Powertrain, generic (extended)

P2D5D Battery Charging System Positive Contactor C Stuck Open

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P2D5D means positive charging contactor C stays open although it was commanded closed, so the plus pole of that charging path never connects and the session fails right at the start. No manufacturer documents P2D5D publicly; Mazda, which lists the non-closing case for contactor B (P2BC6), says nothing about a C contactor. GM's comparable check for the Volt's plus contactor A (P0D09) illustrates detection: while the charger precharges, its terminal voltage ought to climb; if 8 of 9 readings, spaced 12.5 ms apart, remain under 10 V, the contactor counts as stuck open (Type A). CARB requires plug-in hybrids to detect charger faults that prevent charging. Suspects are burnt contacts, a weak coil feed and a jammed armature. Welding is P2D5C, the minus side P2D64.

Likely causes

Contactor C does not pull in (burnt contacts, jammed armature)
Insufficient coil supply due to wiring or connector resistance
Control software misjudges the precharge voltage

Symptoms

  • Charging in the affected mode does not start
  • Charging station reports an aborted session
  • Driving not affected

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€150–4,000
Time1–10 h

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

Parts involved

bcs pos contactor cwiring harnessbms

Related codes

P2D5BP2D5CP2D5EP2D64P2BC6P0D09

References: gsi.ext.gm.com, law.cornell.edu, static.nhtsa.gov.