P2E6CHybrid/EV Battery Pack A Cell Thickness
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2E6C means the cells of high-voltage pack A have become thicker than the battery controller tolerates: the cells are swelling. A healthy cell only breathes a little while charging; GE and University of Michigan measured about 0.1 mm, 1 % of its thickness, on the Sanyo cell of Ford's Fusion HEV pack. Lasting growth comes from aging or from gas after overcharge or overheating. No manufacturer documents P2E6C publicly. Kia shows a comparable guard: on the 2017 Niro hybrid a switch on the pack closes when cells bulge after overcharge, and the BMS then opens the main relays (P1BA7). A Ford patent likewise lets the BECM reduce current or open contactors when cell pressure is too high. Expect power limits or no READY; P2E6D to P2E6F are faults of the sensor itself.
- What you may notice
- Hybrid or EV system warning, often with reduced power
- Vehicle may not switch to READY because the main contactors stay open
- Charging blocked or limited
- Likely causes
- LikelyAged cells in pack A that have grown permanently thicker
- PossibleGas build-up in cells after overcharging or overheating
- RareModule clamping or end plates loosened, so cells can expand further
- 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: €600 – €9,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.