Code Definition

B1129 — RH Side Air Bag Module Circuit Malfunction

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

About B1129

B1129 is a manufacturer-specific body diagnostic trouble code recorded for Nissan vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B1129 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

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.

B1129 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 right hand (RH) side airbag module deployment circuit for correct resistance and electrical integrity to ensure the side airbag can fire correctly during a side impact event. On most Nissan vehicles the RH side airbag is mounted in the passenger seat outer bolster, with the squib wiring routed under the seat through a dedicated yellow connector. DTC B1129 is set when the SRS module detects a circuit fault such as an open circuit, short to ground, short to battery, or resistance outside the expected range (typicall...

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