Driver Side Crash Sensor Internal Fault
The driver side crash sensor has an internal electrical problem and can't properly detect collisions. Think of it like a smoke detector with a broken circuit—it won't sound the alarm when needed.
The ECU monitors the driver side crash sensor's signal integrity, resistance values, and response timing during self-diagnostics. It expects stable voltage levels and proper sensor impedance within defined ranges. Any deviation from expected sensor behavior triggers this internal fault code.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Sensor Signal Voltage | 4.5–5.5 V | Below 4.5 V or above 5.5 V |
| Sensor Impedance | 1–10 kΩ | Open circuit or short to ground |
Code B2444 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, B2444 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.