Code Definition

B191A (39) — Front Seat Heating Module Internal Malfunction

System: Body  |  Type: Manufacturer-Specific  |  Make: Holden

About B191A

B191A is a manufacturer-specific body diagnostic trouble code recorded for Holden vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

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.

B191A is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The Front Seat Heating Module is a dedicated electronic controller that drives the heating element pads in the seat cushion and seatback, and monitors current draw and temperature sensor feedback to regulate seat temperature to the level selected by the user. The module runs continuous self diagnostic routines on its internal processor, memory, voltage regulator, and output driver stages whenever the seat heating system is requested. DTC B191A with subcode 39 is set when one or more of these self diagnostic routines returns a result outside the valid range, indicating an internal fault inside ...

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

Quick Facts