Engine warning light

Hi, I have a 96 vindicator 200 @ idle or low speeds the engine light comes on and buzzer sounds for about 10 seconds then stops. @ wot the engine light goes out
and everything is fine. The water pressure is around 8 psi @idle and 30 plus at wot.
Any help would be appreciated.

MIne did that at WOT and it was a fuel restriction. I cleaned the fuel filter out (it was full of trash) and it went away.

You are referring to the check engine light, right?