2008 nissan altima push start

I installed a Avital 5103 in a 2008 Altima with push button start last week. I used the Fortin can-sl2 and Fortins website guides for wiring.  I followed everything on their site seeing as how they ev en give you pictures lol and upon completetion the car seemed to work fine.  The next day the customer calls and says the SES light is on, the car is hesitating and the key light is staying on now.  I followed Fortins update sheets and cut the key light wire like they said. Not sure where to go from here.  Any help would be appreciated.

since the ses light is on, pull the codes to see why it is onThis information is provided only as a reference.

All circuits should be verified with a digital multi-meter prior to making any connections.

I got the car in the bay today, pulled the dash apart and went thru every wire after I reset the car.  Found 2 bad diodes on the negative starter and negative ignition.  Replaced them and it works mint now.  Im a HUGE Directed fan but the Fortin stuff and tech docs are awesome.