New Holland T8010 Manual page 1517

PTO Off Switch Data Is Set To The Error State
Cause:
The Data Bus signaled that PTO switch data is set to error state.
The AUX/Hitch/PTO controller received the signal from the armrest controller.
Possible failure modes:
1. Bad PTO switch.
2. Software execution error in the armrest controller (small chance).
Solution:
1. Erase fault code. Continue PTO function and continue operation. Continue with next step if needed.
2. Connect the service tool to the tractor Data Bus, do the following:
Go to the Monitor screen by click the Monitor Icon.
Click the CHANGE PARAMETER SELECTIONS Icon.
Click the PTO SWITCH and then ADD. Next click EXIT. You will now be able to monitor the AUTO PTO
SWITCH status on the screen.
3. If service tool is not available check PTO switch for proper function. Remove armrest and test switch.
Section 55 - Electrical System, Controller - Chapter 3
AUX/HITCH/PTO FAULT CODE 168
55-3-98