnect Battery

• After repairs, reassemble any components that were removed.
• Reconnect the battery terminals securely.