2010 BMW 128i Convertible (E88) L6-3.0L (N52K) Manufacturer Code Page 91
55 ms
Action in service
1. Use tester to request initialization of travel limits and note
whether travel limit initialization routine executes without
problems. 2. If Item 1 is not OK, replace VVT motor and
repeat Item 1
3. If replacing VVT motor fails to resolve the problem:
Open the valve cover and check the VVT for mechanical
stiction and seizure.
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
2A39 – P101A (DME)
2A39 – P101A
Information saved in
DME
Fault code
2A39 – P101A
Fault text
Valvetronic, adjustment range
Fault description
VVT-Self-Learning Function, Stops Not Learned
Condition for fault identification
Test condition:
Adjustment range monitor When travel limit initialization
routine is executed. (travel limit initialization routine is
automatically executed in a 5 hour (engine operating hours)
cycle or with ‘initialize travel limits’ tester request.
Terminal condition: Terminal 15 ON
Voltage condition:
Electrical system voltage Terminal 87 >10.0 V
Condition for fault memory entry
following renewed successful execution of the travel limit
initialization routine
Action in service
1. Use tester request to repeat the VVT travel limit
initialization routine 2. If Item No.1 is not OK, it will be
necessary to check the VVT mechanical components /VVT
servo motor
Fault effect and breakdown warning
Driver information
Warning light:
ECE: No warning message. Engine reverts to VVT
emergency backup mode (throttled operation) US: OPEN
