Originally Posted by
GMPX
I would suggest the box tuners that will give trouble are those that have modified the Cummins ECM operating system to give on the fly switching features. The problem boils down to the extra code they have written to the ECM to make the extra functions work cannot be read out, so what EFILive can read is basically an incomplete file to make the ECM run. The $0311 error is the ECM sending a response back to EFILive at the end of the flash to say the reflash did not complete as expected, it knows there is data missing (the stuff we can't read).
Thankfully it doesn't mean a dead truck and using a standard Cummins tune to get up and running again is the answer.
Blame should not be put on these box tuners, it's just a restriction of the Cummins ECM architecture, what is annoying is when a user tells the box tuner to return the ECM back to stock and it does not.