BMW fault code 9551
A-pillar satellite
SASL: Control-module fault (short circuit or open circuit H/L-side switch ZK2)
Module version: A-pillar satellite (SASL)
In: 7 Series (E65) 2001–2008, 7 Series (E66) 2002–2008, 7 Series (E67) 2002–2008
Reading and clearing it
Fault code 9551 is a BMW code, stored in the car's a-pillar satellite, 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 a-pillar satellite is on: 7 Series (E65), 7 Series (E66), 7 Series (E67)
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