2008 Ascender , . No CEL currently . Temp gauge will go to zero at times and getting a P0128 at the same time . I find it interesting that the stat could cause this to happen . If that is the case it must be some stupid ECU programming that says when you see this code shut off the temp gauge . I have read in more than 1 place of people having the same issue and it even goes so far as to say if and when they cleared the code the gauge and AC started working again .
So the fix for this is the stat which is the normal for a p0128 code ? Anyone else had this problem and fix it with a new thermostat ? It could be the stat in my case , after driving it for 15 -20 minutes on my code reader which has live data the ECT was only reading about 175 degrees which is low I think for this vehicle . At this point I have cleared the codes to see if it comes back as it is supposed to be in the 20's again tomorrow and want to see if it comes back . So should I lean towards the stat and not say the ECT sensor ? I was getting a reading from ECT when the gauge said zero so that is a plus to rerplace the stat . Any insight appreciated.
So the fix for this is the stat which is the normal for a p0128 code ? Anyone else had this problem and fix it with a new thermostat ? It could be the stat in my case , after driving it for 15 -20 minutes on my code reader which has live data the ECT was only reading about 175 degrees which is low I think for this vehicle . At this point I have cleared the codes to see if it comes back as it is supposed to be in the 20's again tomorrow and want to see if it comes back . So should I lean towards the stat and not say the ECT sensor ? I was getting a reading from ECT when the gauge said zero so that is a plus to rerplace the stat . Any insight appreciated.