I don't think the computer would have a clue about a sticking solenoid..... I know it looks for an RPM drop when it commands TCC, but, so far as I know, it doesn't monitor whether it disengages or not..... Try this trick..... drive at a steady speed, fast enough that TCC will actually engage...... and then step lightly on the brake while maintaining your speed. RPM should jump about 200 or so.... (do you have a tach??)

 

I do not have a tach, but I should be able to plug my code scanner in and monitor it with that. I'll give it a try sometime this week and update. Thanks!