P2E85Battery Charger B Input Voltage Sensor Circuit Low
- Generic OBD-II code · Powertrain
- How the car detects it
- P2E85 means the input voltage signal of charger B sits too low, so the car sees little or no grid voltage while it expects AC. GM uses the code on its battery-electric models, from the 2017 Bolt EV to the Lyriq, Hummer EV, Blazer, Equinox and Silverado EV and BrightDrop vans, under the wording input voltage sensor circuit low voltage. Bulletin PIT6353 and TechLink March 2025 name a typical trigger: a DC-only NACS adapter used at a household outlet or AC wallbox, which routes the shared pins to the DC contacts, so no AC reaches the charger; P0D3F, P0F71 and on the Bolt P1EE6 may set with it. A 2026 TechLink lists P0E8B-11 beside it. With the right adapter the fault is gone; otherwise check inlet, wiring and the charger. Too high is P2E86.
- What you may notice
- Vehicle does not charge on a Level 1 or Level 2 AC charger
- DC fast charging works without the adapter problem
- Further charger codes such as P0D3F or P0F71 stored
- Likely causes
- LikelyDC-only NACS adapter used on an AC charger
- PossibleCharging station or house circuit not delivering AC voltage
- PossibleOpen or high-resistance AC path between inlet and charger B
- RareSensing circuit inside charger B shorted to ground
- Repair
- Medium · Often possible to do yourself.Typical cost: €0 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.