Clio Pressure sensor

I have a 1.5 dci 100 bhp Clio ll.

I have replaced the injectors with brand new Delphi but get the following fault at 80 mph. Amber warning light on dash and car will not go beyond that speed, light goes off after a while if slow down, the fault on diagnostics is Pressure sensor (MAP)

I replaced this one with one off Fleabay, car goes to about 85/90 and seems to have more power before same problem but light goes of straight away when you lift off accelerator.

Now I know there will people who say the limit is only 70mph but this fault should not be happening at all and I have to go this fast for the fault to show.

Is it worth buying a new Bosch Map sensor or does the problem lie elsewhere?

Currently in horne65's garage:
One Laguna ll, 2004, 1.9dci, One Clio 1.5dci 2005 = 100bhp, 2014 Corsa 1.4 Turbo, 2011 Audi A1 1.6 Diesel

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Clio Pressure sensor