Occupant Classification Sensor Fault
This code indicates a problem with the occupant classification system.
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 car's system can't properly detect if there's a passenger in the seat or not, which affects airbag deployment.
What the computer is actually seeing
The airbag control module isn't getting the correct voltage or signal from the occupant classification sensor, which normally should indicate if there’s weight on the seat or not, typically around 0.5 to 5 volts depending on sensor status.
What a healthy reading looks like
Expect signal voltages between 0.5V (no weight) to 4.5V (weight detected).
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.
- 1Check for any visible damage to the wiring and connectors leading to the occupant classification sensor. If damaged, repair or replace as needed. Decide if repair helped.
- 2Using a multimeter, check the voltage output of the occupant classification sensor while someone is sitting in the seat. Should read 0.5V without weight and up to 4.5V with weight. If readings are outside this range, the sensor is faulty, replace it.
- 3Scan the vehicle's computer for additional codes. If other codes are present, address those first, then retest the B1492 code. If the code persists and no other codes are found, consider replacing the airbag control module.
Common causes
- Faulty occupant classification sensor
- Damaged wiring or connectors to the sensor
- Faulty airbag control module
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code present?
It’s generally safe to drive, but you won’t have full airbag protection for the passenger seat until you fix this issue.
Will this code come back after I fix it?
If the issue is resolved and the wiring/sensor replaced, the code should clear and not return.
Why does this code show up with other codes?
The occupant classification sensor is often linked to the airbag system, so if there's another issue with the airbag system, it may trigger multiple related codes.
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