2010 BMW 128i Convertible (E88) L6-3.0L (N52K) Manufacturer Code Page 69
threshold (200 掳C VVT motor temperature).
Terminal condition: Terminal 15 ON
Voltage condition:
none
Condition for fault memory entry
Warning threshold: 190 掳C VVT Servo motor temperature
Deactivation threshold: 200 掳C VVT servo motor
temperature
Action in service
1. Check VVT servo motor
2. Allow servo motor to cool, Clear fault memory and verify
that DME software is the most recent version
3. DO NOT replace DME!
Fault effect and breakdown warning
Driver information
Warning light:
ECE: No warning message. Engine reverts to VVT
emergency backup mode (throttled operation) US: OPEN
Service instruction
none
2A3F – P1055 (DME)
2A3F – P1055
Information saved in
DME
Fault code
2A3F – P1055
Fault text
Valvetronic, actuator motor: power supply
Fault description
VVT-Supply Voltage Control Motor High Input (Bank 1)
Condition for fault identification
Test condition:
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 > 17 V
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
