A damaged or disconnected electrical connector at the third row left pretensioner.; Corroded or bent terminals in the pretensioner harness connector.; A short circuit or open circuit in the wiring between the restraint control module and the pretensioner.; A faulty seat belt pretensioner assembly with an internal open or shorted deployment squib.; Water intrusion or physical damage to the pretensioner or its wiring from cargo or seat movement.; A malfunctioning restraint control module that incorrectly sets the code despite a good circuit.; Aftermarket accessories or previous repairs that disturbed the pretensioner circuit.

DTC codes / B00xx · Airbags, seats, doors, lights and comfort systems / B00E7

B00E7Third Row Left Seat Belt Pretensioner C Deployment Control

Q: What does code B00E7 mean?

Third Row Left Seat Belt Pretensioner C Deployment Control. B00E7 indicates that the restraint control module has detected a deployment circuit fault in the third row left seat belt pretensioner, which is the pyrotechnic device that tightens the belt during a crash. The module monitors the circuit's resistance and continuity, and it sets this code when the readings fall outside the expected range or when the deployment command cannot be verified.

B00E7 indicates that the restraint control module has detected a deployment circuit fault in the third row left seat belt pretensioner, which is the pyrotechnic device that tightens the belt during a crash. The module monitors the circuit's resistance and continuity, and it sets this code when the readings fall outside the expected range or when the 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 pretensioner for the third row left seating position may not deploy in a collision.
Often no symptoms besides the warning light, with the belt functioning normally during everyday use.
A stored diagnostic trouble code may be the only clue during a routine scan.
In some vehicles, the restraint system may be disabled entirely as a fail-safe.
Intermittent warning light operation if the fault is a loose connection or chafed wire.

Common causes, most likely first

A damaged or disconnected electrical connector at the third row left pretensioner.
Corroded or bent terminals in the pretensioner harness connector.
A short circuit or open circuit in the wiring between the restraint control module and the pretensioner.
A faulty seat belt pretensioner assembly with an internal open or shorted deployment squib.
Water intrusion or physical damage to the pretensioner or its wiring from cargo or seat movement.
A malfunctioning restraint control module that incorrectly sets the code despite a good circuit.
Aftermarket accessories or previous repairs that disturbed the pretensioner circuit.

How to diagnose and fix it

Scan all modules and record all stored codes, then clear the code and verify whether it returns immediately.
Visually inspect the third row left pretensioner connector and wiring for damage, corrosion, or loose pins.
Disconnect the battery and wait the specified time, then check the pretensioner circuit resistance with a digital multimeter and compare to the manufacturer's specification.
Perform a wiggle test on the harness while monitoring the circuit to reveal intermittent faults.
If the circuit tests good, substitute a known-good pretensioner or use a simulator to isolate the fault to the module or the pretensioner.
Repair or replace damaged wiring and connectors, then clear codes and verify the warning light goes out.
If the pretensioner itself is faulty, replace it with a new unit and confirm the system passes all self-tests.

What most technicians overlook on B00E7

A common mistake is replacing the pretensioner when the real fault is a chafed wire under the third row seat where cargo or seat folding has worn through the insulation.
The code can be set by a poor connection at the restraint control module itself, so always check both ends of the circuit before condemning any component.
After any repair, the restraint control module may require a learn or reset procedure with a scan tool before the warning light will extinguish.
A low battery or charging system fault can cause the module to set this code spuriously, so verify system voltage is correct before diagnosing the circuit.
Never use a standard ohmmeter on an undeployed pretensioner without following the manufacturer's safety procedure, as the meter's current could theoretically trigger deployment.

Can I keep driving with B00E7?

Because the third row left pretensioner may not deploy in a crash, the vehicle's occupant protection is compromised for that seating position. Avoid carrying passengers in the third row left seat and have the fault diagnosed and repaired promptly; do not attempt to clear the code and continue driving as if the system were fully functional.

Tools that help

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