What it means
This code identifies a fault associated with the first-row center seatbelt pretensioner deployment control. The failure type byte specifies the detected fault.
How it works
The first-row center seat-belt pretensioner tightens the center-position belt during a qualifying crash. The restraint control module monitors its deployment-control circuit, and B0071 indicates a fault associated with that circuit; the failure type byte provides the specific subfault.
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 restraint module's failure type byte and freeze-frame details to identify the reported first-row center pretensioner circuit condition.
- Inspect the first-row center belt, retractor, and accessible harness for damage, obstruction, or signs of previous seat or interior work.
- Check the center pretensioner connectors and wiring for looseness, corrosion, damaged pins, or chafing, observing the manufacturer's restraint-system safety instructions.
- Test the center pretensioner deployment circuit for an open or short using the manufacturer's procedure and specification.
- If wiring passes, assess the first-row center pretensioner and then the restraint control module according to the manufacturer's diagnostic sequence.
Common fixes
- Reconnect or repair damaged first-row center pretensioner wiring using the approved procedure.
- Repair a confirmed open or short in the center deployment circuit.
- Replace the first-row center pretensioner if its test results identify it as faulty.
- Repair or replace the restraint control module only if the circuit and pretensioner test correctly.
Can I keep driving?
The vehicle may be driveable, but the first-row center belt pretensioner may not operate in a crash. Avoid using that seating position until the restraint fault is diagnosed and repaired.
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.