I have a 2004 156 2.4 JTD and I'm very happy with it apart from the above fault!
Welcome to Alfa ownership was that?
Alfa specialist Diagnostics identified over boost as the reason for it's frequent forayinto safe mode, so the inlet manifold sensor was cleaned of the soot build up and reset. I collected the ar and got it the alarm again on the way home, shortly to be followed by safe mode!
I have now replaced the manifold sensor, but the fault still remains. Admittedly it's more reluctant, but given enough beanz and she fails again.
My question gentleman, is that I have changed the sensor and because the interface I've ordered has not arrived yet to work with FiatECUscan, it's not had a reset since the change. Is it still failing on the original fault because it's not been cleared?
I had assumed it would clear after a couple of days on its own? I've not disconnected the battery because I don't have the reset code.
Many thanks in anticipation.