XFS MAF replacement ' Speed restriction'

[E31Shrew]

Hi all
Wonder if anyone can help? Using a 10 plate XFS for a few months and the dreaded 'speed restriction' has appeared. It resets after locking and unlocking the drivers door and drives OK until kick down is called for and then reverts back to 'Speed restriction'.
I know that one of the MAF sensors was replaced but have been told that they should be replaced in pairs.
Is it worth replacing the other one or is it likely to be more sinister? The OBD readout mentions MAF and Turbo!!! Yikes
Any help appreciated.
Many thanks

[fatboy b]

you might get a better response over on www.jaginfo.org

[E31Shrew]

Thanks fat boy. Replaced both MAFs today and ,touchwood, running perfectly even under load! Cheers