P0B82Hybrid/EV Battery Voltage Sense O Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0B82 is a plausibility verdict on channel O. GM's 2016 program with a battery sense module asks cell O to trend at least 0.002 V in the direction of the average whenever the average moves by more than 0.022 V; 35 failed evaluations out of 40 set a Type A code. The 2019 controllers use the same logic with 0.005 V. Where O is NiMH block 15, on the 2012 two-mode hybrids, the battery pack control module multiplies blocks 15 and 16 by twenty and compares the result with the pack voltage, failing beyond 70 V in 160 of 170 samples, Type B. The BAS Plus mild hybrid needs half the average movement, 20 of 40, Type B. Low, high and open faults on the same channel are reported separately as P0B83, P0B84 and P0B81.
- What you may notice
- MIL with otherwise normal driving
- State of charge display jumps or is inaccurate
- Likely causes
- LikelyChannel O reading frozen in the monitoring electronics
- PossibleBattery controller software fault
- RareRising resistance in the O sense tap distorting the reading
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €80 – €5,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.