with that many codes i would be looking at the harness, for a break or bad ground wire

Hi, my forklift is showing the following error codes:

E0146
01690

Can't find these error codes anywhere online. Do you know what's the problem?

Thank you Fishmech, that took care of the problem.

First you need to calibrate hydraulic handle. Turn key on, do not start truck. Do not know the age of the truck so I am assuming you have a joystick. Push joystick forward and hold for three seconds, let go to center for three seconds and pull back and hold for three seconds. Do the same for the tilt. For any other truck I will need serial number. The last code you list is an External PVE Fault. Below are the specifics. Could be failed connections or wire or valve. Looking at the hydraulic valve, you should see one with a red light. Good Luck
Input signal monitoring (flashing red LED on valve) Transducer supervision (constant red LED on valve) Supervision of the closed loop (constant red LED on valve).