Originally Posted by
cindy@efilive
It's recently come to light that early 6.7L vehicles have a different timing response requirement to later 6.7L vehicles.
We've recently made and tested change to our software to extend the time required for the controller to respond to our messages. This will most likely be the cause of your $0548 issue, and has been resolved for our next software release (scheduled for 1-2 weeks)
Your $0311 issue is the result of your handheld programmer locking the ECM to prevent the file from being read out. You will not be able to use that file as your base file.
Cheers
Cindy