coolant light flashing

[john pue]

hi my coolant warning light flashes and the beep sounds, but its only on cold mornings. the coolant level is ok. any ideas?? cheers
and no faults on 5051

 

[beezasport]

coolant temp sensor?

 

[Banana Man]

hi my coolant warning light flashes and the beep sounds, but its only on cold mornings. the coolant level is ok. any ideas?? cheers
and no faults on 5051

very common this and if you search will find stuff but basically if you ask a dealer they say entire expansion tank needs replacing but we say clean the metal prongs in the tank that may have corroded.