P2D5CBattery Charging System Positive Contactor C Stuck Closed
- Generic OBD-II code · Powertrain
- Can trigger limp mode
- How the car detects it
- P2D5C is set when positive charging contactor C still conducts after the module commanded it to open; fused contacts are the usual reason. No manufacturer documents P2D5C publicly. Patents describe how a weld shows up: Ford opens its charge contactors one at a time after a session and treats one as welded if the voltage measured at the charger stays within a set margin of the battery voltage; one welded pole blocks further charging, both welded also block driving. GM spots a stuck contactor before start-up from the coil current of a short pulse that is too brief to close a healthy one. Because the plus pole of that charging path can stay live, the module usually locks the path. P2D5D is the reverse fault, P2D63 a welded minus contactor C, P2BC5 the contactor B twin.
- What you may notice
- Charging blocked after the previous session
- High-voltage warning, possibly no ready mode
- Code appears at the end of a charging session or at start-up
- Likely causes
- LikelyMain contacts of contactor C welded, e.g. after switching under load
- RareCoil output stage does not switch off
- RareFaulty voltage measurement on the charger side 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.