2010 mini base model P0597
 

Just replaced the t-stat - filled system w/ Airlift so no air bubbles- P0597 won't clear.
voltage at t-stat connector sytem voltage on 1 pin- 3.5V on the other pin which I believe is pulse width modulated. is there a resistance reading for known good t-stat? old one measures 6 M ohms. Thanks JT

I'd check over your harness to make sure it isn't damaged: http://forums.pelicanparts.com/mini-discussion-forum/939966-question-coolant-temperature-oil-pressure-sensor-replacement.html.