2 tone immobiliser bleep and car won't start.

So,the key turns to position 2 and the 2 tone bleep goes off.The car won't turn over.



I call out Roadside Assistance,he plugs in the ODB and fault 0304 ( camshaft sensor related) appears on the readout.



Is it something as simple as just replacing the sensor,or could it possibly be something more complicated?

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