Can any one help have code 45 on my 1994 wrx sti car is in limp mode thanks

 

Seems that is pressure duty solenoid.

Quote from other forum "For those who get this code in the future, I replaced the brown coloured solenoid (purge system solenoid I'm led to believe) on the drivers side strut tower on the same bracket as the boost control and map sensor and all is back to normal."