Airbags

B00B7 — Driver Seat Occupant Position Sensor A Fault

Severity: medium Safe to drive

What B00B7 means

The supplemental restraint system (SRS) control module monitors a sensor in the driver seat to learn how the occupant is seated, so it can adjust airbag and pretensioner deployment. B00B7 is stored when the signal from sensor A is missing, implausible or out of range. The airbag warning light usually comes on.

Symptoms

  • Airbag (SRS) warning light is on
  • Driver seat occupant detection works incorrectly
  • Stored code with no engine performance problems
  • Light may come and go depending on seat position

Possible causes

  1. Failed driver seat occupant position sensor A
  2. Open, shorted or corroded wiring to the sensor
  3. Poor connection at the under-seat connector, often from seat movement
  4. Faulty SRS control module or occupant detection module
  5. Missing power or ground at the sensor circuit

How to diagnose

  1. Scan all modules with a tool that reads SRS codes and save the freeze frame data
  2. Inspect the harness and connector under the seat for tension, chafing, moisture and corrosion
  3. Check whether the wiring is damaged when the seat slides forward and back
  4. Make sure nothing is stuck under the seat and the seat was not recently removed or adjusted
  5. Measure power, ground and signal at the sensor using the factory wiring diagram
  6. Check sensor resistance and wire continuity to the SRS module
  7. Clear the code and see if it returns after a drive and seat position changes

Common fixes

  • Replace the driver seat occupant position sensor A
  • Repair the wiring harness or replace the damaged connector
  • Clean and securely reseat connector terminals
  • Replace the SRS or occupant detection module if the circuits test good

Questions and answers

Can I drive with code B00B7?

Yes, the car will drive normally. The airbag system may not respond correctly in a crash though, so get it checked soon.

How do I clear B00B7?

A scan tool with SRS functions can clear it, but it will return if the fault remains. Find the cause first, starting with the connector and wiring under the seat.

Can I repair SRS components myself?

You can visually inspect connectors, but be careful around airbag systems. Disconnect the battery and wait the time listed in the service manual before working.

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.