isuzu jackaroo/trooper

Hello I dont know if you can help i live in australia and i am trying fix a holden jackaroo 1999(isuzu trooper?) model with a 3.0 litre diesel motor (4JX1). In the mornings after driving for about a minute the car surges and the car revs high. It will actually take off of its own accord if the clutch is out. The injectors had a recall for that model and they have been replaced. When i plug in a scan tool fault codes P0198 Engine oil temperature sensor high and P0380 glow plug/heater circuit a malfunction comes up. Would these fault codes cause that problem? If not do you have any ideas what might? If you a can help I would be happy to provide a donation.:)

Cheers
Dustin