Can faulty motor mounts cause a knock sensor code on bank 1 &2.

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Replaced knock sensors and harness along with intake gaskets and valve covers. Check engine light still lit. OD works fine. Mechanic said bad motor mounts can simulate engine vibrations? Thus sending a false engine knock signal to the sensors. I need 3 motor mounts and probably need an oil change and fuel system cleaner done. Just bought it 1995 Es300 149k.