2A43 - P107C

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

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2A43 - P107C (DME)

2A43 - P107C

Information saved in

DME

Fault code

2A43 - P107C

Fault text

Valvetronic, thermal overload protection: warning threshold

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 锟斤拷C

Action in service

If no tampering/abuse can be detected the following tests should be carried out:

Check for correct reluctor attachment at VVT sensor.

Use tester to manually activate the E-box fan for acoustic check.

DME installed according to specification and check to verify installation of spacer plate (to guide airflow in E- Box).

Check wiring harness between VVT motor and DME for soft shorts between the two VVT motor wires and vehicle ground

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)

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