Powertrain, generic · Hybrid propulsion

P0D4A Battery Charger 14 Volt Output Current Sensor Circuit High

Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P0D4A sets when the current sensor in the charger's 14 V output reports 54 A or more. GM's battery charger control module in the 2011-2014 Volt and the ELR applies that threshold for 400 of 500 ms with the low-voltage section awake and treats the result as a Type A fault with MIL. Either the sensor signal is stuck high or the output is genuinely overloaded or shorted; GM's tables do not separate the two. P0D49 is the low counterpart, and both block GM's 14 V output power check P0D5B. Because the stage sits inside the on-board charger, the car's main DC/DC converter is not the place to look. Owners mainly notice that the car refuses to charge or stops charging soon after plugging in.

Likely causes

Current sense signal stuck high inside the charger
Overload or short on the charger's low-voltage output
Failed on-board charger

Symptoms

  • Vehicle will not charge
  • MIL on (GM)

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€50–2,500
Time0.5–4 h

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

Parts involved

battery charger 14v output current sensoron board charger

Related codes

P0D49P0D48P0D47P0D4BP0D5B

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