P0DCCHybrid/EV Battery Cell Balancing Circuit I
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0DCC concerns the hardware of balancing circuit I, the ninth group, so only packs split into at least nine balancing channels can raise it. No maker publishes this exact code: Ford's hybrid summaries assign letter I only to the stuck codes P0DCD and P0DCE, and Audi's A3 e-tron bulletin stops at H. How an electrical fault of such a channel can be caught is shown in Renesas patent US9735567B2: a pull-up resistor lifts the balancing terminal to cell potential when the switch fails to close, so commanding it on and still seeing the full cell voltage exposes an open path. Broken leads, corroded connectors or a faulty monitoring chip are the usual suspects. California's regulation demands monitoring of such parts on hybrids. Related: P0DCD to P0DCF.
- What you may notice
- Hybrid battery warning with check engine light
- Electric drive or charging limited by the battery controller
- Likely causes
- LikelyBroken balancing or sense lead of group I
- PossibleCorroded connector between cell group I and its monitoring board
- RareDefective monitoring chip for channel I
- 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: €200 – €4,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.