I have a 2013 GU Nissan Patrol that has done only 35,000km. A few months ago the sub tank warning light illuminated and I was unable to pump from the sub tank. It is obviously outside the new car warranty. The car has not had much use. To date, I have:
1) Contacted Nissan directly. They said they might entertain a good will repair however I needed to go to the local dealership and let them liaise with Nissan. Fair enough.
2) I took the Patrol to my local dealership. They were unable to diagnose the fault but the alarm / fault was reset when they disconnected that battery anyway. They asked to keep using it and said that they probably wouldn't be able to diagnose it until it tripped again. They said keep using it and bring it back if it happens again.
3) I got about 6 weeks out it. The light came on again (and the sub tank disabled again along with it).
4) I took it back to the dealership. They looked it (probably connected it up to the diagnosis computer) and contacted Nissan. They now want me to pay $660 to have both sender units removed and examined with no guarantee it will be fixed or there won't be additional part costs.
So much for good will. I have read the historical posts on this issues and attempt to rectify the problem with the suggested earth terminal cleanup / additional strap. But just thought I would share my experience with Nissan owners / prospective owners so they can make informed decisions about their future car purchases.
If the earth terminal fails I will be enquiring re the statutory warranty claiming process.