Powertrain, generic (extended)

P2E86 Battery Charger B Input Voltage Sensor Circuit High

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P2E86 flags an input voltage signal of charger B above the highest value the measurement can plausibly produce. Home sockets and AC stations stay far below that, so the fault normally lies in the sensing path or its signal line, rarely in the grid. No manufacturer documents P2E86 publicly. The charger A versions give the scale: GM's 2011 Volt treats an AC peak above 422 V for 160 of 200 ms as sensor high (Type A, MIL), and Mitsubishi's Outlander PHEV sets P0D40 when the sensor output passes 3.161 V, equal to more than 492 V, for 0.5 s, then halts charging and names the charger/DC-DC unit as the part to replace. CARB wants hybrid monitoring plans to cover charging system performance. Too low is P2E85, plausibility P2E84. AC charging usually stays blocked.

Likely causes

Voltage sensing circuit inside charger B faulty
Sensor signal line shorted to a supply voltage
Lost reference ground of the measurement

Symptoms

  • AC charging refused or ended immediately
  • Charging system warning in the cluster
  • Fault returns at once after clearing, even on a known good charger

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–3,000
Time0.5–4 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

battery charger b input voltage sensorwiring harnesson board charger

Related codes

P0E8BP2E84P2E85P0D40P0E87

References: law.cornell.edu, gsi.ext.gm.com, mitsubishitechinfo.com.