P0DC5Hybrid/EV Battery Cell Balancing Circuit G Stuck On
- 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
- P0DC5 reports that the bleed switch of group G seems to stay closed. Ford lists the code for the BECM of its 2018 hybrids and plug-ins; there, a sticking circuit is inferred at start-up, with contactors open, from any of its six cells straying more than 75 mV from the pack average. A more direct test can sit in the monitoring chip. Renesas patent US9735567B2 gives each balancing terminal a comparator plus a pull-up: with the switch commanded off, the measured cell voltage should come through, and a reading near zero reveals a switch stuck in conduction. Untreated, group G keeps losing charge while parked and can end up triggering low-cell warnings. CARB lets makers watch the switches instead of every cell voltage. Circuit fault: P0DC4, inactive: P0DC6.
- What you may notice
- Check engine light and hybrid battery warning
- Low cell voltage codes may follow after longer parking
- Electric range decreasing from day to day
- Likely causes
- LikelyBalancing switch of group G stuck in conduction
- PossibleEnable signal from the controller or chip never withdrawn
- RareMoisture or contamination forming a leakage path on the module board
- 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: €300 – €4,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.