Okay, reading through all of this and making my own conclusions. I have a 2008 G6 with 72,000 miles bought it three years ago with no issues until just recently. While driving down the highway my temp gauge dropped from a normal 220-225 down to 0 degrees. I drove it home about twenty minutes and no check engine light came on. Went to the auto store and purchased a temp sensor (ECT), disconnected my battery, and all was well. That was three weeks ago. Just yesterday the same thing happened except my check engine light came on. Now again I am only going to assume that the code is going to be that P0128. But I am going to purchase a thermostat, replace it, and see what happens anyway. If for any reason that does not work, what else should I do?
Monday, December 12th, 2016 AT 11:18 PM