Code Definition

B2131 — Double Lock Feedback Failure

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

About B2131

B2131 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.

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 B2131 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

B2131 is set when the body control module (BCM) does not receive valid position feedback confirming that the double lock (deadlock or superlock) function has reached the commanded state. The deadlock position feedback is usually generated by a dedicated microswitch or position contact inside the door lock actuator that closes when the actuator completes the second deadlock stroke. When the BCM commands deadlock and the feedback signal either fails to change state or returns an unexpected value, the module sets this DTC. This differs from a timeout fault in that the actuator may have moved but ...

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