This is a P01 or P02 truck. The traction current sensor is located on the bus bar at ther ceramic fuses. You may have 2 of them if the truck has chopper hydraulics. If you do then you can see if both are marked as same PN# and simply swap them to see if problem follows. Sometimes the ceramic fuse (275 amp)will blow and bridge inside. Most of the time i have seen these fail is when the bus bar gets hot. Check all your bus bars for indication of being hot and make sure all bus bar fasteners are tight. Worse case scenerio is print board. You should be able to press up or down arrow after code is shown and it will give you more info such as 530 or 531...... open or short over or under voltage info.