Code Definition

B2442 — Intrusion Sensor Fault

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

About B2442

B2442 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 B2442 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 B2442 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 B2442 code indicates a fault has been detected with the intrusion sensor circuit used by the vehicle security or anti theft system. Intrusion sensors are typically ultrasonic or volumetric transducers mounted in the headliner or overhead console that detect movement inside the cabin while the alarm is armed. The Body Control Module (BCM) or dedicated security module monitors the sensor for proper power, ground, communication, and self test response, setting this code when the expected feedback is outside normal parameters. When this code is set, the interior motion detection function of th...

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