16502 - Engine Coolant Temp. Sensor (G62): Signal too High

hi guys, just did a VCDS scan on my 2003 S3 after my engine management light has been on and as title says i have the following code;

16502 - Engine Coolant Temp. Sensor (G62): Signal too High

I vaguely remember reading something about a revised coolant sensor which is intergrated as part of the coolant tank???

could anyone else shed some light on this please?

just did a quick search but couldnt find anything, cheers

Thanks Dave, do you have a part number? Also where is it located?