1998 S70 @85K, 2 weeks ago the check engine light came on with a code P0116. I installed new thermostat and coolant sensor, erased code, all was well. Now 500 miles later, the check engine light came on with a code P0118, "engine coolant temp circuit high input". I checked wiring & connector at sensor, erased code, but code returned after next cold start. Each time, check engine light came on and set a code after starting the car first thing on a very cold morning. What should I be looking for in the "temp sensor Circuit? Thanks Much, Phil