What it means
This code identifies a fault associated with the passenger seatbelt pretensioner B deployment control. The failure type byte specifies the detected fault.
How it works
The passenger seatbelt pretensioner B is part of the SRS restraint system and is designed to tighten the passenger's belt in a crash. The restraints control module monitors its deployment circuit and stores this code when it detects a fault; the accompanying subfault information identifies the failure type. The letter B alone does not specify a particular 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 to establish the reported circuit condition and when it occurred.
- Inspect the passenger belt pretensioner area, connectors, and harness for damage, corrosion, looseness, or pinching.
- Check for other SRS codes that may indicate a shared module power, ground, or connector issue.
- With the SRS made safe according to the manufacturer's procedure, test the passenger pretensioner B wiring for the open or short indicated by the subfault.
- If the circuit wiring passes, test the passenger pretensioner B and restraints control module using the manufacturer's diagnostic procedure.
Common fixes
- Secure or repair a loose, damaged, or corroded passenger pretensioner B connector.
- Repair an open or short in the passenger pretensioner B deployment wiring.
- Replace the passenger seatbelt pretensioner B assembly if testing confirms it is faulty.
- Repair or replace the restraints control module if its fault is confirmed after circuit checks.
Can I keep driving?
The vehicle may be driveable, but the passenger belt pretensioner may not work as intended in a crash. Keep the passenger restrained correctly and arrange prompt SRS diagnosis; do not probe deployment wiring outside 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.