Code Definition

B2955 — Security Sensor Data Circuit

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

About B2955

B2955 is a generic (obd-ii standard) 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.

When B2955 is stored, the module has detected a sensor-related fault — the reported value from the named sensor is out of spec.

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 B2955 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 Body Control Module (BCM) monitors the security sensor data circuit to verify valid status information from the theft deterrent or immobiliser sensor. DTC B2955 is set when the BCM detects an open circuit, short to ground, short to battery, or invalid data on the security sensor data line for a calibrated period. The security sensor data line carries the coded status signal the BCM relies on to confirm a valid key or disarmed state before allowing normal operation. When this code is set the immobiliser may remain active, the vehicle may fail to start or crank without starting, and a securi...

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