how to fix error DHPFKB Rear Pump short circuit ??? check it first !!!

error DHPFKB caused Signal voltage from rear pump pressure sensor increased to 4.5 V or above.

Action of controller :
- Fixes travel speed to Lo.
- Continues controls, assuming pressure to be constant {350 kg/cm2}.
- Even if cause of failure disappears, machine does not become normal starting switch is turned to OFF position.

Problem on machine
- Rear pump pressure cannot be monitored.
-Travel and work equipment speeds are insufficient.

Related information
- As T-adapter for pump controller connector is "socket-type box", operating voltage cannot be measured at pump controller connector.
- Input voltage from rear pump pressure sensor can be checked by using monitoring function.
(Code: 01113 Rear pump pressure sensor voltage)
-Method of reproducing failure code: Turn starting switch to ON position or start engine.