Engine management light flashing on a Punto?

I have a 2003 Fiat Punto. The engine mamagement light is on constantly until I drive at speed - when it flashes on and off. Why is this and can I stop it?

Asked on 4 September 2013 by btace

Answered by Honest John
Pour a bottle of injector cleaner into the tank then fill up with Shell V Power Nitro Plus petrol and continue to use that petrol. Might clean it up.
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