DTC GMC P0278 Short Explanation
Channel: Maxidot GMC
Date: 20/06/2020

The video focuses on the basic GMC specific diagnostic error code.
Contents:
0:21 Basic DTC analysis according to OBD2 protocol standard.
1:48 Insight into programming
- an explanation of what a bit is and how a byte is formed
- decoding the Error Code to the base programming
2:58 A diagnostically understandable description of the Diagnostic Trouble Code
3:05 Basic error definition
- Possible causes or errors of the car and its parts describing the mentioned error

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Make:
GMC
Code:
P0278
Definition:
Gauge Control Module Lost Communication With ACC Unit (ACC message)
Description:
Poor communication between the Gauge Control Module and ACC Unit.NOTE: If you are troubleshooting multiple DTCs,be sure to follow the instructions in B-CAN System Diagnosis Test Mode A.If the HDS does not communicate with the ACC unit,the ACC indicator stay on,and no ACC DTCs are stored,go to symptom troubleshooting for ACC indicator does not go off,and no DTCs are stored.
Cause:
 "Open" circuit between gauge control module connector A and ACC unitFaulty ACC unit Faulty gauge control module