2A3E - P1078

2020 BMW 128i Coupe (E82) L6-3.0L (N51) Diagnostic Trouble Codes ( DTC ): Service instruction

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2A3E

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