P0DD4Hybrid/EV Battery Cell Balancing Circuit K
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0DD4 is the electrical fault code for balancing circuit K, the eleventh group, so it only exists on packs with at least eleven balancing channels. Public maker documents for this exact code were not found; Ford's summaries give K only to the stuck faults P0DD5 and P0DD6. How a monitoring chip catches broken wiring is shown in Infineon's TLE9012DQU data sheet: during its round-robin cycle the chip sinks a test current of about 15 mA into each balancing pin, odd channels in one cycle and even ones in the next, and flags a broken wire or missing load when the resulting change in cell voltage falls outside a set window. CARB 13 CCR 1968.2 requires such components to be monitored on hybrids. Related: P0DD5 to P0DD7.
- What you may notice
- Check engine light and hybrid system warning
- Missing or implausible cell voltages for group K in the scan tool
- Reduced charging or drive power
- Likely causes
- LikelyOpen wire or loose cell tap in group K
- PossibleCorrosion or moisture at the connector of the monitoring board for K
- RareDefective monitoring chip or external balancing part of channel K
- 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.