P2D64Battery Charging System Negative Contactor C Stuck Open
- Generic OBD-II code · Powertrain
- How the car detects it
- P2D64 appears when minus charging contactor C does not close; the third charging path then lacks its return conductor and no current flows even with the plus contactor in. No manufacturer documents P2D64 publicly. The principle mirrors GM's Volt check of plus contactor A (P0D09): once charge and precharge contactors are commanded closed, charger-side voltage should rise, and under 10 V in 8 of 9 readings fails the test. Seen from outside, a missing minus connection looks just like a missing plus one, so telling P2D64 from P2D5D needs both coil drives to be checked. CARB requires charger faults that prevent charging to be detected on plug-in hybrids. Burnt contacts, a weak coil feed and software are typical. P2D63 is the welded variant.
- What you may notice
- Charging in the affected mode never starts
- Charging station aborts immediately
- Driving unaffected
- Likely causes
- LikelyMinus contactor C does not pull in or contacts burnt
- PossibleWeak coil supply from wiring or connector faults
- RareSoftware misreads the precharge result
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €150 – €4,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.