This code indicates a malfunction in the deployment control circuit for the second row right seat belt load limiter or pretensioner. It means the Supplemental Restraint System (SRS) module has detected an issue that could prevent the seat belt from functioning correctly during a crash.
The internal squib or pyrotechnic charge within the seat belt assembly has failed or is out of specification.
An open or short circuit in the wiring harness between the SRS module and the seat belt, often caused by chafing or damage under the seat.
Corrosion, bent pins, or a loose connector at the seat belt pretensioner can disrupt the deployment signal.
If the vehicle was in a prior crash and the pretensioner deployed but was not replaced, this code will remain stored.
The SRS module itself fails to read the circuit resistance correctly, though this is extremely rare.
It is not recommended. The second row right seat belt load limiter or pretensioner may not deploy in a crash, increasing the risk of injury to that passenger.
The primary airbag system may still function, but the specific seat belt pretensioner for that seating position will likely be disabled by the SRS module as a safety precaution.
Yes, a disconnected, loose, or corroded connector under the seat is a very common cause of deployment control codes like B0085.
No, replacing the SRS control module is almost never the correct fix for this code. Drivers are sometimes told to replace the control module, but that is usually wrong; the actual problem is almost always a faulty seat belt pretensioner or damaged wiring.