I'd be selling the chip and either buying a different branded chip or getting the ECU remapped. Both costly though. I ran a DP chip in my ol' Di without issues. Chips are plug and pray where as a ECU remap is permanent. So if you ever need to take your Patrol to Ni$$an, or any workshop really, they could simply see your ECU as being fubar and blame what ever issues you are seeing on that. Theres good and bad sides to both.
But maybe contact Roo systems and talk to them. Not sure how well you will go but its worth a try.