P0B22Hybrid/EV Battery Pack Voltage Sense D Circuit Intermittent/Erratic
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P0B22 completes the voltage sense D series and reports an intermittent or erratic pack voltage measurement D: the reading jumps, drops out briefly or changes implausibly fast, then recovers. Current code lists title it this way; the older label Generator Phase U Current Sensor Circuit does not belong to this number. No manufacturer documents P0B22 publicly; GM's published tables only cover channel A (P0ABB to P0ABD). CARB requires circuit monitoring of battery voltage sensors in hybrid storage systems. Steady faults of channel D are P0B1E to P0B21, the same fault type on channels B and C is P0B18 and P0B1D. Loose terminals or chafed sense leads are typical, so the warning comes and goes.
- What you may notice
- Warning comes and goes, often stored as history
- Battery power limited, reduced electric drive or assist
- Vehicle may not reach Ready or may shut down the high-voltage system
- Likely causes
- LikelyLoose or corroded sense connector or terminal
- PossibleChafed sense lead with intermittent contact
- RareController software misinterprets transients
- 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: €100 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.