facelift model? my display keeps telling me that its below freezing outside even when the sun is shining and people are wearing t shirts.
and the warning flashing is doing my head in.
i cant find the sensor to check it

the outside air temp sensor is located in the lower grille on the front bumper (the grille below the vauxhall badge) as you look at it from outside you'll see a round circle in that grille about the size of a five pence piece hopefully the sensor is still in that hole if not you should be able to see a loose wire with the sensor attatched to it.
if its showing stupid degrees celcius you'll need a new sensor anyway.The part number you need is 9152245 and its about £9 plus the VAT. If you go to your local dealer they will be able to get one for you, and you can fit it yourself or get them to fit it (it doesn't take very long so won't cost too much!) Its worth sorting as the part is very cheap.
Hope this helps, anymore probs please email me!

hi mate i think that they are under the left side wing mirror i quote think mine is and i have the 2003 vectra

On a Volvo it's tucked in below the front bumper, if that helps!?

I own a shop, and I can tell you they hide these pretty well. You can rule out it being under the hood because of the heat that's under there. It would make sense for it to be in the grill, outside part of the fenders, or where it can get nothing but outside air. There is an air intake sensor in the hose that goes to the snorkel to tell the computer what the temperature of the air entering the engine is, but I don't think this is what you are talking about. Your best bet for finding this sensor would be; call a dealer, talk to the service department manager, and he can tell you, or find out. This way you won't be guessing. If the sensor is getting a very low temperature reading; suspect it is in the wind and reading the wind chill. Is there a cover that is missing off it? This would explain the low reading.
Glad to help out, Good Luck!!!

You can go to the parts store and have them look it up. Air temp sensor should be in your air intake duct work under the hood next to your hood latch. Your outside air temp sensor is located on the driver's side lower fender.
**musiclicker** If you own a shop go to work. How can you tell someone to call the dealer? They won't help they'll just tell you to bring it in. If you own a shop then look up the answer.