Code Definition

B1994 — Driver Side, Side mount Airbag Circuit Open

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

About B1994

B1994 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 B1994 is stored, the module has detected an open (broken or disconnected) electrical path 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.

B1994 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 B1994 sets when the SRS module detects an open circuit condition on the driver side mount airbag circuit, meaning the resistance across the circuit is higher than the expected deployment squib resistance (typically 1.5 to 4.5 ohms depending on application). This is usually caused by a disconnected airbag connector, broken wires in the seat or door harness, corroded connector terminals, or a failed airbag...

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