2010 BMW 128i Convertible (E88) L6-3.0L (N52K) P Code Charts
none
P1078
2A3E – P1078
Information saved in
DME
Fault code
2A3E – P1078
Fault text
Valvetronic, actuator motor: overload
206
Fault description
VVT-Overload Protection Control Motor Current High
Input (Bank 1)
Condition for fault identification
Test condition:
Monitoring of servo motor overload;
The VVT servo motor temperature is calculated in the DME
using a model. The first stage occurs when it heats beyond a
warning threshold (fault #10819, fault class 2). This is 190
掳C (VVT motor temperature) and causes the VVT to revert
to operation in its emergency mode. If the VVT motor were
to overheat even further, the VVT system would be
completely deactivated upon reaching the deactivation
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
