Powertrain, generic

P0E87 Battery Charger B Input Voltage Too High

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P0E87 flags an input voltage for charger B above what the charger accepts. Ford uses the code in its plug-in hybrid OBD summary (OBDSM1901) in an unusual way: it is part of a plausibility test run on the battery controller (BECM) and judges the charging voltage request that reaches the charger. Once the charger is in its ready state, a requested value above 450 V counts as a fault, and the check needs less than one second. In that reading the code points to a wrong command over the network rather than to the grid, so module software and data on the bus deserve attention first. On other designs a measured overvoltage at the input would set it. Ford lets charger faults request the amber wrench lamp instead of a specific charging message. The low case is P0E86.

Likely causes

Implausible charging voltage request from the battery control module (Ford logic)
Software fault in the charger or battery control module
Real overvoltage from the supply or charging station

Symptoms

  • Charging is refused or ends early
  • Amber wrench lamp in the instrument cluster (Ford)

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€0–1,500
Time0.3–3 h

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

Parts involved

battery charger bac input circuiton board chargerbattery energy control module

Related codes

P0E86P0D28P0E8BP0E89

References: fordservicecontent.com, law.cornell.edu.