P0B68Hybrid/EV Battery Voltage Sense J 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
- For owners of a 2019 or 2020 Ford Fusion plug-in hybrid, P0B68 is best known from bulletin 23-2039: the car will not start, the battery energy control module stores one or more open sense line codes from P0B3B to P0B7C, and the prescribed repair is a complete high-voltage traction battery. Technically the code says that the tenth measuring channel, J, has lost its connection to the cells. GM describes the test in detail for its lithium-ion packs: within 0.6 s it looks for adjacent cells 1.3 V apart, a cell under 36 mV while being balanced, or splice voltages above 0.1 V or 0.5 V, and sets P0B68 as Type A. GM's BAS Plus mild hybrid uses a 1.4 V and 0.5 V rate-of-change test, Type B.
- What you may notice
- No start, vehicle does not become ready
- Hybrid system warning on the cluster
- Plug-in charging unavailable
- Likely causes
- LikelyInternal traction battery failure, pack replacement (Ford Fusion PHEV 2019-2020)
- PossibleOpen sense wire or cell tap on channel J
- RareBad bus bar or splice connection near channel J
- 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: €150 – €8,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.