Temp warning light mk5 gt sport

[rugbymad]

Merry crimbo,

My warning light for coolant is coming on, this happened a few weeks ago and i topped it up, it disappered, there is no leak as level is still the same, the outside temp is -3.5 today, could this be the problem, i need some sort of answer as i have a long long journey to do in 10 days, germany.
will the car be ok to drive? as it is?

thx in advance
 steph

[jaydubveedub]

Faulty coolant sensor would be my first thought.

Seeing as you are going on a long journey I would get it plugged into a diagnostic computer and get the codes read, this should tell you what needs replacing.

[Schuey]

Merry crimbo,

My warning light for coolant is coming on, this happened a few weeks ago and i topped it up, it disappered, there is no leak as level is still the same, the outside temp is -3.5 today, could this be the problem, i need some sort of answer as i have a long long journey to do in 10 days, germany.
will the car be ok to drive? as it is?

thx in advance
 steph

I had the same problem on a 170 TDI A3, on starting it would sometimes give a coolant warning, then after a mile or so it would go, but as you have said levels etc.... were all fine.  New sensor is what I fitted but that was after 3 months & it caused no problems in that time.