Occupant Classification System Sensor Fault

The car's brain thinks there's a problem with the seat sensors that detect if someone is sitting there and how heavy they are, which is crucial for airbag deployment.

The OBD system sees an error in the circuit related to the occupant classification sensors. This could indicate improper signal levels that don’t match expected ranges during seat occupancy tests.

Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.

1. 11. Check the vehicle’s fuse for the airbag and occupant classification system; replace if blown. Decision: Is the fuse intact? Yes: Go to step 2. No: Replace the fuse and retest.
2. 22. Inspect wiring and connectors under the seat for damage or corrosion; repair as needed. Decision: Is the wiring/connectors intact? Yes: Go to step 3. No: Repair or replace wiring/connectors and retest.
3. 33. Use a scan tool to check live data from the occupant sensors; look for proper resistance values during occupancy tests. Decision: Do the sensor values match expected values? Yes: Go to step 4. No: Replace the occupant weight sensor and retest.
4. 44. If issues persist, test or replace the airbag control module.

• Faulty occupant weight sensor
• Wiring issues in the sensor circuit
• Faulty airbag control module
• Disconnected or corroded connectors

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