2009 ISX600...engine light-stop engine light

[Nostalgic]

I would guess that it's losing a connection somewhere. Could be anywhere from the batteries to transmission control unit (wherever it's at?). Check fuses for light corrosion on the blades, and as for the plug connections, I've had pretty good results lightly spraying with CRC electrical cleaner and blow drying, with a light spray of Amsoil metal protector.

Something that sits a lot seems to develop more gremlins it seems.