2015 Nissan Murano Spark Plug Replacement Plus MIL on And CVT Judder

The customer requested I replace the rear three spark plugs under the intake plenum as he replaced the front three. I believe he was thinking there was a misfire going on when actually it has a code in the CVT for a Judder condition, P17F1. There is an extensive bulletin in this condition caused by a worn drive chain. There is also a P0456 Small Evap Leak code in the ECM.