P2E85 code meaning
Battery Charger B Input Voltage Sensor Circuit Low
What P2E85 means
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.
P2E85 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.2 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2E85
- 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
Common causes of P2E85
- Most 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
- Less likelySensing circuit inside charger B shorted to ground
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Battery charger b input voltage sensorWiring harnessOn board charger
What each part of P2E85 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 85 | The exact fault in that area. |
What to do next
- Note P2E85 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2E85
What does P2E85 mean?
P2E85 means "Battery Charger B Input Voltage Sensor Circuit Low". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P2E85?
P2E85 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P2E85 fail an emissions test?
P2E85 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P2E85 to fix?
Difficulty: medium. A typical repair takes 0.2 to 3 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2E85 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.