036 E232-1 - High water level in primary fuel filter/separator. Drain water, clean the bowl, and replace the primary fuel filter element & o-ring seals.
039 168-04 - Low system voltage. This diagnostic code is recorded when the system voltage is below 9.0 VDC.
039 E568-2 - Unexpected Left Motor Forward Speed Detected.
Activates: When speed on one track is faster than expected or in opposite direction than expected.
Deactivates: Must cycle keyswitch to clear the event each time the event becomes active.
Event indicates that the forward direction of the left track has moved faster or slower than expected.
As always, a Serial Number would help to provide more detailed information/diagnostics.
I assume all three of these Codes are Active.?