EV Battery Pack Temperature Fault
Your EV's battery pack temperature sensor isn't reading correctly, like a thermometer that's broken and giving false readings. The vehicle can't properly manage battery heating or cooling, which could damage the battery or reduce performance.
The ECU monitors battery pack temperature via thermal sensors embedded in or near the battery module. It compares actual temperature readings against safe operating thresholds to prevent overcharging, over-discharging, or thermal runaway. If readings fall outside expected ranges or sensors disconnect, a fault is triggered.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Battery Pack Temperature | -20°C to +60°C | Below -20°C or above +60°C, or sensor disconnected |
| Sensor Signal Voltage | 0.5V to 4.5V | Below 0.2V or above 4.8V (open/short circuit) |
Code B2247 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, B2247 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.