Passenger Seat Occupant Detection Circuit Open
The car's occupancy sensor for the passenger seat has lost electrical connection, like a phone with a loose battery contact. The system can't detect whether someone is sitting there, which affects airbag deployment and safety features.
The ECU monitors the resistance and voltage signal from the passenger seat occupancy sensor (typically a pressure or weight-sensing mat). It expects a continuous circuit with specific resistance values when the seat is occupied versus empty. An open circuit means zero continuity, preventing the ECU from reading seat status.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Sensor Signal Voltage | 0.5–4.5V (varies with seat load) | Out of range or no signal detected |
| Circuit Resistance | 500–2000 ohms (varies by design) | Open circuit (infinite resistance) |
Code B2582 is a low-severity fault. Your vehicle is generally safe to drive to a workshop for diagnosis. However, do not ignore it indefinitely — low-severity codes often indicate developing problems that become expensive if neglected. Book a diagnostic appointment within 2–4 weeks. If you notice any additional symptoms (rough running, power loss, unusual smells), treat it as higher priority.
Once the fault is repaired, B2582 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.
The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.