P0B6EHybrid/EV Battery Voltage Sense K 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
- In a nickel-metal hydride pack with 20 equal blocks, twenty times one block voltage should roughly equal the whole pack voltage. GM's 2012 two-mode hybrids use exactly this for P0B6E, assigned to block 11: the battery pack control module checks blocks 11 and 12, and if both scaled values deviate from the pack voltage sensor by more than 70 V in 160 of 170 samples, the code is set, Type B. The test only runs with the contactors closed for over 200 ms and no pack voltage fault active. GM's lithium-ion controllers judge channel K differently, as a frozen value that fails to follow the average cell voltage (35 of 40 samples, Type A, in the 2019 tables). No other manufacturer publishes it.
- What you may notice
- MIL after two trips
- Less electric assist, more engine running
- Likely causes
- LikelyBlock or cell voltage measurement of channel K out of calibration
- PossiblePack voltage sensor reading off, distorting the comparison
- RareMeasuring input stuck at one value
- 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: €100 – €5,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.