Code Definition

B1993 — Driver Side, Side mount Airbag Circuit Short to Ground

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

About B1993

B1993 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 B1993 is stored, the module has detected a short-circuit (voltage pulled to ground or to supply) in the monitored circuit.

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.

B1993 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 Supplemental Restraint System (SRS) control module continuously monitors the integrity of all airbag deployment circuits, including the driver side mount (side impact) airbag circuit. Code B1993 sets when the SRS module detects that the driver side mount airbag circuit is shorted to ground, meaning the circuit is pulling toward chassis ground instead of holding the controlled reference potential. This fault is typically caused by chafed wiring contacting a grounded body panel, a damaged airbag squib connector, water intrusion creating a low resistance path to ground, or an internal short w...

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