2A31 - P1006

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

none

2A31

2A31 - P1006

Information saved in

DME

Fault code

2A31 - P1006

Fault text

Valvetronic, eccentric shaft sensor: guide

Fault description

VVT-Guiding Sensor Parity Error (Bank 1)

Condition for fault identification

Test condition:

VVT lead sensor monitor

No faults related to the sensor's voltage supply should be present (fault code 10800)

Terminal condition: Terminal 15 ON Voltage condition:

Electrical system voltage terminal 87 >10.0 V

Condition for fault memory entry

100 ms

Action in service

If fault codes (#10801) and (#10802) are simultaneously stored in the fault memory, proceed to check the following:

Dual fault is stored when VVT sensor is not connected to the DME. Is VVT sensor connected to the wiring harness? If not: Plug in and check wiring harness between DME and VVT sensor.

Determine whether the VVT sensor wire shield is grounded at the DME (PIN 7-10) and sensor (PIN 4).

Replace VVT sensor.

If only fault code (#10801) is entered:

1. Check signal wire (VVT sensor PIN 1, PIN 3) between VVT sensor and DME for breakage or short circuits and corroded plugs. 2. Determine whether a cycle signal is visible every 1 ms at sensor Pin 1. (Ignition on!). If yes, proceed to Item 3. If no, this signal wire is defective.

Determine whether a digital message is being transmitted through DME PIN 7-07 every 1 ms. If yes, proceed to Item

If no, this signal wire is defective.

4. Replace 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