B0127DC/AC Converter A High Voltage Power Outlet "A" Circuit/Open
- Generic OBD-II code · Body
- How the car detects it
- B0127 reports an open circuit to power outlet A of DC/AC converter A, one of the household-voltage sockets the converter supplies. Ford's patent US11043801B2, behind Pro Power Onboard, gives every socket its own conductor, on/off switch and ground-fault interrupter, fed by an inverter that draws on the traction battery, the motor-generator or both; sensors ahead of and behind each switch let the controller check the path. GM's program N222385490 shows how directly the outlets hang on the converter: 2023 Silverado and Sierra 1500 built without a working inverter had dead dash and bed outlets until it was retrofitted. The makers keep the position of socket A to themselves; B0127 appears in no public document. Outlet A stays dead; driving is unaffected.
- What you may notice
- Outlet A supplies no power while other outlets may still work
- Message that onboard power or the outlet is unavailable
- Outlet circuits carry 120/240 V AC from a high-voltage source; work only with the system de-energised
- Likely causes
- LikelyWire or terminal in the feed to outlet A broken or pushed out
- PossibleSocket insert or its built-in protection defective
- RareOutput switch or relay for outlet A inside the converter faulty
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €60 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.