Hi - I'd like some advice on the potential causes of the engine management light being on all the time on my 1.8T (2001). I've had the fault code read in the past and it came up as - 'Secondary Air System - Low Flow Rate'.

Can anybody offer up suggestions? I know that the secondary air pump has been replaced in the past, so I don't think it'll be that?!?! Could it be the Lambda sensor?

Thanks

Sam