Medium and Heavy Trucks
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Hi my name is ***** ***** see you requested a new answer. Bare with me while I pull up those codes.
Click on this link for troubleshooting and testing the 146 EGR code.
Follow the test sequence to narrow down and isolate the cause.
Click on this link and see PDF page 113 for the boost pressure fault troubleshooting and the other. Check the wiring harness and sensors for corrosion, damaged pins or problems causing a loss of signal to the ECU. Let me know. I will be on the road for the afternoon but I will reply back on my next available login if further help is needed.