P2D68 code meaning
Battery Charging System Negative Contactor C Control Circuit High
What P2D68 means
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.
P2D68 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor1 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2D68
- Charging blocked as a precaution
- Contactor may click without a charging request
- High-voltage or charging warning
Common causes of P2D68
- Most likelyDrive wire chafed against a 12 V supply line
- PossibleOutput stage in the module no longer switches off
- Less likelyWires swapped or pinched after repair work
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Bcs neg contactor cWiring harnessBms
What each part of P2D68 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 68 | The exact fault in that area. |
What to do next
- Note P2D68 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2D68
What does P2D68 mean?
P2D68 means "Battery Charging System Negative Contactor C Control Circuit High". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P2D68?
P2D68 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P2D68 fail an emissions test?
P2D68 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P2D68 to fix?
Difficulty: workshop only. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will P2D68 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.