The NATs light has no affect to the eps system. The NAT light is driven independently from the eps. The eps is very simple in theory. It only needs battery, ignition and CANbus.
IF THE BCM module detects a bad security code then the NATs light is illuminated.
There was a issue during EPS manufacturing where the EPS create the CANbus to be corrupted and the CANbus created bad messages,
Until you give further data, like a CANbus extract or do some further diagnostics it’s hard to find the fault. If I had the car I could plug in and tell you exactly what’s wrong with the eps. But there’s many faults here!
Jason
