Code Definition

B2345 — Seat Switch Reference Voltage Negative Common Open Circuit

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

About B2345

B2345 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 B2345 is stored, the module has detected an open (broken or disconnected) electrical path in the monitored circuit.

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 B2345 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 B2345 code identifies an open circuit on the seat switch reference voltage negative common line, which is the shared ground return for the power seat position switches. The seat memory module or driver door module provides the 5V reference on one side of the switch pack and senses each switch closure as the return path completes through the negative common back to module ground. When the ground return is open, no switch closure can be detected by the module and this fault is set. The driver typically notices that no seat switches respond and that scan tool data shows all switch inputs stuc...

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