P2DABDC/AC Converter Control Module A Switch B Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Needs a drive cycle to confirm a fix
- How the car detects it
- With P2DAB, switch B of converter module A – the unit feeding the vehicle's AC sockets – fails a plausibility test. Wiring tests pass, yet switch B does not deliver what was asked of it: it stays closed after an off command, opens under load, or reports a position that disagrees with the measured output. CARB 13 CCR 1968.2 calls for such functional checks on output components. In Ford's patent US11043801B2 the controller opens socket switches on its own – after a timer, above a user current limit or when total power is too high – so a state the module did not expect can also come from this logic. No manufacturer documents P2DAB publicly. A switch that welds shut is the more serious case, because the socket can no longer be switched off; contact wear and moisture are the usual reasons.
- What you may notice
- Outlets of group B switch off unexpectedly or cannot be switched off
- Warning about onboard power in the display
- Fault appears mainly with high loads connected
- Likely causes
- LikelyContacts of switch B or its relay welded, sticking or worn
- PossibleMoisture or dirt at the outlet panel of group B
- RareLoad management or software in the converter module, update available
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.