Powertrain, generic · Hybrid propulsion

P0D0D Battery Charging System Positive Contactor A Control Circuit High

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P0D0D means the control line of positive charging contactor A sits too high, typically from a short to a supply voltage or a driver that no longer switches off. The coil may then stay energised, so the contactor could close without a command, which the module has to prevent. No manufacturer documents P0D0D publicly; on the Chevrolet Volt GM folds the short to power into P0D0A and flags it when the off-state output stays within 0.4 V of supply. CARB requires plug-in vehicles to monitor charging components. Causes are crossed or chafed wiring and a failed driver inside the control module. Low readings are P0D0C, opens P0D0A, a welded contactor P0D08. The system normally blocks charging until the fault is gone.

Likely causes

Control wire shorted to a supply voltage
Driver stage in the control module stuck on
Open ground return of the coil letting the line float high

Symptoms

  • Charging blocked
  • Charging or high-voltage 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

P0D0AP0D0BP0D0CP0D08P0D14

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