Vauxhall Astra my astra h ecoflex 1.7 diesel 2009 has a relay (r12 ) engine control unit probleme

Tried changing the relay ?

Hi Thank you for your reply Sorry I should have mention that I have already tried an other R12 Relay and the problem remain, I most mention as well that there is a clicking in the engine which make the relay buzz but it is almost impossible to find where is come from. I have disconnected one after one each sensor in the engine to tried to eliminate the clicking but no disconnection has stop the relay to buzz!
I hope this description of my problem is clear enough
Thanks for your help

Could be the boost control solenoid buzzing and needing replaced .On some it was down the bottom front left corner

Thanks for your reply and advice
The relay buzz but the noise in the engine click and it is very hard to pinpoint and only click when taking the relay out and when puting the relay back in and only click once or twice and all this with the ignition key in and out but not switch on.