Powertrain, generic

P0E63 Battery Charger A Enable Circuit High

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P0E63 is the high-level counterpart: the enable signal to charger A sits above the level its commanded state allows, for instance because it touches a 12 V feed. In practice the charger may then be woken although no charging is requested, which can drain the 12 V battery while parked, or it may ignore a switch-off command. No manufacturer documents P0E63 publicly. GM documents only the generic enable fault P0E61 for the 2016 Volt (VICM) and in the 2019 hybrid tables (HPC2), evaluated via a hardware fault flag with 30 failures in 40 samples as Type B; separate low and high codes are not listed there. CARB counts any charger fault that disturbs charging as one a plug-in hybrid must detect. A wire chafed against a powered harness or an internal short in the charger are the usual suspects.

Likely causes

Enable wire shorted to a 12 V supply
Enable input of the charger faulty
Driver stage in the commanding module stuck on

Symptoms

  • 12 V battery drained while parked
  • Charger active or charging not ending as expected
  • Charging system warning

Repair estimate

DifficultyHardWorkshop job
Parts and labour€60–2,500
Time0.5–4 h

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

Parts involved

battery charger a enable circuitwiring harnesson board charger

Related codes

P0E61P0E62P0E64P2E37

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