The CVT belt came apart. replaced belt and one sensor. Now the trans starts out great but wont go past 3rd gear and throws a P1778. So could it be the step valve or something else?
just so you know Nissan has extended the CVT warranty to 10-year /120,000 mile
http://www.nissanassist.com/faqs.php?menu=3
The part is inside the transmission but the issue may be caused by a bad TCM or bad valve body.
there is a service bulletin for code P1777 which is very similar to P1778
https://www.autocodes.com/uploads/nissan/NTB09-148a.pdf
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