Code Definition

B2159 — Memory #1 output Short to Ground

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

About B2159

B2159 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 B2159 is stored, the module has detected a short-circuit (voltage pulled to ground or to supply) 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 B2159 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 B2159 fault code indicates that the seat or memory control module has detected a short to ground condition on the Memory #1 output circuit. The Memory #1 output is the driver line used to illuminate the indicator LED on the memory recall switch, or to signal the recalled memory position to a related module, depending on the platform. The module monitors the output for the expected open or driven state and sets this code when the line is held at chassis ground potential, indicating a hard short downstream of the module driver. The driver will typically notice that the Memory #1 indicator st...

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