Medium and Heavy Trucks
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Hi Brian. My name is***** will be glad to help. Bare with me while I look up those codes.
8321 fmi 12 is VGT not receiving CAN messages. Check the harness and connector pins between the ECM and turbo actuator. If the harness checks okay replace the turbo actuator and calibrate using the diagnostic software.
8146 fmi 7
2368 8146 7 CAN EGR valve communication fault. Checjk the harness between the EGR valve and ECM. If okay replace the EGR valve and clean the EGR system. I the harness and components test okay try reflashing the ECM or try a test ECM if available. Let me know
Thanks for the update. Is there no throttle response at all? These faults are CAN faults and are related to ECM messages. If the harness checks good and the EGR and Actuator check good it points to an ECM hardware or software problem. I would start with a reflash of the most current software updates.
Thanks for the info. Yes it can be related. It is easiest to monitor all these parameters in Live data. Do you have access to the servicemaxx software?