Help!!!!

I am getting a computer code telling me that I have a bad evaporator purge solenoid circuit or driver. OK, just the bottom line. How much is the part and how much to replace? It's a '97 T and C 3.3 liter. Also, how long can I drive it before it actually fails? (Service engine soon light is on)
Thanks!!!!

The solenoid is about $35 at a dealer. It is located in the engine compartment and is really easy to change so you can do it yourself. It only takes a couple of screws and removal of a couple vacuum hoses to replace.

The solenoid is about $35 at a dealer. It is located in the engine compartment and is really easy to change so you can do it yourself. It only takes a couple of screws and removal of a couple vacuum hoses to replace.
Hey, thanks a lot, that was really helpful.