OBD-II code · Powertrain (generic)
P0DC9 Hybrid/EV Battery Cell Balancing Circuit H Stuck On
The cell balancing circuit H reports a stuck on condition. Cell-group voltage equalization may be impaired on this channel.
Is it safe to drive with P0DC9?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyBalancing transistor stuck on
- PossibleDriver IC failure
- Less likelyCarbon or debris buildup preventing free movement
Symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 3–10 h
- Emissions test
- Usually unaffected
- Parts involved
- Hv Battery Cell Balancing Circuit H, Bms
Related codes
- P0DB1Hybrid/EV Battery Cell Balancing Circuit B Stuck On
- P0DB5Hybrid/EV Battery Cell Balancing Circuit C Stuck On
- P0DB9Hybrid/EV Battery Cell Balancing Circuit D Stuck On
- P0DBDHybrid/EV Battery Cell Balancing Circuit E Stuck On
- P0DC1Hybrid/EV Battery Cell Balancing Circuit F Stuck On
- P0DC5Hybrid/EV Battery Cell Balancing Circuit G Stuck On
- P0DCDHybrid/EV Battery Cell Balancing Circuit I Stuck On
- P0DD1Hybrid/EV Battery Cell Balancing Circuit J Stuck On
- P0DD5Hybrid/EV Battery Cell Balancing Circuit K Stuck On
- P0DD9Hybrid/EV Battery Cell Balancing Circuit L Stuck On
- P0DDDHybrid/EV Battery Cell Balancing Circuit M Stuck On
- P0DE1Hybrid/EV Battery Cell Balancing Circuit N Stuck On
- P0DC6Hybrid/EV Battery Cell Balancing Circuit G Stuck Off
- P0DC7Hybrid/EV Battery Cell Balancing Circuit G Range/Performance
- P0DC8Hybrid/EV Battery Cell Balancing Circuit H
- P0DCAHybrid/EV Battery Cell Balancing Circuit H Stuck Off
- P0DCBHybrid/EV Battery Cell Balancing Circuit H Range/Performance
- P0DCCHybrid/EV Battery Cell Balancing Circuit I
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.