What Does P0B82 Mean?
DTC P0B82 indicates that the hybrid battery voltage sense circuit for cell group "O" is reporting values outside the expected operating range or is not performing within specification. The BMS sees voltage readings from group O that are electrically valid but do not align with what is expected based on pack SOC, temperature, and load. This range/performance deviation is frequently an early indicator of cell aging or a developing high-resistance connection.
Common Causes
30%
Cell imbalance within group O causing voltage deviation from pack average
25%
High-resistance connection at the voltage sense connector or cell tap
20%
Aging cells in group O with altered voltage-SOC relationship
15%
BMS calibration drift or reference voltage error on the O sensing channel
10%
Temperature sensor error affecting the expected voltage window for group O
Diagnostic Steps
1
Compare cell group O voltage from freeze frame data against all other cell groups under identical conditions to measure the deviation.
2
Execute manufacturer battery health/balance diagnostic to assess group O deviation from pack average through a full charge/discharge cycle.
3
Clean and inspect cell group O voltage sense connector. Measure contact resistance at each terminal pin.
4
Measure individual cell voltages within group O at open-circuit rest and under load to characterize cell health.
5
Verify the temperature sensor in the group O region reads accurately, as temperature errors affect the expected voltage range calculations.
6
If all hardware tests pass, perform BMS recalibration or apply available manufacturer software updates.
Estimated Repair Cost
$150 - $3,000
Parts + labor, varies by vehicle and location
DTC P0B82 indicates that the hybrid battery voltage sense circuit for cell group "O" is reporting values outside the expected operating range or is not performing within specification. The BMS sees voltage readings from group O that are electrically valid but do not align with what is expected based...
The most common cause of P0B82 (Hybrid Battery Voltage Sense "O" Circuit Range/Performance) is: Cell imbalance within group O causing voltage deviation from pack average
Typical repair costs for P0B82 range from $150 to $3,000, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Range/performance deviations lead to suboptimal cell balancing, progressively widening the voltage spread across cell groups. This accelerates capacity fade in the weakest groups and can eventually trigger more severe fault codes. Hybrid performance may be reduced as a precaution.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0B82 to identify the root cause.
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Quick Info
Category
Powertrain
System
Hybrid/EV Battery System
Difficulty
Type
Generic (SAE)
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