There was a knocking noice coming from the engine of my renault trafic van?

The same thing happened to me yesterday on holiday in the south of France. The People from the autoclub told me that the high pressure diesel pump stopped giving pressure and needed to be replaced But I wonder. I read somewhere on this forum that the, perhaps the crakshaft sensor could also be defective.

Who van help us mend tis problem?

Dirk
August 2010