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why does the service light come on at 40mph?

I have a automatic Vauxhall zafira 2007 when it goes over 40mph the service light comes on and f flashes on the dashboard this lasts about 30 seconds then it goes any ideas what causes this ?

April 2017
Firstly be sure that it is the service light, usually a spanner symbol too. Despite the rather blunt response from Anon, the service could be due which would show the light. There are other reasons for this light to come on, some associated with "limp mode" where the engine loses power and some not. If this is a persistent problem I would suggest getting the fault code read by a mechanic to narrow down the reason.

Cheers now

April 2017
Yeah, it is probably telling you it needs a service,doh!

April 2017


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