Code Definition

B1671 — Battery Module Voltage Out Of Range

System: Body  |  Type: Manufacturer-Specific  |  Make: Generic

About B1671

B1671 is a manufacturer-specific body diagnostic trouble code. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B1671 is stored, the module has detected a plausibility fault — the measured value is in the electrical range but is not consistent with expected operating behaviour.

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.

B1671 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The Battery Energy Control Module (BECM), or hybrid battery management system, monitors the high voltage battery pack and the individual battery modules within it. DTC B1671 is set when the voltage of one or more battery modules falls outside the manufacturer's acceptable operating range, either too high or too low. This monitoring is essential for safe operation of the hybrid or electric drive system, where unbalanced or out of range modules can cause reduced performance, charging issues, or thermal events. When this code is set, the vehicle may exhibit reduced hybrid system performance, rest...

Join TaT to view the complete code information and diagnostic details.

Quick Facts