P2E6EHybrid/EV Battery Pack A Cell Thickness Sensor Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2E6E is the low-side counterpart to P2E6D: the thickness or swelling sensor of pack A delivers less signal than any intact circuit should, typically from a short to ground, a missing supply or a dead sensor amplifier. No manufacturer documents P2E6E publicly. Two patents show why a low reading can hide a real problem. LG places piezo elements in the cooling gap between cells; they produce a voltage only when expanding cells press on them, which the BMS evaluates. Bosch and Samsung SDI describe a pressure film around the electrode winding whose charge is turned into a voltage by an amplifier fed from the battery. If that output collapses, the controller can no longer see swelling, so it flags the circuit. CARB requires each out-of-range fault of an input to be stored separately.
- What you may notice
- Hybrid or EV warning light
- Reduced power or limited charging
- Likely causes
- LikelySignal wire shorted to ground or to the module housing
- PossibleSensor supply or amplifier supply missing
- PossibleSensing element or its amplifier failed
- RareMoisture or coolant in a connector inside the pack creating a leakage path
- 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.