My check engine light came on and I checked it with my code tester and got 16500 which says engine coolant temperature circuit-range/performance. I have noticed that the temp gauge does not seem to get much off the cold mark.I find some people say it is theG62 sensor and some say the F76. Still otherssay it may be the thermostat. Anyone had a similar problem? The car is a 1996 Cabriolet, 2.8L V6 with 77000 miles.