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How to Fix U012100 Error in VGSNAG3 After FCW Deactivation

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Resource icon

How to Fix U012100 Error in VGSNAG3 After FCW Deactivation

  • Thread starter Thread starter Bin
  • Start date Start date
  • Tagged users Tagged users None

Bin

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How to Fix U012100 Error in VGSNAG3 After FCW Deactivation - A step-by-step guide to correctly code the VGSNAG3 (9G-Tronic) TCU to fix the U012100 communication

This guide provides a tested solution for the Diagnostic Trouble Code (DTC) U012100 - "Lost Communication With Anti-Lock Brake System (ABS) Control Module" that can appear in the VGSNAG3 (9G-Tronic) transmission control unit.

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This error commonly occurs after deactivating the...

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