Powertrain, generic · Hybrid propulsion

P0D14 Battery Charging System Negative Contactor A Control Circuit High

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P0D14 is set when the control line of negative charging contactor A reads too high, for example through a short to the 12 V supply or a driver stage that will not switch off. That can keep the coil energised and the contactor closed without a command, so the module blocks charging. No manufacturer documents P0D14 publicly; on the Volt and ELR GM counts a short to power under P0D11 and detects it when the off-state output stays close to supply voltage. CARB requires plug-in vehicles to monitor charging components. Chafed or crossed wiring and a failed driver are the main causes. The low case is P0D13, a welded contactor P0D0F, the positive side P0D0D. Repairs belong in the hands of high-voltage trained staff.

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 neg contactor awiring harnessbms

Related codes

P0D11P0D12P0D13P0D0FP0D0D

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