Code
B00CB
Generic
B — Body
Passenger Seat Occupant Position Sensor E
AI status
Completed
Completed
100%
Causes
- Intermittent or open/shorted wiring between sensor and occupant classification module (OCM)
- Poor connector contact or corrosion at the seat sensor connector
- Failed occupant position sensor (internal fault)
- Faulty occupant classification/airbag control module or software glitch
- Improper seat installation, damage to seat frame or sensor mounting
- Water intrusion or physical damage to the sensor or harness
Symptoms
- Passenger airbag status light may show OFF/ON incorrectly or flash
- SRS/airbag warning lamp illuminated on dash
- Possible chime or message indicating passenger seat fault
- Passenger airbag may be disabled or the system may enter a fallback/limp state
- Stored B00CB (and possibly related B‑codes) in body/airbag module
What to check
- Record freeze frame and all airbag/occupant-classification related DTCs from the diagnostic tool
- Visually inspect passenger seat area: seat tracks, connectors under seat, sensor mounting, signs of water or damage
- Verify connector is fully seated; inspect for bent, corroded or pushed‑out pins
- With ignition ON (or following manufacturer test procedure) measure reference and ground at the sensor connector
- Perform wiggle test of the seat wiring while monitoring live data/voltage to reproduce the fault
- Check for required post-repair or calibration procedures (service bulletins)
Signal parameters
- Reference supply: typically 5 V reference (verify exact spec for vehicle) at sensor connector with ignition ON
- Sensor signal: variable voltage (commonly ~0.5–4.5 V depending on position) or resistance that changes as seat/weight/position changes — should be stable and change smoothly when seat/occupant moves
- Ground:
- Open circuit: infinite/very high resistance between sensor and module pins
- Short to power: signal near battery voltage (~12 V) or short to ground: signal near 0 V
Diagnostic algorithm
- Read and record all related airbag/occupant classification DTCs and freeze frame data with a capable scanner
- Follow SRS safety procedures before working on seat/airbag components (disable airbag system per manufacturer instructions)
- Visually inspect sensor, harness, and connectors for damage, corrosion, or water intrusion; repair or secure as needed
- Check connector pin condition and continuity: disconnect connector and measure reference voltage, signal, and ground at harness side with connectors mated/unmated as appropriate
- Measure sensor output while moving the seat or occupant weight distribution (if safe) to confirm smooth changing signal; look for intermittent dropouts
- Perform continuity/resistance tests between sensor connector and occupant classification module to detect opens/shorts – repair wiring as required
- If wiring and connectors are good, replace suspect sensor (Seat Occupant Position Sensor E) and retest
- If replacement does not clear fault, test/replace occupant classification or airbag control module per manufacturer instructions and perform required calibrations/relearns
- Clear codes and perform final confirmation test drive or occupant changes to ensure code does not return
Likely causes
- Broken/shorted wiring harness under the passenger seat
- Corroded or pushed-back connector pins at the sensor or module
- Sensor element failure due to impact or moisture
- Module input circuit fault or intermittent connector at module
Fault status
Status
B00CB — Passenger Seat Occupant Position Sensor E circuit fault (open/short/intermittent). Follow SRS precautions when servicing.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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