In the last month my Check Engine Light has gone on 3 times. Under A2 I constantly get a 1-2-3 being from what I've been told is something wrong with the ECT. Very recently when I'm driving and come to a light or stand still my vehicle idles very low or it will idle low and then recover about 100 RPMS. After about an hour later the car gets scary it starts stalling for a sec when the light goes green or it recovers with 300-400 RPM jump. But everytime I have this problem I get a Check Engine light some where. Do all signs point to the ECT and does anyone know the proper name or part number of it.