Airbags

B00B5 — Driver Seat Track Position Sensor Fault in the SRS

Severity: medium Drive with care, to a shop

What B00B5 means

The SRS control module uses a sensor on the seat track to learn how far forward or back the driver is sitting. It uses that data to choose how the front airbag and belt pretensioner should deploy. B00B5 means the sensor signal is missing, out of range or the circuit is faulty (a subfault).

Symptoms

  • Airbag warning light on or flashing
  • SRS or restraint system warning message
  • Code B00B5 stored in the SRS module
  • Light may appear after moving the seat or work under it

Possible causes

  1. Failed seat track position sensor
  2. Open, shorted or damaged wiring under the seat
  3. Corroded or loose sensor connector
  4. Wire pinched or stretched by seat movement
  5. Rarely, a faulty SRS control module

How to diagnose

  1. Scan with a tool that reads SRS codes, confirm B00B5 and note the freeze frame data
  2. Inspect the harness and connector under the driver seat for damage, strain or corrosion
  3. Disconnect the battery and wait the time the manufacturer specifies before unplugging any SRS connector to avoid accidental deployment
  4. Check the sensor connector for a tight fit, clean terminals and good pin tension
  5. Test the sensor circuit for opens and shorts to ground or voltage using the wiring diagram
  6. Check the sensor's resistance or signal while sliding the seat along its track
  7. Clear the code after repair and confirm it does not return

Common fixes

  • Repair or replace damaged wiring and the sensor connector
  • Clean the terminals and secure the connector firmly
  • Replace the seat track position sensor
  • Re-route the harness so it does not tighten when the seat moves

Questions and answers

What does B00B5 mean?

It is a circuit fault in the driver seat track position sensor used by the SRS. The airbag module is not getting valid data about where the driver sits.

Can I drive with B00B5 set?

The car will drive normally, but crash protection may not work as designed. Do not put off diagnosis.

Can I check the connector under the seat myself?

Only after disconnecting the battery and waiting the specified time, otherwise an airbag could deploy accidentally. If you are not experienced with SRS, use a shop.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.