P2E6FHybrid/EV Battery Pack A Cell Thickness Sensor Circuit Performance
- 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
- P2E6F covers a thickness sensor in pack A whose reading is electrically valid but does not behave as the controller expects. Cell thickness is not static: it rises and falls with state of charge, which is why Bosch and Samsung SDI propose using the swelling force of the winding to estimate charge and health, and a graphene film sensor studied at Warwick tracked charge level from expansion alone. A sensor that stays frozen while the pack is charged and discharged, or drifts against that pattern, is therefore suspect. Nebraska and Oak Ridge researchers found that expansion also depends on current, charge voltage and clamping force, so limits must be wide. No manufacturer documents P2E6F publicly. CARB asks for such rationality checks where feasible.
- What you may notice
- Warning light without noticeable driving change at first
- Charging or power may be restricted later
- Likely causes
- LikelySensor loosened, shifted or no longer bonded to the cell or end plate
- PossibleSensor drifting with age or temperature
- PossibleContact resistance in connectors distorting the reading
- RareMissing calibration or relearn after module replacement
- 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: €150 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.