Airbags

B0085 — Second Row Right Seatbelt Load Limiter Control Fault

Severity: medium Safe to drive

What B0085 means

The restraint control module detected a problem in the control circuit for the load limiter on the second row right seatbelt. In a severe crash, the load limiter lets the belt pay out slightly to reduce the force on the occupant's chest. The module monitors this circuit constantly and sets the code and SRS light when readings are out of range.

Symptoms

  • Airbag/SRS warning light on
  • Seatbelt warning light on or flickering
  • Other SRS or seatbelt codes stored alongside
  • Fault may come and go, for example over bumps

Possible causes

  1. Faulty load limiter sensor or actuator in the second row right belt
  2. Open, short or high resistance in the wiring harness of this circuit
  3. Corroded or loose connectors under the seat or in the body pillar
  4. Wiring damaged during seat or trim removal
  5. Restraint control module fault (uncommon)

How to diagnose

  1. Scan all modules with an SRS-capable tool and note any related codes
  2. Inspect the right rear seatbelt assembly and its connector for damage or moisture
  3. Check the harness and connectors along the pillar and under the seat for corrosion, chafing or loose locks
  4. Measure circuit resistance and test for shorts to ground or power using the factory wiring diagram
  5. Clear the code and see if it returns after wiggling the harness
  6. If wiring is good, test the belt assembly by swapping in a known good unit
  7. Disconnect the battery and wait the specified time before working to avoid accidental deployment

Common fixes

  • Clean and securely reseat the connectors in the belt circuit
  • Repair or replace the damaged wiring harness
  • Replace the seatbelt assembly or its sensor
  • Replace the SRS control module if confirmed faulty

Questions and answers

What does B0085 mean?

It points to a fault in the control circuit for the second row right seatbelt load limiter. The SRS module sees a problem with the sensor, wiring or connector and lights the warning.

Can I drive with B0085?

Yes, the car will drive normally. But protection for the right rear passenger may be reduced in a crash, so have it diagnosed soon.

Can I just clear the code?

Clearing it may turn off the light briefly. If the cause is wiring or the sensor, the code will return and the system stays faulty.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.