[MR2] Dash warning lights!

[Angus Harvey]

Recentley on my k-reg mr2 mk2 2ltr na....
Some dash warning lights have come on constantly. Before they came on
permanently they did intermittently flash on and off over the last
couple of weeks.

The problem lights are as follows; The oil level light, the engine
cooling failure light.the battery light-the meter is sitting just
above half! And an explanation mark, in a circle in brackets.

Strangely the engine management light is not on!
Any ideas pls anyone?
Thanx 4 your time