Just acquired a 2003 TT Coupe for my daughter. Hd it 2 days; it's now
showing a Check Engine light
Took it to Autozone to get scanned, they tell me the code is P2181 and
that it means low coolant.
http://www.hallsautoonline.com/obd_ii_code_definitions.htm , it means
"Cooling system performance""
BUT - coolant tank is showing 3/4 full. I tried disconnecting the
battery for 10 sec to reset the codes - no change. I _did_
reset everything else, but hte check engine light is still on.
Also - there's a constant hum from near the cooling fan - looks like a
small inline pump in the coolant line. It doesn't seem to shut off -
was running nearly an hour after we returned from the store.
What's happening here?