Check engine light
Well I was wondering if this would happen and it did, I got a PO128 this morning, thermostat slow to reach operating temp. I have a modified stat and a supercooler, anybody else had this code? It's only been in the 40's here over night so far, as long as I know what it is I can deal with it I guess, I'm sure it will be more frequent in the middle of winter. I cleared it and it hasn't came back the last 2 nights, which have only been in the 50's.