Air Bag Crash Sensor #1 Feed/Return Circuit Open
The airbag system's crash sensor #1 wiring circuit is broken or disconnected, preventing the sensor from sending signals to deploy the airbag during a collision. Think of it like a smoke detector with a disconnected battery—the sensor itself might work fine, but the system can't receive its warning signal.
The airbag module monitors the voltage and continuity of the crash sensor #1 feed and return circuits. During normal operation, the sensor should report a valid analog or digital signal within expected voltage ranges. When the circuit is open, the ECU detects no signal return, triggering the fault code.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Sensor Signal Voltage | 0.5V - 4.5V (depending on sensor type) | No signal or voltage out of range |
| Circuit Continuity Resistance | < 5 ohms (complete circuit) | > 5 ohms (open circuit detected) |
Code B1941 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, B1941 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.