2010 BMW 128i Convertible (E88) L6-3.0L (N52K) P Code Charts
none
P1057
2A3C – P1057
Information saved in
DME
Fault code
2A3C – P1057
Fault text
Valvetronic relay, activation
Fault description
VVT-Supply Voltage Control Motor Electrical (Bank 1)
Condition for fault identification
Test condition:
The voltage at the capacitors is monitored. If this is below
an offset of the battery voltage an fault symptom is
registered
Terminal condition: Main relay ON
Voltage condition:
none
Condition for fault memory entry
0.05
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:
Emergency default mode 2
