P0B7FHybrid/EV Battery Voltage Sense N Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Channel N reporting more voltage than a cell can hold leads to P0B7F. GM uses three thresholds depending on the system: 4.8 V or more for 1.4 s in 2 s on most lithium-ion battery controllers, above 4.90 V in 14 of 18 samples on the 2016 program with a separate sense module, both Type A, and above 4.65 V in 7 of 10 samples on the BAS Plus mild hybrid, Type B. The 2012 two-mode trucks treat N as NiMH block 14 and set the code above 23 V in 15 of 20 samples, Type B. The low counterpart is P0B7E, an open lead is P0B7C. Before suspecting the cell, a technician checks whether the N lead touches a neighbouring higher potential or whether the measuring input has drifted.
- What you may notice
- MIL and warning in the instrument cluster
- Regenerative braking and charging limited
- Likely causes
- LikelySense lead N touching a higher potential
- PossibleDrifted measuring input in the battery controller
- RareReal overvoltage of the cell on channel N
- 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 – €6,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.