P0C6FHybrid/EV Battery Temperature Sensor B/C Correlation
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P0C6F sets when battery temperature sensors B and C disagree by more than the calibrated margin. Sensor B also takes part in the A/B check (P0C6E), so the pattern of stored codes helps: if P0C6E and P0C6F appear together, B is the shared suspect, while P0C6F alone points more towards C. No manufacturer documents P0C6F publicly. A Toyota patent describes a second way to catch such faults while the pack is working: if the spread between sensors is large during charging or discharging and one output barely moves, that sensor is treated as frozen. GM files the physical fault per sensor; on the eAssist, sensor 3 is P0ACB with 8.55 °C after six hours off. A real local hot spot inside a module can also open the gap.
- What you may notice
- Hybrid or EV system warning
- Power or charging rate limited
- Displayed battery temperatures differ noticeably in live data
- Likely causes
- LikelySensor C reading off, especially when P0C6F is stored alone
- PossibleSensor B reading off, likely when P0C6E is stored as well
- PossibleSensor output stuck at one value while the pack temperature changes
- RareReal local heating in a module, for example from a cell with high resistance
- 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 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.