Seatbelt Passenger Pretensioner Circuit Short to Battery
The passenger seatbelt pretensioner circuit is shorted directly to battery power, like a wire touching the positive terminal when it shouldn't. The airbag control module detects this electrical fault and stores the code.
The airbag control module monitors the voltage and resistance of the passenger pretensioner circuit. It expects a specific resistance range during normal operation and detects when the circuit shorts directly to battery voltage, causing excessive current draw.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Pretensioner Circuit Voltage | 0V (inactive) or controlled pulse during deployment | Continuous battery voltage (12V+) detected abnormally |
| Circuit Resistance | Varies by design (typically ohms range) | Near zero ohms indicating direct short to battery |
Code B1882 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, B1882 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.