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BMW U2100 Code – MOST Bus Communication Lost
No
Safe to drive :
BMW vehicles only
Applies only to :
Not applicable to :
This explanation does NOT apply to other brands.
High
Severity level :
When Does This Code Appear on the Vehicles
BMW U2100 occurs when modules lose communication on MOST bus.
What This Code means on the Vehicles
BMW-specific loss of module communication over network bus.
Why This is different from a generic OBD2 Code
Generic OBD-II scanners cannot detect MOST bus-specific U codes.
Common Situations That Trigger This Code
Module failure; Wiring issue; Aftermarket device interference.
What Will NOT Fix This Code
Clearing codes without fixing bus issue.
How to Clear This Code on Vehicles
Inspect wiring, modules; use BMW ISTA to clear U2100.
Related Manufacturer Specific Codes
BMW U2101; BMW U2102
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