I have these codes too, and now need your marriage guidance before the divorce papers are produced..
You might have seen my other posts in:
http://www.alfaowner.com/Forum/alfa-...speed-ecu.html (Battery Voltage + P07025 error on Selespeed ECU)
http://www.alfaowner.com/Forum/alfa-...selespeed.html (Flashing 5th gear on Selespeed)
http://www.alfaowner.com/Forum/alfa-...selespeed.html (Clunky selespeed?)
Basically, the car has decided to throw a wobbly sometimes and is very slow to downshift the gears. Sometimes the revs will drop so low that the car stalls, steering locks up and I get Selespeed System Failure.
I have been round the earth and back again to try and get to the bottom of it so I would rellay appreciate your help at this final hurdle (I hope). I'd definately agree with iainfm that this is a communication issue between the selespeed ecu and engine ecu.
I previously only got error P0725 on the selespeed ecu as a clue to what was going on. The last time it really played up and I had to re-calibrate the gearbox etc. before I could move again.
By the way, the clutch rod is set to 28mm and I have cleaned the 20-pin connector.
But now, the same code (P0725) has reappeared along with a new one: P1762 Can Message Transmission (signal not plausable).
I haven't checked is the connections to the selespeed ecu behind the glovebox and this is the next thing I think I should try. Is this simple enough to get access to and easy enough to do on a cold windy night like tonight?
Thanks all, really appreciate you taking the time to read/reply..