The video focuses on the basic Volkswagen 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:
Volkswagen
Code:
P20BB
Definition:
Cellular Phone Select Service Switch Malfunction (3 button assembly)
Cause:
The VCIM powers the button assembly through the keypad supply voltage circuit for 11.5 milliseconds, turns the power OFF, then waits for 50 milliseconds and sees a voltage value greater than 1.8 volts on this circuit.The above conditions are present for greater than 300 milliseconds.

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