B0084 indicates a fault in the deployment control circuit for the second row center seat belt load limiter. This component is part of the supplemental restraint system (SRS) and is designed to limit belt force during a crash. The code typically points to an electrical or component issue rather than a collision event.
The load limiter unit itself has an internal short, open circuit, or failed deployment squib. This is the most common root cause.
Wiring to the load limiter may be chafed, pinched, or corroded, especially under the seat or along the belt path. Connector terminals can also spread or break.
A weak or intermittent ground for the SRS circuit can cause resistance faults and set this code. Ground points near the seat or body should be inspected.
In very rare cases, the SRS module itself has an internal fault that misinterprets the load limiter circuit. This is only plausible after all other causes are ruled out.
No. B0084 indicates a fault in a safety-critical system. The airbag and pretensioner may not deploy properly in a crash. The code should be diagnosed and repaired.
Almost never. The SRS module is rarely the cause of B0084. Most cases are due to a faulty load limiter, wiring, or connector. Replacing the module without proper diagnosis is wasteful and often ineffective.
The vehicle can be driven, but the SRS system may be partially disabled. In a collision, the second row center seat belt load limiter may not function, increasing injury risk. Have it repaired as soon as possible.
No. Once a load limiter (pretensioner) has deployed, it must be replaced. The code B0084 may also set if the unit is already deployed. Always replace with a new, OEM-spec part.