P0D46Battery Charger 14 Volt Output Voltage Sensor Circuit Intermittent/Erratic
- Generic OBD-II code · Powertrain
- How the car detects it
- P0D46 stands for a sporadic or unstable signal from the voltage sensor at the 14 V output of the on-board charger. No manufacturer documents it publicly. GM monitors this output in the Volt and ELR charger only for plausibility, low and high readings (P0D43-P0D45) and lists no intermittent variant. The Ford patent on a DC/DC stage housed in the charger shows why the value matters: that stage can regulate the 12 V bus during charging without closing the main contactors, and it needs a steady voltage feedback to do so. CARB counts erratic readings among the faults that comprehensive component monitoring has to catch. Loose low-voltage connections at the charger or a failing internal sense circuit are the main suspects.
- What you may notice
- 12 V battery not kept charged while plugged in
- Occasional charging interruptions
- Likely causes
- PossibleLoose 12 V, ground or signal connection at the charger
- PossibleVoltage sense circuit inside the charger failing intermittently
- RareElectrical interference on the low-voltage network
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €50 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.