'Service Engine Soon' Light of 2000 540I - P1622
Ok guys, you were very helpful on the last one - here is another one of those 'lights' questions for 540I (I wish I could turn them all off!).
I have been having the 'low coolant' message on and off. I checked it twice but the level was fine. Last week I got the 'service engine soon' and went to Autozone - they told me it was P1622 but could not reset it.
I added some coolant (just in case) but the light is still on. Should I reset it and if so, how? From Autozone they told me they could not do it (not sure why, they used to to that with my 99 Passat). Would I expect the light to go off on its own (when I fix it or does it need to be reset necessarily - if so, how)?
Someone had mentioned on the boards that this is most likely thermostat (that is going bad, had gone bad). What would be the sympthoms for that? The car seems to be running fine, engine temp is in the middle...
Thanks anyone and everyone who can help out!