P2D6E code meaning
Battery Charging System Positive Contactor D Control Circuit Low
What P2D6E means
P2D6E is set when the voltage on the coil supply of plus contactor D reads too low, usually a wire touching ground. No manufacturer documents P2D6E publicly. In a layout where the module switches the supply side of the coil, which a GM patent names as one option besides switching the ground side, a ground short means the driver works into a short circuit: the coil gets no usable current, contactor D stays open and the stage may cut out to protect itself. GM's 2016 contactor drive tests (P0D0A/P0D11) note that their open-load logic cannot see a ground fault, so detecting this case takes a dedicated test. Look for rubbed-through insulation and water in plugs. P2D6F is the high case, P2D75 the minus side.
P2D6E 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 P2D6E
- Charging mode via contactor D refused
- Fault set as soon as the contactor is commanded
- Charging warning shown
Common causes of P2D6E
- Most likelyCoil feed wire shorted to ground
- PossibleWater or corrosion in the connector of contactor D
- Less likelyShorted coil in plus contactor D
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Bcs pos contactor dWiring harnessBms
What each part of P2D6E means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 6E | The exact fault in that area. |
What to do next
- Note P2D6E 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 P2D6E
What does P2D6E mean?
P2D6E means "Battery Charging System Positive Contactor D Control Circuit Low". P2D6E is set when the voltage on the coil supply of plus contactor D reads too low, usually a wire touching ground. It is a generic code, so it means the same on every make.
Is it safe to drive with P2D6E?
P2D6E does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P2D6E fail an emissions test?
P2D6E 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 P2D6E to fix?
Difficulty: workshop only. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will P2D6E clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.