I have enough anti freeze in the car - Sometimes when the car is cold the coolant light comes on the dashbboard - Is it correct to say that the coolant sensor needs replacing??

Thanks

It is most likely the prongs in the expansion bottle getting a bit cacked up and particularly when it's cold the car thinks it's low on coolant. Try scraping them with a screwdriver to remove the muck or replace the bottle, it costs about £15 I believe.

Someone asked this yesterday and it was answered today.

http://briskoda.net/forums/topic/154157-cooling-warning-light-on-for-no-apparent-reason/

Yes, It probably is the coolant sensor, I think it's a common problem.

Just to make it clear we are not talking about the engine coolant temperature sensor. But the low coolant level sensor in the expansion bottle.