Chevrolet Matiz - chevron em light - SJHCHIRO

Hi all

The EM dashboard malfunction light on my wifes 27k miles car has been coming on and off since we bought it at 9k miles Despite going back to the garage many times they still don't know what the problem is. Last week they suggested it might be a cylinder head gasket(expensive job).It has never seemed to make any difference to the performance of the car but with the new approaching legislation about MOT and dashboard lights we want to sort the problem

Any ideas?

thanks

stan

PS last check cost £99!