P2E84Battery Charger B Input Voltage Sensor Circuit Range/Performance
- Generic OBD-II code · Powertrain
- How the car detects it
- P2E84 questions the plausibility of the grid voltage that charger B reads at its input: the sensor answers within its electrical limits, yet the figure does not suit the moment, such as a voltage with no supply connected or a value that contradicts other readings. No manufacturer documents P2E84 publicly. How such a check works is shown on charger A: GM's 2011 Volt compares the AC peak voltage with two internal bulk voltages and fails when both differ by more than 34 V (Type A), while Mitsubishi's Outlander PHEV reacts to 25 V or more held for 2 s. On the Polestar 3, whose AC charger reports as charger B, input sensor faults appear as P0E8B16 and lead to replacement of the unit if DC charging still works. Hard low or high readings are P2E85/P2E86. AC charging is usually refused.
- What you may notice
- AC charging does not start or stops after a short time
- DC fast charging still works normally
- Charging fault message in the instrument cluster or app
- Likely causes
- LikelyVoltage sensing inside charger B drifting or faulty
- PossibleCorroded or loose AC contacts between charge inlet and charger B
- PossibleUnstable or unusual supply from the charging station or house circuit
- RareCharger software misjudging the reading
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €3,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.