Powertrain, generic · Hybrid propulsion

P0D44 Battery Charger 14 Volt Output Voltage Sensor Circuit Low

Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P0D44 is logged once the voltage sensor of the charger's 14 V output delivers an implausibly low raw value. In GM's charger module for the 2011-2014 Volt and the ELR the limit is a sensor signal of 1.87 V or less, held for 400 of 500 ms while the low-voltage section is awake; it is a Type A fault and lights the MIL. The 2016 ELR charger table also lists the code as a precondition for its output power checks, and GM's 14 V output power test P0D5B only runs without it. The output is a low-voltage DC stage built into the charger, not the vehicle's primary DC/DC converter. A grounded signal path or failed electronics inside the charger are typical; internal faults are cured only by reprogramming or replacing the charger.

Likely causes

Voltage sense signal shorted to ground inside the charger
Failed low-voltage stage of the on-board charger
14 V output collapsed by an external short or overload

Symptoms

  • MIL on (GM)
  • Charging may stop or not complete

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–2,500
Time0.5–4 h

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

Parts involved

battery charger 14v output voltage sensoron board charger

Related codes

P0D45P0D43P0D42P0D46P0D5B

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