DTC Buick P1672 Short Explanation

The video focuses on the basic Buick 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:
Buick
Code:
P1672
Definition:
No Communication With HVAC Control Module
Cause:
HVAC Class 2 circuit is open, shorted to ground or to B+HVAC ignition power circuit has a high resistance conditionHVAC main ground circuit(s) has a high resistance conditionHVAC (module) may have failed and is pulling the circuit low