P2D6ABattery Charging System Positive Contactor D Stuck Closed
- Generic OBD-II code · Powertrain
- Can trigger limp mode
- How the car detects it
- P2D6A reports that positive charging contactor D still conducts after being told to open, nearly always because its contacts have welded. No manufacturer documents P2D6A publicly. A Ford patent explains where welds come from and how they are found: of the two charge contactors, the one closing last completes the circuit and takes the arcing, so Ford alternates the closing order between sessions. After charging, that last one is opened first and, once the charger-side voltage has had time to decay, is judged welded if that voltage still roughly equals the battery voltage. A single weld ends charging until repair; with both poles welded the car will not drive either. P2D6B is the opposite fault, P2D71 the minus side, P2D5C the C twin.
- What you may notice
- Charging locked after the previous session
- Vehicle may not become ready if the other pole is welded too
- Fault appears at the end of a charging session
- Likely causes
- LikelyContacts of plus contactor D welded by arcing
- RareCoil kept energised by a faulty output stage
- RareFaulty charger-side voltage measurement simulating a weld
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €200 – €4,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.