trouble code PO340 cam sensor where is it located on 2001 Mercury Sable

in the report it says replace magnets and syncronisers are these inside the cam sensors

Asked by for the 2001 Mercury Sable
1 answer
Which engine do you have? 3.0L OHV (engine code U in the VIN) or 3.0L DOHC (engine code S in the VIN)?

The synchronizer is like a distributor at the back of the engine. Has the cam sensor there too.