Powertrain, generic · Hybrid propulsion

P0D49 Battery Charger 14 Volt Output Current Sensor Circuit Low

Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P0D49 reports that the current sensor in the charger's 14 V output reads too low. GM's battery charger control module in the 2011-2014 Volt and the ELR sets it when the raw current value is 0.293 A or less for 400 of 500 ms while the low-voltage section is awake, as a Type A fault with MIL; the 2016 ELR charger table also lists it as a precondition for its output power checks. GM treats a value at this level as a sensor fault, which points to an open or grounded sense path or failed measuring electronics. The high counterpart is P0D4A. This output is a low-voltage stage inside the charger, not the Volt's separate accessory power module. Charging behaviour can be affected; driving normally is not.

Likely causes

Open or grounded current sense path inside the charger
Failed low-voltage stage of the on-board charger
12 V supply or fuse of the charger interrupted

Symptoms

  • MIL on (GM)
  • Charging may fail

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

P0D4AP0D48P0D47P0D4BP0D5B

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