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:
1. 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).
2. 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.
3. Determine whether a digital message is being transmitted
through DME PIN 7-07 every 1 ms. If yes, proceed to Item
4. 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
2010-2020 BMW 128i Convertible (E88) L6-3.0L (N51) WWW.168MOTIVE.COM Page 86
emergency backup mode (throttled operation) US: OPEN
