P0B6DHybrid/EV Battery Voltage Sense K Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0B6D marks an open circuit on voltage sense K, the eleventh cell measuring channel. GM has used the code since its first published hybrid tables: in 2011 the open-line test already checked bus bar voltages, flagging more than 0.7 V. The 2019 battery energy control module refines it into seven cases, among them adjacent cells 1.3 V apart, a cell under 36 mV with balancing active and splice voltages over 0.1 V, all judged in a 0.6 s window and set as Type A. Ford counts P0B6D among the open sense line codes that leave a 2019-2020 Fusion plug-in hybrid unable to start and fixes it by replacing the traction battery. Before any pack work, the high-voltage system has to be disabled by trained staff.
- What you may notice
- Vehicle not ready to drive
- Hybrid or EV system warning with MIL
- Charging not possible
- Likely causes
- LikelyLoose or corroded bus bar connection at the channel K tap
- PossibleInternal traction battery fault, pack replacement (Ford Fusion PHEV)
- PossibleBroken sense wire between cells and monitoring 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: €80 – €8,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.