Vectra 2.4 16V fails after 3500 rpm

I have a 2.4 16V vectra and it fails after 3500 rpm, it makes me a cut. The gasoline pump is fine, it marks the key on the board scan and tells me that it is the crankshaft sensor. The only one who finds this among the cams is that? And how do I try? It does not carry it on the pulley and
or I saw anything in the box must be that.