Hard to say without knowing the engine serial number and because this is coming up as an MID 128 code, it is probably being displayed by the EVC system. So need to know what EVC system it's using.
The EVC generated display won't show all codes, so it's always best to connect a scan tool to the engine.
Best guess is it's a problem with the throlle position sensors 1 and 2 having simultaneous voltages out-of-range. This is about the only code that will cause engine shutdown.
Might be time to have a trained dealer tech look at it?