P0B50Hybrid/EV Battery Voltage Sense E 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
- On the 2020 Chrysler Pacifica plug-in hybrid P0B50 is called Voltage Sense 5 Circuit Performance and rarely comes alone: the FCA bulletin lists it with the other sense channels, contactor stuck codes, a long precharge time and wake-up circuit faults, all cured by updating the battery pack control module. Some owners also notice that scheduled charging fails because the pack does not wake up. GM defines the check precisely: channel E must change in step with the average cell voltage, and a stuck reading in 35 of 40 samples sets the code, Type A; the 2012 two-mode hybrids instead flag block 5 when 20 times its value differs from the pack voltage by over 70 V. Open, low and high faults are separate codes.
- What you may notice
- MIL on
- Scheduled charging does not start
- Premature oil change or fuel refresh message (Pacifica)
- Likely causes
- LikelyBattery pack control module software, fixed by reflash (Chrysler Pacifica PHEV)
- PossibleChannel E reading frozen in the measuring chip
- RareBlock voltage measurement drifting from pack voltage (GM two-mode)
- 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.