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DTC codes / B00xx · Airbags, seats, doors, lights and comfort systems / B00F1

B00F1Passenger Inflatable Seat Belt Deployment Control

B00F1 indicates that the restraint control module has detected a fault in the deployment circuit for a passenger inflatable seat belt, which is a seat belt with an integrated airbag designed to reduce chest and head injuries in 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.
  • A message such as 'Service Restraint System' or 'Check Airbag' may appear in the driver information center.
  • The passenger inflatable seat belt may not deploy in a collision, reducing occupant protection.
  • Other restraint functions, such as seat belt pretensioners or passenger frontal airbag, may be disabled as a fail-safe.
  • Often no symptoms besides the warning light, with the vehicle driving normally.

Common causes, most likely first

  1. Damaged or chafed wiring in the passenger inflatable seat belt deployment circuit, often at the seat hinge or under the seat.
  2. A faulty passenger inflatable seat belt module or its internal squib, which can fail open or shorted.
  3. Corroded or loose electrical connectors at the seat belt buckle, seat module, or restraint control module.
  4. A defective restraint control module that cannot properly monitor or command the deployment circuit.
  5. Water intrusion or physical damage to the seat belt assembly from spills, accidents, or seat movement.
  6. Aftermarket accessories or improper prior repairs that disturb the seat belt wiring or connectors.

How to diagnose and fix it

  1. Inspect the passenger inflatable seat belt wiring and connectors for visible damage, corrosion, or loose pins, especially around the seat tracks and hinge areas.
  2. Use a scan tool to read restraint control module data and check for other stored codes that may indicate a related circuit fault.
  3. Measure the resistance of the deployment circuit at the seat belt connector and compare it with the manufacturer's specification.
  4. Perform a wiggle test on the harness while monitoring circuit resistance to reveal intermittent faults.
  5. If the circuit tests within specification, substitute a known-good inflatable seat belt assembly only for diagnostic purposes and clear the code.
  6. Check for technical service bulletins or software updates for the restraint control module that address false or intermittent B00F1 setting.
  7. After repair, clear the code and verify that it does not return, then confirm all restraint system monitors are ready.

What most technicians miss on B00F1

  • A common oversight is replacing the inflatable seat belt assembly before checking the seat harness where it flexes with seat movement, since chafed wires there often mimic a failed belt module.
  • The code can be set by a low battery or voltage spike during cranking, so always verify battery health and charging system operation before condemning restraint components.
  • Some vehicles require the restraint control module to be configured or programmed after replacement, and skipping this step can leave B00F1 stored even with a good belt.
  • B00F1 does not always mean the inflatable seat belt itself has failed; the fault may lie in the connector under the seat or in the restraint control module's internal monitoring circuit.
  • Aftermarket seat covers or heavy objects stored under the seat can pinch or stress the deployment wiring, causing intermittent B00F1 codes that disappear when the obstruction is removed.

Can I keep driving with B00F1?

Because this fault can prevent the passenger inflatable seat belt from deploying in a crash, have it diagnosed promptly and avoid carrying passengers in that seat until repaired. The vehicle remains driveable, but do not ignore the warning light or assume the restraint system is fully functional.

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.

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