1990 Torslanda warning light

200F Engine
I recently renewed the water pump after its housing fractured (subsequently found bearing disintigrated) and sent the fan off its belt and left it hanging off perilously close to the radiator. Not unreasonably the water pump terminally gave up. Due to one way system and double yellow lines I had to drive for approx 400 metres before being able to park safely and eventually tow the car home. I lost all of the water I think in one great gush.
As I say I have now renewed the water pump and as far as I can tell no head gasket damage nor radiator damage after the fan "fell" into the rad
When it happened I had lots of flashing lights on the instrument warning horizontal strip but it made it to the spot where I parked. Temp gauge was maximum.
Now all is together the Coolant temp sensor light remains on after engine starts and runs. (2nd. telltale instrument warning light from the left). Temperature gauge is working properly ( no overheating )
engine starts first time and runs sweetly.
I understand this warning light reads from the fuel inj. system and I assume that if the sensor was malfunctioning it would throw up difficulty in starting and running. But as I say I have none of these.
I ran the self diagnostic under the bonnet and it returned 224 -coolant temp sensor fault . I then cleared the codes and re tested - it then returned 111 - no faults - but the warning light remains on.
Can anyone throw any light ( pardon the pun) on this and advise if and how, I can correctly extinguish this warning light
Many thanks

[Clifford Pope]

I have been reliably told that the ultimate way to extinguish all codes is to disconnect the battery and then reconnect. (Make sure you know the radio code first)
It didn't work when I tried it, but it might be worth a go.
Otherwise it does look as if the temperature sensor might be faulty. They always say that a frequent cause of odd codes coming up and any intermittant trouble is poor contacts and earths, but I never know just how far, and where, to begin the search. Cleaning the connector to the sensor itself would be a good start.