P0EFCBattery Charger A Input Voltage Sensor C Circuit Range/Performance
- Generic OBD-II code · Powertrain
- How the car detects it
- With P0EFC, sensor C of charger A delivers an electrically sound signal whose value conflicts with the charger's other readings. No manufacturer documents P0EFC publicly. For sensor A, GM shows such a cross-check on the 2011 Volt: the charger module compares the AC peak voltage with two independent bulk voltage readings, and if both differ by more than 34 V for 512 ms within 640 ms, P0D3E is stored as Type A. GM preliminary information PIC5803 (Volt 2011 to 2013, Spark EV 2014) adds a warning: P0D3E together with P1E00 after an interrupted charge usually came from a brown-out, a power cut or a faulty cord set, not from the car. CARB likewise does not demand detection of faults that look the same as a weak supply. Check the outlet and station before blaming the charger.
- What you may notice
- Charging stops part-way or does not reach full charge
- Fault appears only at certain outlets or stations
- Charging fault message, sometimes with a warning lamp
- Likely causes
- LikelyVoltage dips, brown-out or power cut at the outlet or station during charging (GM PIC5803 for the sensor A code)
- PossibleFaulty or poorly calibrated charging cord set or wallbox
- PossibleGain or offset drift of measuring channel C in the charger
- RareCharger software needing an update
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €0 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.