P0BC6Hybrid/EV Battery Temperature Sensor E Circuit Intermittent/Erratic
- 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
- P0BC6 flags erratic behaviour of battery temperature sensor E: the reading jumps far faster than the heavy battery mass could warm or cool. GM documents the method in its 2016 and 2018 hybrid tables (16OBDG02, 18OBDG02). Sampling every 100 ms, the controller adds up the absolute changes of the sensor value over a 10-sample window; a sum above 10 fails the window, and 4 failed windows out of 5 store the code as Type B, two trips, provided system voltage is above 10.2 V. The same logic covers the other pack sensors. The older Volt, Two-Mode and eAssist tables list no erratic code for sensor E. Typical culprits are a loose terminal, a cracked wire or a connector not fully latched after pack work; if several sensors jump at once, suspect the sensing board.
- What you may notice
- MIL on after two trips
- Sensor E value jumping on the scan tool
- Occasional power reduction
- Likely causes
- LikelyLoose terminal or unlatched connector of sensor E
- PossibleCracked or chafed sensor wire breaking contact intermittently
- RareSensing board fault affecting several temperature inputs
- 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 – €2,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.