My corsa struggles to idle after starting from cold. You have to increase the revs when it's idling. When warmed up (in a mile or two) its fine.

If I increase the throttle speed it solves this but obviously it idles faster when warned up!

I checked the ICV inside and cleaned the motor contacts, but the prob is still there.

I've been told there is a temp sensor that controls the idling from cold too.

Could this be at fault? Where do I find it and can I test it somehow ?

THank you