TCC PWM solenoid code, no problems in 97 gtp

I've got a 97 GTP that I just picked up used. It's reading a P1860 code, which says it's the torque converter clutch pulse width modulator (TCC PWM) solenoid electrical circuit. The car runs fine. Do I still need to replace the solenoid, or is the problem electrical and somewhere else? If I do need to replace it, I don't even know how to get at it. Can anyone help me?