Location of canister purge solenoid on 1996 Buick Century

Computer at Auto Zone said it has detected vacuum flow to fuel tank pressure sensor during a system sealed condition, Failed canister purge solenoid or FTP sensor

Asked by for the 1996 Buick Century
The canister purge solenoid and vacuum switch are mounted on a bracket behind the ignition coils. The vacuum flow fault could also be cause by a faulty vacuum switch.