I have a 2010 Evo that won't start. The battery is fully charged and there's enough fuel in the tank and there's a lot of clicking from under the bonnet when I turn the ignition key but it won't turn over. There was a message on the dash that said the airbag was turned off so I went through the turn on procedure but it still won't start. Would be grateful for any ideas, thanks.

Hello,

Do you hear starter motor spinning ? Or not ?

I just hear a lot of clicking and rattling like a switch is flicking really quickly. Doesnt sound very healthy and don't like to do it for too long. I've tried it with my foot on and off the accelerator but it's the same reaction.

Okay.

Clicking come from the electrical box under the bonnet ?
If you can open it and do a small video.

I've heard a clicking sound on a Stilo that would not turn over.
It wouldn't connect to FES.

It also has numerous other errors.

In the end it was a short-circuit in the starter solenoid.
If you don't get other errors and can connect to diagnostic equipment, it might be a bad relay.
Remove the cover from the engine bay relays/fuse box... an listen to which of the relays is making that sound. Try to (gently) hit it with the handle of a screwdriver a few times. the clicking should stop..

Replace battery. No matter what a multimeter reads, this car is very very sensitive when it comes to electrical problems.