This is a problem I've had twice now. First the speedo died, the the check engine light came on. On the first occasion I pulled over, lifted the bonnet and looked (while the engine was ticking over). As I pulled away the speedo started to work again.
Last night, same symptoms so I pulled over and switched off. Restarted and it was still not working, so I pulled over, and lifted the bonnet while the engine ticked over. As I pulled away - it was still not working. Then a mile later it burst into life.
Anyone have any idea what's going on please?
The car is an STi IV, and was recently given its 15,000 service.

BTW, this topic faied on the general board, so I'm trying here!

 

I replied on the general board!