Occupant Classification System Malfunction
The vehicle's system for classifying the driver or passenger seat occupant has a fault.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The computer is having trouble figuring out whether there's a person in the seat and how to handle the airbags. This usually involves sensors in the seat that measure weight or pressure.
What the computer is actually seeing
The occupant classification module is not receiving expected signals from the seat pressure sensors, which are supposed to input weight data to help determine if an airbag should deploy or be deactivated.
What a healthy reading looks like
Weight readings should be consistent with expected thresholds, typically 10-12 lbs for a child and 80+ lbs for an adult. Voltage from sensors should be between 0.5V and 4.5V depending on weight.
Guided diagnostic — the DiagCoach way
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.
- 11. Inspect the wiring and connectors under the seat for damage or loose connections. Repair as needed. Decision: If wiring is intact, proceed to step 2.
- 22. Check the weight sensor for continuity using a multimeter. Expected resistance should be between 100-150 ohms. Decision: If resistance is out of range, replace the seat sensor. If within range, proceed to step 3.
- 33. Use a scan tool to check for other codes and clear the code. Test drive the vehicle for a few minutes to see if the code returns. Decision: If the code comes back, consider replacing the occupant classification module.
Common causes
- Faulty weight sensor in the seat
- Damaged wiring or connectors to the sensor
- Faulty occupant classification module
- Calibration issue of the occupant protection system
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code active?
It's moderate severity, so while you can drive, be aware that the airbag system may not function properly, putting passengers at risk in a collision.
Will this code come back after clearing?
Yes, if there’s an underlying issue like a bad sensor or wiring, the code is likely to return.
Why does this code sometimes pair with other B-codes?
This code deals with the occupant detection system, which may be linked to other systems and sensors that monitor passenger safety.
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