Powertrain, generic · Hybrid propulsion

P0D11 Battery Charging System Negative Contactor A Control Circuit/Open

Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P0D11 is the open-circuit and driver check for negative charging contactor A. GM uses it on the Chevrolet Volt (2011, 2014) and the Cadillac ELR: the module compares the commanded driver state with what the line shows; with the driver off, an output above 4 V (2011: 2 V) means open and one close to supply voltage a short to power, and with the driver on a coil current below 57 mA is judged open as well. 40 failing samples out of 50 at 12.5 ms set it as Type A, MIL after one trip; the status of the charging HVIL source is part of the enable conditions. As on the positive side, a short to ground lies outside this test. The positive counterpart is P0D0A, plausibility, low and high are P0D12–P0D14. The vehicle will not charge.

Likely causes

Open or high-resistance coil control wire or connector
Contactor coil open
Control wire shorted to a supply voltage
Faulty driver stage in the control module

Symptoms

  • Malfunction indicator lamp after one trip (GM Type A)
  • Vehicle does not charge

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 harnessbmshybrid control module

Related codes

P0D0AP0D0EP0D10P0D12P0D13P0D14

References: gsi.ext.gm.com, gsi.ext.gm.com, gsi.ext.gm.com.