B00B7 code meaning
Driver Seat Occupant Position Sensor A
What B00B7 means
B00B7 is the first of five occupant position sensors for the driver seat. No carmaker publishes the code, and J2012 does not say which sensor the letter A means. Position sensing serves the DASS route of FMVSS 208, which also exists for the driver: the driver bag must already be suppressed when a test dummy's head, neck or chest moves into a zone next to the cover that the maker defines. Ultrasound is one way to watch that zone; an Automotive Systems Laboratory patent crosses beams from transmitters in the headliner about eight inches in front of the airbag door, asks for an update within 10 ms and treats any undiagnosed fault as a reason to disable the bag. A stored B00B7 therefore means the module has lost this view and the airbag lamp is on.
B00B7 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of B00B7
- Airbag warning lamp on
- Out-of-position suppression of the driver airbag unavailable
- Safety note: airbag system; disconnect sensor and seat plugs only de-energised (ignition off, battery off, wait time); calibrate/initialise position sensors after replacement, specialist workshop only
Common causes of B00B7
- Most likelyOpen or poor contact in the lead to position sensor A (e.g. headliner or trim harness)
- PossibleSensor face covered, dirty or misaligned after trim work
- Less likelyInternal fault of position sensor A
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Driver occupant position sensor aSRS wiringSRS control module
What each part of B00B7 means
| B | Body system: airbags, seat belts, power seats, lights and climate control. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| B7 | The exact fault in that area. |
What to do next
- Note B00B7 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about B00B7
What does B00B7 mean?
B00B7 means "Driver Seat Occupant Position Sensor A". B00B7 is the first of five occupant position sensors for the driver seat. It is a generic code, so it means the same on every make.
Is it safe to drive with B00B7?
B00B7 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will B00B7 fail an emissions test?
B00B7 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is B00B7 to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will B00B7 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.