When starting engine, after 10-15 seconds the oil light flashes and audio beep three times.

 

The rev counter is also not working.

 

Checked oil level and it is fine, any idea?

 

low oil preasure??? - possible pick up pipe blockage - loads of feeds about that

Check fuse 15 (5A); supplies instrument panel.

 

Other than that, I think we're heading into reading fault codes.

+1 for Oil pick up strainer sludged up.