P2D6EBattery Charging System Positive Contactor D Control Circuit Low
- Generic OBD-II code · Powertrain
- How the car detects it
- 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.
- What you may notice
- Charging mode via contactor D refused
- Fault set as soon as the contactor is commanded
- Charging warning shown
- Likely causes
- LikelyCoil feed wire shorted to ground
- PossibleWater or corrosion in the connector of contactor D
- RareShorted coil in plus contactor D
- 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.