A damaged or disconnected electrical connector at the second-row left seat belt pretensioner.; Corroded or frayed wiring in the pretensioner circuit, often due to moisture or seat movement.; An open or shorted pretensioner squib (the small explosive charge that tensions the belt).; A faulty restraint control module that is unable to communicate with or drive the pretensioner circuit.; A poor ground connection for the pretensioner or restraint module.; Aftermarket accessories or previous repairs that disturbed the pretensioner wiring.

DTC codes / B00xx · Airbags, seats, doors, lights and comfort systems / B007B

B007BSecond Row Left Seat Belt Pretensioner B Deployment Control

Q: What does code B007B mean?

Second Row Left Seat Belt Pretensioner B Deployment Control. B007B indicates that the restraint control module has detected a fault in the deployment circuit for the second-row left seat belt pretensioner, which is the device that tightens the belt during a crash. The module monitors the circuit's resistance and continuity and sets this code when the readings fall outside the expected range or when a deployment command cannot be verified.

B007B indicates that the restraint control module has detected a fault in the deployment circuit for the second-row left seat belt pretensioner, which is the device that tightens the belt during a crash. The module monitors the circuit's resistance and continuity and sets this code when the readings fall outside the expected range or when a deployment command cannot be verified.

SystemBody

Code typeGeneric (all makes)

SeverityHigh

Fix difficultyProfessional

AreaAirbags, seats, doors, lights and comfort systems

Symptoms you may notice

The airbag or supplemental restraint system warning light stays illuminated on the dashboard.
The seat belt reminder chime may sound continuously or intermittently even when the belt is buckled.
The pretensioner may not activate during a collision, increasing injury risk for the second-row left occupant.
In some vehicles, other restraint functions such as seat belt reminders for other positions may be disabled.
Often no symptoms besides the warning light, with the vehicle driving normally.

Common causes, most likely first

A damaged or disconnected electrical connector at the second-row left seat belt pretensioner.
Corroded or frayed wiring in the pretensioner circuit, often due to moisture or seat movement.
An open or shorted pretensioner squib (the small explosive charge that tensions the belt).
A faulty restraint control module that is unable to communicate with or drive the pretensioner circuit.
A poor ground connection for the pretensioner or restraint module.
Aftermarket accessories or previous repairs that disturbed the pretensioner wiring.

How to diagnose and fix it

Verify the code with a scan tool that can read restraint system codes and check for any related codes in other modules.
Inspect the pretensioner connector and wiring for damage, corrosion, or loose pins, and repair as needed.
Measure the resistance of the pretensioner squib with a digital multimeter and compare it to the manufacturer's specification.
Check the continuity and insulation of the wiring between the restraint control module and the pretensioner.
Test the restraint control module's output to the pretensioner if the wiring and squib test good.
Replace the faulty pretensioner or restraint control module as required, following the manufacturer's procedures.
Clear the codes and perform a system verification to ensure the warning light goes out and the code does not return.

Why the pretensioner code often misleads

A common mistake is replacing the pretensioner when the real fault is a corroded connector under the second-row seat, which is exposed to spills and moisture.
The code can be set by a low battery or a voltage spike during jump-starting, so always check the battery and charging system before condemning parts.
Some vehicles require the restraint control module to be configured or programmed after replacement, and skipping this step will leave the code stored.
The pretensioner circuit is monitored only when the ignition is on, so an intermittent fault may not appear during a quick test drive.
After any airbag or pretensioner deployment, the module and all affected components must be replaced, and this code may be a remnant of a previous deployment that was not properly repaired.

Can I keep driving with B007B?

Because the pretensioner may not function in a crash, have the fault diagnosed and repaired promptly; avoid heavy loads or passengers in the second-row left seat until the system is fixed, and do not attempt to repair the pretensioner circuit yourself.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.