Code
B0092
HUMMER
B — Body
PPS passenger detection error
AI status
Completed
Completed
100%
Causes
- Faulty passenger presence sensor (seat mat or module)
- Damaged or corroded connector or wiring in seat harness
- Poor ground or supply voltage to the sensor/module
- Water intrusion or physical damage to the sensor mat
- Aftermarket seat covers, cushions or accessories interfering with sensor
- Incomplete or failed passenger presence system calibration/relearn
Symptoms
- SRS/airbag warning lamp illuminated
- Passenger airbag status indicator may show OFF when occupied or may be unavailable
- Inability to enable/disable passenger airbag automatically
- Stored DTC B0092 and possibly related occupant-sensing codes
- Diagnostic tool shows inconsistent passenger presence status or no communication with PPS module
What to check
- Read and record DTCs and freeze-frame data with an appropriate scan tool
- Visually inspect passenger seat, seat cushion, seat covers and under-seat area for foreign objects, water damage, or debris
- Inspect connectors under the passenger seat for corrosion, bent pins, or loose mating
- Check wiring harness for chafing, broken wires, or damaged insulation from seat movement
- Verify no aftermarket seat covers, cushions or child seats are interfering with the sensor
- Confirm battery voltage and good chassis ground at the seat harness ground point
Signal parameters
- Passenger presence/sensor raw value (voltage or resistance) reported by PPS
- Occupant classification status (e.g., Empty/Child/Adult/Unknown) from occupant sensing module
- Supply voltage to sensor (typically 5 V reference)
- Sensor ground continuity
- Seat module/RCM CAN bus communication status and errors
- Freeze frame: vehicle speed, ignition status, seat belt state, sensor reading at fault time
Diagnostic algorithm
- Connect suitable SRS-capable scan tool, read and record B0092 and any related DTCs and freeze frame data.
- Visually inspect the passenger seat, cushion, connectors and harness for contamination, damage, corrosion or foreign objects. Remove any aftermarket covers or cushions and retest.
- With the connector exposed, check for bent pins, corrosion and secure mating. Clean and reseat connectors as required.
- Verify sensor supply and ground at the PPS connector (backprobe): confirm reference voltage and ground continuity per manufacturer specification.
- Measure the passenger presence sensor (seat mat) resistance or signal while changing load (sitting/standing) and compare to expected values from repair information.
- Wiggle the harness and connectors while monitoring live data for intermittent changes that reproduce the fault.
- If wiring and connectors are good, verify/perform any required occupant classification system calibration or relearn procedure per service manual.
- If sensor/module still fails tests, replace the passenger presence sensor/module and secure connectors; use only approved replacement parts and follow torque/fastening instructions.
- After repair, clear codes and verify the system returns to normal operation and the passenger airbag enable/disable logic behaves correctly. Recheck for DTCs after a test drive if required.
- If fault persists, escalate to RCM/airbag module communication diagnosis or consult manufacturer technical service information.
Likely causes
- Corroded/loose connector under the passenger seat
- Damaged sensor mat from wear or liquid spill
- Aftermarket seat cover or object on seat causing incorrect detection
- Failed passenger presence module
- Failed/incorrect relearn after seat removal or repair
Fault status
Status
Passenger Presence Sensor error detected by the occupant classification/passenger sensing system. The system may disable or incorrectly control the passenger airbag until fault is repaired.
Repair difficulty: Medium
Diagnostic time: 1.0-2.5 hours
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Repair manuals
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138
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