you most likely will get more and better answers/opinions if you start your own thread, rather than "hijack' a thread, especially since this thread is about electric Yales, and you have a diesel powered sitdown. now to your question,,,
Is this " pilot operated hyd lever" a finger tip control? if so you may have to adjust the center position of the lever. or replace the lever assembly.

Please help I have a Yale fork lift gdp35. Model 2007 has a fault code of hyd interlock , it has a pilot operated hyd lever

check the battery
make sure it is filled and fully charged and has no problems in any of the cells

Co worker found one of the microswitches at the valve body was shorted, replaced and no longer displaying a 208 fault. Now it displays a 207 fault "Lift Interrupt".

Any help is appreciated.