Seat Occupancy Sensor Fault
There's a problem with the seat occupancy sensor 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 seat occupancy sensor detects if someone is sitting in the seat. If it stops working, the computer won't know if the safety features are needed, which could mean the airbags might not deploy properly in a crash.
What the computer is actually seeing
The computer monitors the voltage signal from the seat occupancy sensor. A voltage level below 0.5V or above 4.5V indicates a fault condition or an open circuit in the sensor circuit.
What a healthy reading looks like
Voltage should be between 0.5V and 4.5V when the seat is occupied. Resistance of the sensor should be within manufacturer specifications, usually around 1-3k ohms when properly functioning.
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 for the seat occupancy sensor. Look for frays, corrosion, or loose connections. Decision: If damaged, repair or replace and retest. If good, proceed to step 2.
- 22. Measure the voltage at the seat occupancy sensor connector with the seat occupied. You should see between 0.5V and 4.5V. Decision: If voltage is outside this range, sensor is likely bad. If within range, proceed to step 3.
- 33. Check the resistance of the seat occupancy sensor with a multimeter. It should be around 1-3k ohms. Decision: If resistance is out of spec, replace the sensor. If it’s within spec, further diagnosis of the airbag module or related systems may be required.
Common causes
- Wiring issues (frayed, broken, or chafed wires)
- Faulty seat occupancy sensor
- Bad connector or loose connection at the seat or ECM
- Seat replaced or moved without recalibrating sensor
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code active?
Yes, it's drivable, but the airbag system may not work properly in a crash, so it's best to fix it soon.
Will the code come back after clearing?
If the issue isn't fixed, the code will likely return after a short time.
Why does this code pair with other codes?
This code often appears with other faults related to seat sensors or the airbag system, indicating a common underlying issue.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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