2A30 - P1020

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

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2A30 - P1020 (DME)

2A30 - P1020

Information saved in

DME

Fault code

2A30 - P1020

Fault text

Valvetronic, eccentric shaft sensor: power supply

Fault description

VVT-Supply Voltage Sensors Low Input (Bank 1)

Condition for fault identification

Test condition:

Monitoring of voltage supply to excentric shaft Nominal value for voltage supply sensor = 5.0V Terminal condition: Terminal 15 ON

Voltage condition:

Electrical system voltage terminal 87 >10.0 V

Condition for fault memory entry

Sensor power-supply voltage < 4.75V

Action in service

Check sensor power supply voltage with multimeter. Supply voltage must lie between 4.75V and 5.25V.

If result is outside specified range: Check power-supply wire to VVT sensor and check plug.

If contact is stretched or corroded: Replace plug on VVT sensor

If wiring harness is defective: Replace wiring harness between DME and VVT sensor.

Fault effect and breakdown warning

Driver information

Warning light:

ECE: No warning message. Engine reverts to VVT emergency backup mode (throttled operation) US: OPEN