Code Definition

B2343 — Seat Switch Reference Voltage Positive Common Supply Low Voltage

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

About B2343

B2343 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 B2343 is stored, the module has detected a signal or supply voltage lower than the expected operating range.

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 B2343 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 B2343 code indicates that the seat switch reference voltage on the positive common circuit has dropped below the lower voltage threshold expected by the monitoring module. The seat memory module or driver door module supplies a regulated 5V reference shared across all the position switches inside the power seat switch pack and continuously monitors that supply for nominal voltage. When the supply is pulled down, typically by a short to ground or excessive parasitic load on the reference rail, every seat switch input becomes unreliable and the module sets this fault. The driver usually noti...

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