Powertrain, generic · Hybrid propulsion

P0D0C Battery Charging System Positive Contactor A Control Circuit Low

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P0D0C stands for a control line of positive charging contactor A that reads too low, usually a short to ground or a driver output pulled down. When the coil is fed through a high-side driver, a grounded line leaves the contactor without power or overloads the driver. No manufacturer documents P0D0C publicly. GM states that its own Volt check for this contactor, P0D0A, cannot detect a short to ground, so the documented tests do not cover this case; CARB requires the charging system of plug-in vehicles to be monitored. Chafed harness sections near the battery or charge inlet and water in connectors are the usual causes. High readings are P0D0D, opens P0D0A, the negative side P0D13. The typical result is a charging session that will not start.

Likely causes

Control wire chafed through and shorted to ground
Moisture in a connector creating a path to ground
Shorted contactor coil

Symptoms

  • Charging does not start
  • Charging system warning

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 awiring harnessbms

Related codes

P0D0AP0D0BP0D0DP0D13

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