My name is ***** ***** I will assist you. Different expert here.
What engine do you have?
On your paperwork from the dealer, look at it and see if they listed the specs for the valve adjustment they did. You wrote they did a valve adjusmtnet and you are having these issues. An improper valve adjustment will wipe out an injector and cause the smoke that you are having. Did they even bother to recheck the valve adjustment settings? With you having a jake brake fault on the dash, that is a concern that the adjustment is off and not done properly. I don;t want you to lose a whole engine over a improper valve adjustment. If it is improper, then just so you know, you do have legal action that you can take against the shop if they don't repair all the issues they caused and the lost downtime.
Be sure to have that adjustment checked! Reason is I seriously doubt it is a turbo isse. If it was, you would be having regen failure codes and you didn't mention that at all. The issue would be the same on a Paccar or Cummins engine in your KW.
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