B0015
Left Front Seatbelt Pretensioner Deployment Control
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Code B0015 indicates a problem with the left front (driver side) seatbelt pretensioner deployment control circuit. Seatbelt pretensioners are pyrotechnic devices built into the seatbelt retractor or buckle that instantly tighten the belt against the occupant's body during a collision. This removes any slack in the belt, holding the occupant firmly in position before the airbags deploy and reducing the risk of the occupant 'submarining' under the belt.
When this code is set, the airbag control module has detected an issue with the electrical circuit that would fire the pretensioner. The seatbelt itself will continue to work normally for everyday use — it will still lock during hard braking and hold you in place. However, the pretensioner function that activates during a crash will be disabled, reducing overall occupant protection.
Diagnosis requires an SRS scan tool to determine the specific sub-fault. Technicians will check the wiring from the airbag control module to the pretensioner, paying close attention to connectors under the seat and at the B-pillar. If the wiring checks out, the pretensioner assembly itself may need replacement. Since pretensioners contain explosive charges, this repair should only be performed by trained professionals following proper safety procedures.
Severity
Symptoms
- •Airbag or SRS warning light on dashboard
- •Seatbelt warning indicator may behave abnormally
- •Warning chime related to restraint system at startup
- •No change in seatbelt function during normal use — the pretensioner may not fire in a crash
- •Possible message on instrument display about restraint system malfunction
Likely Causes
The wiring for the left front seatbelt pretensioner runs under the driver seat and along the B-pillar. This routing exposes it to moisture, dirt, and physical damage from items sliding under the seat.
The pretensioner contains a pyrotechnic charge that rapidly retracts the seatbelt during a crash. If the squib resistance drifts out of specification, the airbag control module flags this deployment loop.
The SRS controller monitors the pretensioner loop continuously. An internal monitoring circuit failure can cause the module to incorrectly detect a fault on this loop.
The electrical connector at the seatbelt retractor or buckle assembly can loosen or corrode, especially if the vehicle has been exposed to water intrusion or flooding.
Estimated Cost
Professional Repair
Includes parts + labor
Common Fixes
- Inspect and repair wiring and connectors at the seatbelt retractor and buckle
- Replace the left front seatbelt pretensioner assembly
- Clean or replace corroded electrical connectors
- Replace the airbag control module if an internal fault is confirmed