SES light came on so I went to AutoZone, hooked up
machine to tell you the code, P0101, which is replace
Mass Air Flow Sensor, replaced that had air filter cleaned
because I have a K&N filter. SES Light won't go off, Even
reset the battery.
I have had problems with K&N air filters. They tend to get over-oiled and the oil winds up on the MAF sensor, causing it to malfunction. 1) Try a stock paper-element air filter. 2) Thouroughly clean MAF element. 3) manually reset the SES light. Good luck!
there is an ecm reprogram that nissan just put out about a year ago for this issue