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Had this come on this morning after not driving the car for over 12 hours.

Checked level and was fine, temp gauge went up to normal and stayed there..

Anything else I should be worried about. If not I'll take it back to the dealer and make them check it over and things.

Anyone any ideas next?

Thanks

Liam.

Quite a common problem. Only a new bottle will solve it.

Didn't come on this time on startup..

Is that because of the sensor in the bottle or?!

Thanks

Yep you got it.

Put a bit more water in it and see what happens. Mine started doing that after its last service when it was cold and adding some more water sorted it.

Yet same mine came on and it was just under max so mines just over max now and no longer comes on

Same with mine was slightly under. Came on needle dint move tho. Topped it up not noticed any leaks. It's fine now


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Thanks for the responses!

Ended up popping into the VW dealer I bought it from and they are putting in a new tank and sensors under warranty so might aswell! Incase adding water doesn't solve it!

Glad to know its not a massive issue though!

Thanks

Liam.

sorry to bring up a old thread. My polo has this problem coolant warning light on every start up of car. Am I right and understanding that a New coolant bottle will solve this? does the coolant bottle have the sensor already in it or will I need to buy coolant bottle and new sensor? thanks

So I changed the coolant bottle and it worked for 1 week. now every time I start up the warning light comes back on does anybody know what could be problem?

I've got the same problem on mine. Decides to flick on whenever it likes.
Whilst the car was in Shark Performance I spoke to a guy there who said theres a different sensor you can buy and it'll sort it out with no need in buying a new bottle.
Not completely sure on what switch, however he said it's green and the replacement will be black......... sorry for being useless with naming it though.

unsure if it will pass the mot with it on is all. if you ever find out the name let me know. I have a replacement bottle coming. but when mot comes. I think I will just need to stick a split pin in it as that sorts it haha