Powertrain, generic (extended)

P2D5F Battery Charging System Positive Contactor C Control Circuit Range/Performance

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P2D5F reports that the coil circuit of plus-side charging contactor C is intact yet behaves in a way that does not match the command: the coil current, the voltage on the line or the pull-in delay drift out of their expected band without amounting to a clear open, low or high condition. No manufacturer documents P2D5F publicly, and the published GM tables contain no range test for the coil of any charge contactor. Under CARB, hybrid parts the maker chooses to monitor must show a proper response to commands. A GM patent lists usable measures: rise rate, derivative and integral of the coil current after a short pulse, compared with a reference recorded in advance. Raised resistance in a plug, a coil whose resistance has shifted and a worn driver fit this code. Opens are P2D5E, low and high P2D60/P2D61. Charging may cut out now and then.

Likely causes

Corroded or loose pins raising resistance in the coil circuit
Coil resistance of contactor C out of tolerance
Ageing output stage in the module

Symptoms

  • Charging interrupts sporadically
  • Contactor clicks late or audibly chatters
  • Code returns after clearing

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–1,500
Time1–5 h

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

Parts involved

bcs pos contactor cwiring harnessbms

Related codes

P2D5EP2D60P2D61P2D66P2BC8P0D0B

References: law.cornell.edu, patents.google.com.