P0B28 OBD-II: Hybrid Battery "B" Voltage Unstable

P0B28 Severity

Urgent

Should you fix P0B28 yourself?

Identifying an OBD code is just the start of a complete diagnostic routine. Most trouble codes are caused by a sensor reporting a value that is out of range. Just replacing a sensor may not fix underlying issues. Be sure to understand the code, the part or system in your car that the code refers to, and the risks of delaying professional repair.

Proper diagnosis will save you time and money on unnecessary repairs.

Urgent codes indicate immediate action is necessary. These are urgent and significant malfunctions that can cause severe damage to the vehicle or harm the driver and passengers.

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P0B28 Summary Find a Repair Shop P0B28 Details Ask RepairPal CarGenius Other OBD-II Codes

What causes OBD-II fault code P0B28?

The high voltage battery is composed of many individual battery cells. The Battery Energy Control Module (BECM) monitors all the cells in the high voltage battery pack to make sure they are all contributing equally to the high voltage system. If one cell is determined to be unequally contributing, code P0B28 will be set.

OBD II Fault Code

OBD II P0B28

OBD-II Code High voltage system may not operate is defined as a Hybrid Battery "B" Voltage Unstable

High voltage system may not operate Symptoms

High voltage system may not operate

Common Problems That Trigger the P0B28 Code

Battery Energy Control Module (BECM) failure
High voltage battery assembly failure
Wiring issue

OBD Code Resources

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OBD II Fault Code

OBD II P0B28

OBD-II Code High voltage system may not operate is defined as a Hybrid Battery "B" Voltage Unstable

High voltage system may not operate Symptoms

High voltage system may not operate

Common Problems That Trigger the P0B28 Code

Battery Energy Control Module (BECM) failure
High voltage battery assembly failure
Wiring issue

P0B28 OBD-II: Hybrid Battery "B" Voltage Unstable

Should you fix P0B28 yourself?

What causes OBD-II fault code P0B28?

Need a P0B28 diagnosis? Trust our experts.

OBD II Fault Code

High voltage system may not operate Symptoms

Common Problems That Trigger the P0B28 Code

OBD Code Resources

Ask our experts about P0B28.

Other OBD-II Codes

OBD II Fault Code

High voltage system may not operate Symptoms

Common Problems That Trigger the P0B28 Code