That is what they did, they upgraded the Controller, but the tech that did it when I questioned him about the issues he said he hadn't upgraded anything. Then when asking about capacitance readings of were do you see that read out he couldn"t explain the readout on the dashboard about the bargraph on the far right showing that reading, After a week of driving the same route, same speeds it appears to be getting better, but I asked to have the upgrade redone by someone else cause I've got no confidence in the one so called Master Tech, they kept my car two days for the 15k service, at the Duluth Dealer that did the upgrade. My redo was refused. So I have informed them not doing business with them and will use the dealership in Gainsville closer to my home anyway. I ve demaded Nissan Customer have their roving Master Tech meet me at the Gainesville Nissian and reload the upgrade, They'll get back to me.