2010 BMW 128i Convertible (E88) L6-3.0L (N52K) Manufacturer Code Page 97
Fault description
VVT-Overload Protection Temperature Too High
Condition for fault identification
Test condition:
The temperature of the VVT driver circuit in the DME is
monitored, and the system responds to overheating by
reverting to VVT emergency mode operation – the vehicle
continues to operate, but in throttled mode. Incorrect use of
the pedal-position sensor, consisting of rapid, repeated
pressure extending over several minutes heats up the VVT
driver circuit in the DME, leading to its deactivation when it
reaches a critical level.
Terminal condition: Terminal 15 ON
Voltage condition:
none
Condition for fault memory entry
after Terminal 15 switch and/or always active if DME is
awake.
VVT driver circuit in the DME: Warning threshold 112 掳C
Action in service
If no tampering/abuse can be detected the following tests
should be carried out:
1. Check for correct reluctor attachment at VVT sensor.
2. Use tester to manually activate the E-box fan for acoustic
check.
3. DME installed according to specification and check to
verify installation of spacer plate (to guide airflow in EBox).
4. Check wiring harness between VVT motor and DME for
soft shorts between the two VVT motor wires and vehicle
ground
5. Defective VVT servo motor (for instance, interturn short
circuit)
– Replace servo motor and determine whether malfunction is
still present (Clear fault memory / switch terminals on
ignition)
6. If malfunction is still present, 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
2A44
2A44 – P1062
Information saved in
DME
Fault code
2A44 – P1062
Fault text
Valvetronic, power limitation
Fault description
VVT-Limp Home Request Full Stroke Position not Reached
(Bank 1)
Condition for fault identification
