Code Definition

B3902 — Incorrect Immobiliser Identified Received

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

About B3902

B3902 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.

B3902 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), or on some models a separate Theft Deterrent Module, monitors the immobiliser identification messages exchanged between the security system components during ignition on and start authorisation. The immobiliser confirms that the key, the engine control module, and the security module all share a matching identifier before allowing the engine to start. DTC B3902 is set when the module receives an immobiliser identification that does not match the stored or expected identifier, indicating a mismatch between immobiliser components and preventing successful security ...

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