what engine are we working and how old is the car.
have you had a fault reading done on this car (any garage can do this)
this will point a direction of the system causing the problem.
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The vehicle is a vauxhall vivaro 2700 DI SWB van, it was registered in March 2002 & has 55,000 miles on the clock.
No I haven't had a fault reading done as I only acquired the vehicle 2 weeks ago & the 'management light' has only appeared tonight.
Can you give me any idea at all what the problem might be as the hand-book is absolutely useless !!
without a fault reading I can only have a guess and would say there could be a problem with the egr valve but this can only be checked by going to a Garage and getting the faults read.
when this would be the fault don't let them replace the valve first clean it and refit the valve and see if the fault is gone.
most of the time the carbon in the valve is the problem not the valve it self .
Kind regards Peter