P0B55Hybrid/EV Battery Voltage Sense F Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0B55 is the plausibility code of cell channel F: the signal exists and lies inside its range, yet it does not move like the rest of the pack. On the 2016 Chevrolet Volt the vehicle integration control module checks whether channel F moves in the same direction as the average cell voltage, failing it after 7 seconds in an 8 second window, Type A; GM's 2019 tables use 35 failures in 40 samples of 100 ms. The 2012 two-mode hybrids compare block 6, times 20, with the pack voltage and allow 70 V. Chrysler labels it Voltage Sense 6 Circuit Performance on the 2020 Pacifica PHEV, the highest channel in that bulletin, and resolves it with BPCM software.
- What you may notice
- MIL with otherwise normal driving
- Reduced hybrid or electric performance
- Likely causes
- PossibleBattery controller software, fixed by update (Chrysler Pacifica PHEV)
- PossibleChannel F measuring input stuck or slow to respond
- RareIncreased resistance in the channel F tap or connector
- 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: €50 – €6,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.