Code Definition

B2247 — EV Battery Pack Temperature Fault

System: Body  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About B2247

B2247 is a generic (obd-ii standard) body diagnostic trouble code. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

Because B2247 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The Battery Management System (BMS) monitors the temperature of the high voltage battery pack using multiple temperature sensors distributed across the battery modules. DTC B2247 sets when the BMS detects an out of range temperature reading, an implausible difference between sensors, or a sensor circuit fault that prevents accurate pack temperature monitoring. Pack temperature is critical to safe operation because lithium ion cells can suffer thermal runaway if operated outside their design temperature window, and the BMS uses the temperature data to enable or disable charging, regulate the co...

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