I recently carried out an oil change and cleaned up my fouled plugs. Afterwards, when i started up the car the coolant buzzer began to sound. I have a correctly bled cooling system, full of fluid and i changed the coolant level sensor about 10 months ago. I disconnected the wire and tried to earth it out but the buzzer continues to sound, even with the engine off and the key in the acc position. Any ideas how i can rectify this???? Its and FD RX7 by the way.

Cheers

 

Go back and check all the connections around where you were. Chances are you knocked something loose.

Are you sure its the coolant buzzer?