BMW fault code 0033
Electronic Height Control
In the electronic height control, code 0033 means different things depending on the version of the module in the car. Find your car below; the app shows the right one for yours.
KBUS
Module version: Electronic Height Control (EHC_2N)
In: 5 Series (E39) 1995–1998, X5 (E53) 1999–2006
EHC: K bus
Module version: Double-axle air suspension (EHC_2N2)
In: X5 (E53) 1999–2006
Reading and clearing it
Fault code 0033 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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