2A3F - P1056

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

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2A3F - P1056 (DME)

2A3F - P1056

Information saved in

DME

Fault code

2A3F - P1056

Fault text

Valvetronic, actuator motor: power supply

Fault description

VVT-Supply Voltage Control Motor Low Input (Bank 1)

Condition for fault identification

Test condition:

VVT servo motor power supply monitor Terminal condition: Terminal 15 ON Voltage condition:

Electrical system voltage terminal 87 >10.0 V

Condition for fault memory entry

Power supply voltage < 5.75V

Action in service

Check VVT power supply voltage with multimeter. Supply voltage must lie between 5.75V and 17V.

If result is outside specified range: Inspect the power- supply wire to the VVT pins and check the plug.

If contact is stretched or corroded: Replace plug 4. If wiring harness is defective: Replace wiring harness.

Fault effect and breakdown warning

Driver information Warning light: MIL ON