Code Definition

B2443 — Powertrain Performance Mode Switch Circuit failure

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

About B2443

B2443 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 B2443 is stored, the module has detected a plausibility fault — the measured value is in the electrical range but is not consistent with expected operating behaviour.

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 B2443 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 B2443 code indicates a circuit failure on the Powertrain Performance Mode Switch input to the Body Control Module (BCM). The performance mode switch is the driver selectable input (often labelled Sport, Normal, ECO, Snow, Tow Haul, or similar) that requests a powertrain calibration change from the engine, transmission, and stability control modules. The BCM reads the switch state, typically as a hardwired multiplexed resistive input or as a discrete digital input, and broadcasts the selected mode over the vehicle network for the PCM and TCM to act on. This code sets when the BCM detects th...

Join TaT to view the complete code information and diagnostic details.

Quick Facts