Code Definition

B2312 — Mirror Passenger Horizontal Feedback Potentiometer Circuit Failure

System: Body  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About B2312

B2312 is a generic (obd-ii standard) body diagnostic trouble code. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B2312 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

Because B2312 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The Passenger Door Module or Body Control Module monitors the powered passenger side exterior mirror horizontal (left/right) position through a feedback potentiometer integrated with the horizontal mirror motor. DTC B2312 sets when the module detects that the horizontal potentiometer signal is open, shorted to ground, shorted to voltage, or stuck outside the normal operating range expected during mirror motor commands. The potentiometer provides a continuous voltage signal proportional to mirror horizontal angle, allowing the module to position the glass at memory recall settings and to perfor...

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