Code Definition

B1233 — Glass Break Sensor Failure

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

About B1233

B1233 is a manufacturer-specific body diagnostic trouble code. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B1233 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.

B1233 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 glass break sensor is part of the vehicle's perimeter security and anti theft alarm system. It is typically a piezoelectric or microphone based sensor that listens for the characteristic high frequency acoustic signature of breaking glass when the alarm is armed. DTC B1233 is set when the security or body control module detects an electrical fault with the sensor or its wiring, such as an open circuit, a short to ground, a short to voltage, or an internal sensor failure that prevents it from responding to a self test signal. With this code present, the glass break detection function is dis...

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