2010 BMW 128i Convertible (E88) L6-3.0L (N52K) P Code Charts
none
P1056
2A3F – P1056
Information saved in
DME
Fault code
2A3F – P1056
Fault text
Valvetronic, actuator motor: power supply
Fault description
VVT-Supply Voltage Control Motor Low Input (Bank 1)
Condition for fault identification
Test condition:
202
VVT servo motor power supply monitor
Terminal condition: Terminal 15 ON
Voltage condition:
Electrical system voltage terminal 87 >10.0 V
Condition for fault memory entry
Power supply voltage < 5.75V
Action in service
1. Check VVT power supply voltage with multimeter.
Supply voltage must lie between 5.75V and 17V.
2. If result is outside specified range: Inspect the powersupply
wire to the VVT pins and check the plug.
3. If contact is stretched or corroded: Replace plug 4. If
wiring harness is defective: Replace wiring harness.
Fault effect and breakdown warning
