BMW fault code 01077C

Hybrid master control module

HCP: Output-speed sensor, transmission, open circuit or short circuit to ground

Module version: Hybrid master control module (HCP_72)

In: X6 (E72) 2009–2011

Reading and clearing it

Fault code 01077C is a BMW code, stored in the car's hybrid master control module, 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 hybrid master control module is on: X6 (E72)

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