2A39 - P1023

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

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2A39 - P1023 (DME)

2A39 - P1023

Information saved in

DME

Fault code

2A39 - P1023

Fault text

Valvetronic, adjustment range

Fault description

VVT-Self-Learning Function Faulty Adjustment Range (Bank 1)

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