Vauxhall Zafria 2.0dti breeze '05 plate cutting out?

My Zafria DTI 2.0 Breeze '05' plate has started playing up while driving by cutting out, it started last Sunday, after an hour I started it & it ran ok all week up untill yesterday when the same problem happened, I have had it scanned & it flagged up with the camshaft & crankshaft sensor fault.

A major Vauxhall dealer have informed me that this model doe's not have a camshaft sensor can someone please advise.