Hello everyone

First thing first just what is this?




Sensor with "Boost Sensor" on it in last picture. Just what is it? Could it be evap emission control system press. sensor? Or is it something else?

Aside from pictures above I have 2 codes, P0452 evap emission control system pressure sensor low input and P0116 Engine Coolant Temperature Sensor 1.

For coolant temp. sensor Im assuming it'd be back top of the engine by throttle body, right?

And for P0452 code there is no reference to it, no solution, no nothing Ive been searching all over on internet for it. And where could it be located at? In rear under the trunk by fuel tank, right?

Thank you everybody
Jesse

P.S. Its 1997 Audi A6 Quattro with vin C. Thank you again

Never mind the sensor in picture are Fuel Tank Pressure Sensor which is relate to P0452 code