What it means
This code identifies a fault associated with the driver seatbelt pretensioner B deployment control. The failure type byte specifies the detected fault; the code does not establish that this is a secondary tightening stage.
How it works
The driver seatbelt pretensioner B is part of the SRS restraint system and is designed to tighten the driver's belt in a crash. The restraints control module monitors its deployment circuit and stores this code when the circuit reports a fault; the accompanying subfault information identifies the detected failure type. The letter B does not by itself establish a secondary tightening stage.
Common causes
Most likely first.
- Pretensioner circuit wiring or connector fault
- Open or short in the deployment circuit
- Faulty pretensioner
- Restraints control module fault
Symptoms
- Airbag or SRS warning light
- Pretensioner may not operate as intended in a crash
How to diagnose it
- Read the SRS module's subfault details and freeze-frame data first to identify the reported circuit condition and when it occurred.
- Inspect the driver belt buckle and pretensioner area, connectors, and harness for damage, corrosion, loose connections, or pinching.
- Check for related SRS codes that could point to a shared module power, ground, or connector problem.
- With the SRS made safe according to the manufacturer's procedure, test the driver pretensioner B wiring for an open or short as indicated by the subfault.
- If the wiring passes, have the pretensioner and restraints control module checked using the manufacturer's diagnostic procedure.
Common fixes
- Secure or repair a loose, damaged, or corroded driver pretensioner B connector.
- Repair an open or short in the driver pretensioner B circuit wiring.
- Replace the faulty driver seatbelt pretensioner B assembly if testing confirms it has failed.
- Repair or replace the restraints control module only after its circuit and connections have been verified.
Can I keep driving?
The vehicle may remain driveable, but the driver's belt pretensioner may not work as intended in a crash. Wear the belt correctly and arrange prompt SRS diagnosis; do not probe or handle deployment-circuit wiring unless following the manufacturer's safety procedure.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.