working on a case skid steer that is in limp mode that will go forward/backward in slow mode but will not raise or lower bucket, it intermittently surges electrical and sounds like hydraulics, someone suggested i replace NOx sensor which i did which didn't fix problem. i would appreciate any suggestions to help me troubleshoot this issue. Alarm is direct readout power limit scr fail.
You're going to need diagnostic software to troubleshoot this one. Taking a stab at it I'd be leaning towards a NOx conversion issue in the catalyst.