Code Definition

B2320 — Mirror Driver Horizontal Feedback Potentiometer Circuit Failure

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

About B2320

B2320 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 B2320 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 B2320 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 Driver Door Module or Body Control Module monitors the horizontal position feedback potentiometer inside the driver side power mirror to track the mirror's left to right position for the memory mirror function. DTC B2320 is a general circuit failure code set when the module sees the horizontal feedback signal outside its expected operating range, fails to detect a valid change in signal during mirror movement, or detects an internal sensor fault that does not specifically indicate open, short to ground, or short to battery. The horizontal potentiometer is fed a reference voltage and return...

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