Code Definition

B389A — Environment Identification

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

About B389A

B389A 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.

B389A 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 Body Control Module (BCM) stores and uses environment identification data, which defines the regional, market, and vehicle configuration parameters that control which features and functions the BCM enables. DTC B389A is set when the BCM detects invalid, missing, or inconsistent environment identification information during module initialisation or normal operation. This is a configuration or data integrity fault rather than a wiring fault, and it indicates the BCM cannot correctly determine the vehicle's configured operating environment. When this code is set the vehicle may show feature f...

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