Powertrain, generic

P0E6D Battery Charging System Precharge Contactor Control Circuit/Open

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P0E6D concerns the low-voltage side of the charging precharge contactor: the coil circuit through which the control unit switches it, typically interrupted. Unlike P0E6C, which judges what happens on the high-voltage side, this code comes from the driver output itself. No manufacturer documents P0E6D publicly. GM uses the same method on the positive charging contactor of its 2019 hybrids (P0D0A): an open is recognised when the switched-off output still shows more than 4 V, or when less than 194 mA flows with the output on; 40 failed samples out of 50 at 12.5 ms set a Type B code. Mitsubishi's i-MiEV compares a coil monitor with the command and stores P0AE6 for the charging contactor. Range, low and high faults of the coil circuit are P0E6E to P0E70.

Likely causes

Broken coil control wire or unplugged connector
Open winding in the contactor coil
Failed driver stage in the battery management unit

Symptoms

  • Charging cannot be started
  • High-voltage system fault message

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€150–1,500
Time1–4 h

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

Parts involved

precharge contactorwiring harnessbms

Related codes

P0E6EP0E6FP0E70P0D0AP0AE4

References: gsi.ext.gm.com, static.nhtsa.gov.