Recently bought a 2003 TT; runs grat, but has a check engine light obd code is p2181, which transates to "cooling system performance"- but not very specific.
Contacted previous owner, who has tried the following:
replaced thermostat replaced temp sensor on top of motoron drivers' side replaced cooling fan module (big square thing on the bottomof the motor)
Since we stillhave hte light, I assume none of these were the problem. So - I'm hoping someone else out there can provide suggestions on where to look next.
Second question (possibly related) - sometimes the coolant pump will stay on for over an hour after the car's parked - is this normal?