2A77 - P105B (DME)

2A77 - P105B

Information saved in
DME

Fault code
2A77 - P105B

Fault text
Control module, internal fault: Valvetronic output stage

Fault description
Internal Control Module VVT Error, VoltageToo Low

Condition for fault identification
Test condition:
Undervoltage in power supply to driver circuit has been
detected (ATIC61 diagnosis)
Terminal condition: Terminal 15 ON
Voltage condition:
Battery voltage > 9.953125V and battery voltage <
25.898438V

Condition for fault memory entry
0.2

Action in service
1. Ignition off, let control module return to dormant state as
indicated, restart
2. If Item 1 is not OK, it will be necessary to check the
electronics in the control module

Fault effect and breakdown warning


Driver information
Warning light:
Fault entry in info memory only

Service instruction
none