2020 BMW 128i Coupe (E82) L6-3.0L (N51) Diagnostic Trouble Codes ( DTC ): P Code Charts Service instruction
none
P1078
2A3E - P1078
Information saved in
DME
Fault code
2A3E - P1078
Fault text
Valvetronic, actuator motor: overload
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
锟斤拷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 锟斤拷C VVT motor temperature).
Terminal condition: Terminal 15 ON Voltage condition:
none
Condition for fault memory entry
Warning threshold: 190 锟斤拷C VVT Servo motor temperature Deactivation threshold: 200 锟斤拷C VVT servo motor temperature
Action in service
Check VVT servo motor
Allow servo motor to cool, Clear fault memory and verify that DME software is the most recent version
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
