Is that something a certified nissan mechanic will know to check?? I just dont know much about nissans and imports in general to know what does what etc.
Honestly, maybe... it really depends on the mechanic. Some are worlds better than others. Once you find a good one, take it only to him.
The tech at Nissan will have available to him the CONSULT computer which plugs into your ODBI port and reads various parameters. It will tell him alot of valuable info.