Hi, I have a 96 Cabrio and the engine light code says there is something wrong withEngine Coolant Temp Circuit.The check engine light went off after I got my fluids replaced and then I hit a bump and it went back on. My ideas:Air bubble in coolant line, the wire/sensor connection and this may sound crazy - but, could there be too much coolant causing a bad read?Also - my dashboard lightsturn off when I am braking in traffic. Maybeit's all connected to an electrical problem?
Thanks for any help -First timeAudi owner andlikehow they hid the sensor plugunder the backseat ashtray.

 

heated o2 sensor 1 bank 2 low voltage/air leak problem could be intake/exhaust leak ( could be the flexi hose on the exhaust ) most common on the FWD

 

Doesn't seem like something I can test myself, but at leastyou've narrowed down for me.
Thanks for your reply!