I know it's not a Fiat but my mom drives one so I have to maitane it.
I don't know if I'm in the right place but ate least it's tech talk.

I changed the headgasket this weekend.
put everything back together with all the bolt tightend to spec.
Reconnected all the tubes and wires and fired it up.

Engine runs great! Nice and smooth.
But when I go for a spin the engine light comes on.
Engine runs fine, no strange noises.
But it go's into emergency mode.

Are there other Opel Corsa B owners here who can help me out?
I do have one connector left. I cannot find a sensor or something it must connect to.
It white, has two poles and sits around the coil area.
As teh other plugs there are all connect and the engine is running I think it never was plugged in.
But I can't remember.

Just a guess, could it be a knock sensor? Often directly under the inlet manifold and thus very easy not to see.

o Crap,

now you say that it rings a bell:bang:

I've seen on on the engine if I'm correct but I'm not sure.
I will be checking that first thing in the morning.

Thx for the tip

Well you were right.
Cable was hidden between some hoses, so error is gone!
Car runs better then ever.

Good stuff!