Powertrain, generic · Hybrid propulsion

P0D4C Battery Charger Hybrid/EV Battery Output Voltage Sensor Circuit

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P0D4C is the general circuit code for the sensor that reports the DC voltage the on-board charger delivers to the high-voltage traction battery. No manufacturer documents P0D4C publicly; GM (Volt, ELR) and Mitsubishi (Outlander PHEV) split electrical faults of this measurement into the low and high codes P0D4E and P0D4F instead, and GM's Volt checks plausibility with P0D4D. CARB requires plug-in hybrids to detect charger faults that stop or limit charging, which is why such a sensor is diagnosed at all. The code points to an open or otherwise unusable signal path, usually inside the charger itself. Driving normally remains possible, but AC charging is typically refused until the fault is cleared.

Likely causes

Voltage sensing electronics inside the on-board charger failed
Interrupted signal path or poor internal connection in the charger
Charger software fault, fixed by reprogramming

Symptoms

  • Plug-in charging does not start or stops shortly after starting
  • Charging system warning in the instrument cluster
  • Vehicle can still be driven on stored energy or fuel

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 hv output voltage sensoron board charger

Related codes

P0D4DP0D4EP0D4FP0D50P0D51P0D5C

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