BMW fault code 0031
Electronic Height Control
EHC: CAN bus
Module version: Double-axle air suspension (EHC_2N2)
In: X5 (E53) 1999–2006
Reading and clearing it
Fault code 0031 is a BMW code, stored in the car's electronic height control, not a generic OBD2 code (P0xxx): a generic OBD2 reader only reaches the engine's emissions faults, so it won't show it. AutoLingo for BMW reads it with BMW's own diagnostic protocols, in plain English, with the details the module stored about it, and clears it after a repair. If a fault comes right back after it's cleared, the problem is still there.
The electronic height control is on: 5 Series (E39), X5 (E53)
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