B0085 code meaning
Second Row Right Seat Belt Load Limiter Deployment Control
What B0085 means
B0085 points to the igniter circuit that would change the force level of the right rear belt. No maker documents it with that meaning. Joyson offers dual-stage limiters with degressive or adaptive behaviour, and an Autoliv patent switches from the stiff to the soft torsion section when the controller fires a squib once cabin deceleration crosses a threshold; in a rear seat such a loop would be watched like any other squib. IIHS rear-seat work found the right rear position tested less often than the left (16 against 27 runs). In practice, B0085 on a GM Global A car (Saab 9-4X 2011) is the left front side impact sensor, reported for shorts, opens, current above 23 mA, internal failure, a wrong part or invalid serial data. Only the make tells which part is meant.
B0085 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of B0085
- Airbag warning lamp on
- On GM vehicles the code clears from history only after 100 fault-free ignition cycles
- Safety note: pyrotechnic restraint parts; work only de-energised at a specialist workshop
Common causes of B0085
- Most likelyOn GM vehicles, left front side impact sensor or its door wiring faulty (different meaning)
- PossibleLead to the right rear retractor pinched by seat or trim
- Less likelyInternal fault of the right rear limiter squib
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Second row right load limiterSquib circuitSRS control module
What each part of B0085 means
| B | Body system: airbags, seat belts, power seats, lights and climate control. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 85 | The exact fault in that area. |
What to do next
- Note B0085 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about B0085
What does B0085 mean?
B0085 means "Second Row Right Seat Belt Load Limiter Deployment Control". B0085 points to the igniter circuit that would change the force level of the right rear belt. It is a generic code, so it means the same on every make.
Is it safe to drive with B0085?
B0085 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will B0085 fail an emissions test?
B0085 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is B0085 to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will B0085 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.