Powertrain, generic (extended)

P2BCE Battery Charging System Negative Contactor B Control Circuit/Open

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P2BCE watches the coil drive of negative charging contactor B for an open line or a driver whose real state differs from its command. No manufacturer documents P2BCE publicly. The closest published test is GM's P0D11 for minus contactor A in the Volt and the ELR: an output above 4 V with the driver off, a voltage close to supply, or a coil current under 57 mA with the driver on all count as faults, and the status of the charging high-voltage interlock belongs to the enable conditions; GM rates it Type A. CARB makes such charging-circuit checks mandatory for plug-in models. Broken wires near the battery, pushed-back terminals and an open coil top the list. Range/performance, low and high are P2BCF–P2BD1, the plus side P2BC7. Without its return contactor that charging mode is lost.

Likely causes

Control wire or terminal of negative contactor B open
Coil of negative contactor B open
Driver stage in the module defective

Symptoms

  • Charging via the contactor B path not possible
  • Charging fault indication

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 neg contactor bwiring harnessbms

Related codes

P2BCBP2BCFP2BD0P2BD1P2BC7P0D11

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