2001 Volkswagen Jetta Repair Question
Volkswagen Jetta Engine Problem
Any idea what it might be?
Check if your radiator fans are working... key on engine off, turn the a/c on. Do the fans turn on as well?
If no, check the fuses on top of the battery and test the fans manually to make sure they are not burnt out.
If the fans come on, then either the thermostat is stuck closed or the water pump is broken.
Quick way to check water pump:
Radiator fans manually checking: