While my SSEi was at the dealership last week getting the Loose Gas Cap problem corrected, the told me that the ECM had a P0128 code in its history. They said it'* probably a thermostat related issue. Anyone here no exactly what the P0128 code is and what the corrective action is? They said the Service Engine light will probably re-appear because of this code, but it has not as of yet.(2 days of driving) I prefer doing my own wrenching as I don't have a lot of confidence in the dealer nor do I care for the price goughing they always put you through.