B00B3 code meaning
Driver Seat Occupant Classification Sensor D
What B00B3 means
B00B3 refers to the fourth of five driver seat classification inputs. No carmaker publishes it, and the mapping of letters to sensors is undocumented. A fourth input can rest on a different principle: Delphi patented a silicone-filled bladder between cushion foam and seat frame, carrying a pressure sensor and capacitive films whose spacing shrinks under load, so that weight and its spread over the cushion are estimated and cross-checked. Honda's job aid for its passenger seat weight sensors shows the service side: the sensors sit in the seat base or frame, need recalibration after a sensor or unit is replaced, and a binding sensor may be freed by loosening, shaking and retorquing the seat. Worn seat harnesses can also set such codes. A stored B00B3 lights the airbag lamp.
B00B3 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 B00B3
- Airbag warning lamp on
- Classification of the driver unavailable for airbag staging
- Safety note: airbag system; unplug seat and sensor connectors only de-energised (ignition off, battery off, wait time); recalibrate after any sensor change, specialist workshop only
Common causes of B00B3
- Most likelySeat harness worn by seat movement, open or intermittent contact to input D
- PossibleSensor binding or preloaded in the seat structure
- PossibleRecalibration not done after sensor or unit replacement
- Less likelyInternal fault of the sensor, e.g. leaking bladder or failed pressure cell
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Driver classification sensor dSRS seat wiringSRS control module
What each part of B00B3 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). |
| B3 | The exact fault in that area. |
What to do next
- Note B00B3 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 B00B3
What does B00B3 mean?
B00B3 means "Driver Seat Occupant Classification Sensor D". B00B3 refers to the fourth of five driver seat classification inputs. It is a generic code, so it means the same on every make.
Is it safe to drive with B00B3?
B00B3 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will B00B3 fail an emissions test?
B00B3 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 B00B3 to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will B00B3 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.