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DTC codes / B00xx · Airbags, seats, doors, lights and comfort systems / B00B5

B00B5Driver Seat Track Position Restraints Sensor

B00B5 indicates that the restraints control module has detected a fault in the driver seat track position sensor circuit, which is used to determine how far forward or rearward the seat is positioned for airbag deployment tailoring. The module monitors the sensor's signal voltage and sets this code when the reading falls outside the expected range or is inconsistent with other seat position data.

SystemBody
Code typeGeneric (all makes)
SeverityMedium
Fix difficultyIntermediate
AreaAirbags, seats, doors, lights and comfort systems

Symptoms you may notice

  • Airbag warning light illuminated on the instrument cluster
  • Seat position memory or easy-entry feature may stop working
  • In some vehicles, the seat may not move to its programmed position when recalled
  • Often no symptoms besides the warning light
  • Intermittent warning light that comes and goes over bumps or when adjusting the seat
  • Passenger airbag may be automatically disabled if the system cannot confirm seat position

Common causes, most likely first

  1. Faulty seat track position sensor or its internal potentiometer
  2. Damaged or chafed wiring harness under the seat, often from seat movement
  3. Loose or corroded electrical connector at the sensor or under the seat
  4. Failed seat track position sensor magnet or target (on magnetic-type sensors)
  5. Restraints control module software issue or internal fault
  6. Aftermarket seat covers or objects obstructing the sensor mechanism

How to diagnose and fix it

  1. Inspect the under-seat wiring and connectors for damage, corrosion, or looseness; repair as needed
  2. Check for technical service bulletins (TSBs) related to the seat track position sensor or restraints system
  3. Use a scan tool to read live data from the seat track position sensor while moving the seat through its range
  4. Perform a resistance or voltage test on the sensor according to the manufacturer's procedure
  5. If the sensor signal is erratic or out of specification, replace the seat track position sensor
  6. Clear the code and verify the repair by cycling the ignition and moving the seat; confirm the light stays off
  7. If the code persists after sensor replacement, diagnose the restraints control module and its programming

What most technicians overlook on B00B5

  • A seat track position sensor that is mechanically stuck or misaligned due to debris or a bent bracket can set this code even though the electrical circuit tests fine.
  • The restraints control module may set B00B5 if battery voltage is low during cranking, so always check the battery and charging system before condemning the sensor.
  • On some vehicles, the seat track position sensor is part of the seat weight sensor assembly, and replacing only the track sensor may not resolve the issue if the weight sensor is also faulty.
  • After any seat removal or replacement, the seat track position sensor must be recalibrated with a scan tool; skipping this step will cause the code to return immediately.
  • A code for the driver seat track position sensor does not always mean the airbag will fail to deploy; it may only affect the dual-stage deployment strategy, but the system should still be repaired promptly.

Can I keep driving with B00B5?

The vehicle is generally safe to drive with B00B5 because the airbag system will default to a conservative deployment strategy, but the airbag warning light will remain on and the system may not perform optimally in a crash. Have the fault diagnosed and repaired promptly, and avoid any unnecessary seat adjustments until then.

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.

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