Help for me on road - Sub Tank Error Light

Hi all,

Unofortunately, I think this is a bit of a flow on from my post 40058...

As a result of accessories fitted (I presumed), I had an extra earthing cable run by my Nissan dealer. For 2 weeks or so, running everything without the slightest suggestion of a hitch with the sub tank.

As Murphy's Law has deemed appropriate, we left for our 6 months on the road on 27th December - and on 29th - in Esperance - hey presto - sub tank light on. Rest of car is working faultlessly. Seems to have happened again per my initial post issue - something to do with interior light. We had been fishing. My wife turned interior light on, I went to start car - and there was the sub tank light.

I have tried disconnecting the battery to reset the sub tank computer, but light is still there.

Sub tank is full of fuel - and I did use the sub-tank fuel on the way down to Esperance without issue.

At probably the worst time of year, no-one is around ot help. I have tried Esperance Autos (no mechanic until Tuesday), auto electricians (no answer) and so forth to get ideas to see if there is anything else I can do.

We move on tomorrow - heading further East, so I will just use main tank until I can work out what to do. That is where EO forum comes in - is there anything else I can try to reset the sub-tank?

Also - what other options can you suggest. Can you replace main and sub with one tank? Has anyone done this is 3l GU Patrol? What is cost etc?

Any ideas appreciated - very annoying to see on the dash - with no means of getting rid of it.

Thanks

Alan