What it means
The positive contactor D of the battery charging system reports a stuck open condition. HV charging path cannot be commanded reliably.
At a glance
- Usually lights the check-engine light
- The engine or gearbox may go into limp mode
How it works
Positive contactor D is a high-voltage switch that closes to connect part of the battery charging path. The control module compares its command with contactor feedback and sets this code when D fails to close as commanded. Oxidised contacts, a burned-out coil, or restricted contact movement can prevent the path from being made.
Common causes
Most likely first.
- Contactor contacts oxidised
- Contactor coil burned out
- Carbon or debris buildup preventing free movement
Symptoms
- Hybrid or EV system warning
- Charging may be disabled
- Vehicle may not start or enter Ready mode
How to diagnose it
- Save freeze-frame data and check related codes, then use live data to compare the positive contactor D close command with its reported status.
- With the vehicle powered down as specified by the manufacturer, inspect contactor D's low-voltage connector and harness for loose, corroded, or damaged terminals.
- Check the relevant fuse and control wiring using the manufacturer's wiring information before suspecting the contactor itself.
- Following the manufacturer's high-voltage isolation procedure, test the contactor D coil and control circuit against the manufacturer's specification.
- If supply and control checks pass, have a qualified technician test contactor D's contact movement and feedback using the manufacturer's procedure.
Common fixes
- Clean or repair a loose or corroded positive contactor D connector.
- Repair an open or damaged section of its control wiring.
- Replace positive contactor D if its coil, contacts, or movement fail the specified tests.
- Repair the control driver or module if testing confirms it does not command the contactor correctly.
Can I keep driving?
Do not count on the vehicle for travel if it will not enter Ready mode, and do not continue charging attempts if charging is disabled. The vehicle may remain unable to connect its battery charging path.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.