Coolant Temp/Level light Flashing

[Bilibong]

The coolant Temp/Level lamp occasionally starts to flash when starting the engine. The car is cold so it can't be over temp so I assumed that the level was low, it isn't.

I think this is most probably a sensor problem. If so how do I change it?

PS This is affecting our 1.4 2004 Twist Polo

[JUV]

The coolant Temp/Level lamp occasionally starts to flash when starting the engine. The car is cold so it can't be over temp so I assumed that the level was low, it isn't.

I think this is most probably a sensor problem. If so how do I change it?

PS This is affecting our 1.4 2004 Twist Polo

We've had the same problem a couple of times on our 1.2 2002 Polo - the level is fine (firmly between the min & max and even up to or exceeding the max), the engine is always cold when this happens... once or twice it's been extremely cold on frosty mornings and I wondered if it was some kind of basic "icy conditions" warning, but other times it happened in mild conditions.

Usually just stopping the engine and restarting cures it. What gives?

[kite]

Try giving the sensor prongs in the header tank a scrape with a screwdriver to clean them up.

[Bilibong]

I eventually changed the header tank. Costs about £14, no more problems.