Australian Car Repair Issues? Ask an Auto Mechanic for Answers ASAP
I am a Holden Tech, so I'll help you here.
If the Rodeo is running normally, that is a good start.
It could be a common problem like oil pressure switch failure, quite easy, or it could be any one of a few other electronic issues.
I would book it with Holden, and if you can get the code from them, I'll help you further.
If it is one of the easy things, hope they won't charge too much.
How did you go with Holden?
I hope my advice has helped you.