Powertrain, generic · Hybrid propulsion

P0D23 Battery Charger A Output Shorted

Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P0D23 points to a short on the high-voltage output side of the on-board charger. GM runs this check while the charger contactor is only in its precharge state and the multi-purpose contactor is open, a moment when almost no current should flow on the charger bus. If more than 0.35 A is measured there in four of five samples at 100 ms, with system voltage above 9 V or 10.2 V, the code is set as One Trip Type A in the Chevrolet Volt from 2011 and the Cadillac ELR up to 2016. The test is skipped while output current sensor faults are active or while thermal conditioning runs. A current at that stage suggests an internal short in the charger output, a damaged high-voltage cable or a stuck contactor path. Charging is blocked. Current deviations during normal charging are P0D22.

Likely causes

Internal short in the charger's high-voltage output stage
Damaged high-voltage cable between charger and battery
Charging contactor path conducting when it should not

Symptoms

  • Charging refused immediately after plugging in
  • MIL on at once

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€300–2,500
Time1–5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

battery charger awiring harnesshybrid control module

Related codes

P0D22P0D26P0D53P2E3D

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