P2D68Battery Charging System Negative Contactor C Control Circuit High
- Generic OBD-II code · Powertrain
- How the car detects it
- P2D68 means the wire energising minus charging contactor C carries more voltage than commanded, for instance where it rubs on a 12 V line or the output stage keeps conducting. No manufacturer documents P2D68 publicly. GM's published tests show how such a short is judged and how the margin has tightened: for the 2011 Volt minus charge contactor (P0D11) GM calls it a short to supply once the idle output comes within 1.2 V of the supply voltage; the 2016 tables cut that margin to 0.4 V. If the coil is fed from the high side, a short can pull contactor C in without command and close the return pole while the module thinks it is open, so charging is normally locked. P2D67 is the low case, P2D61 the plus side, P2D76 contactor D.
- What you may notice
- Charging blocked as a precaution
- Contactor may click without a charging request
- High-voltage or charging warning
- Likely causes
- LikelyDrive wire chafed against a 12 V supply line
- PossibleOutput stage in the module no longer switches off
- RareWires swapped or pinched after repair work
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.