If you have a loud whistling noise coming from your 2.0t TSI engine you might have a bad PCV valve. A bad PCV can also cause Fault code 0171 System Too Lean, as well as others. Take a look HERE for more info on the TSI PCV issues 2.0T TSI Intake Manifold Runner Fault Codes The Volkswagen 2.0 TSI / TFSI EA888 is a 2.0 liter four-cylinder gasoline turbocharged engine based on the EA888 series’ 1.8 TSI/TFSI. In March 2008, manufacture of the 2.0 TSI engine began. It was released to replace the existing EA113 family’s 2.0 TSI engines. .