P2CD1Hybrid/EV Battery Pack L Deterioration
- 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
- P2CD1 marks section L, the twelfth subdivision of the high-voltage pack, as worn: its usable capacity or power capability has fallen below what the controller accepts. The code only makes sense for packs whose management tracks twelve or more groups individually; no carmaker documents it publicly, and the largest published series, Audi's Q5 PHEV, ends with group 8. The Californian requirement that storage faults pinpoint the smallest replaceable unit explains why separate codes exist up to N. In the workshop, cell voltages of section L are compared with the rest both at rest and under load, and a balancing problem or a sensing fault (P0BBD, voltage variation) is excluded before a module is replaced. Overheating of this section is the separate code P2D50.
- What you may notice
- MIL illuminated
- Battery charge falls faster than usual
- Likely causes
- LikelySection L has reached the end of its usable life
- PossibleOne weak cell block pulling the whole section down
- RareFaulty voltage sensing making section L look weaker than it is
- 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: €400 – €6,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.