Monday, November 14, 2022

2A31 - P1006

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



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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

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