Reduced engine performance

[Lisa097]

I have a RRV8 Supercharge 2007, about a year ago I had a coolant leak and mechanics replaced coolant pump, I think? I can't remember.
Now each time I go up a hill I always get the error message Reduced Engine Performance". I've taken vehicle to RR specialists twice now and they can't find any problem. Again this weekend same message and car slows from travelling 100km to 60km on highway.
Having read about this error message, it seems maybe the problem could be Mass Air Flow sensor needs replacement or the cooling pump has been wired incorrectly?
Does anyone have any another thoughts on this, so I can talk to RR techs on what they should be checking?
Thanks
Lisa

 

[rally3]

Most likely the electric coolant pump for the intercooler circulation, it is located on the left side of the radiator and should be running when ever the key is on.

 

[Lisa097]

Thanks I'll get the mechanics to check this

 

[roverspecialist]

I wouldnt try guessing whats wrong or even what went wrong with some one elses truck i would have a qualified tech check it out.If it was that easy i wouldnt get dirty i would answer phone calls all day long and charge charge for it.