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OBD II Fault Code

  • OBD II P0B1A

OBD-II Code Diagonostic Trouble Code is defined as a Hybrid Battery Pack Voltage Sense "C" Circuit Range/Performance

The hybrid battery pack is composed of many individual battery cells (sometimes over 300 cells). Those cells are then grouped together. each group has a voltage monitor attached to it that tells the battery control module (or hybrid powertrain control module) the available voltage for each cell group. If a cell group's voltage is less than what it should be, code P0ABA is set.

Common Problems That Trigger the P0B1A Code

  • Battery contactor assembly failure
  • Battery Energy Control Module (BECM) failure
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