What it means
The positive contactor D of the battery charging system reports a circuit 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 in the battery charging path. The control module monitors the contactor circuit and sets this code when it detects a circuit fault that prevents reliable control; this code does not by itself identify whether the contactor is stuck open or closed. A failed contactor or a wiring or connector fault can interrupt charging or prevent Ready mode.
Common causes
Most likely first.
- Contactor failed
- Wiring or connector fault
Symptoms
- Hybrid or EV system warning
- Charging may fail or stop
- Vehicle may not enter Ready mode
How to diagnose it
- Save freeze-frame data and check for related hybrid or EV codes, then review live data for the positive contactor D command and status.
- With the vehicle powered down as specified by the manufacturer, inspect contactor D's low-voltage connector and harness for looseness, corrosion, heat damage, or chafing.
- Check the relevant fuse and connector terminal fit according to the manufacturer's wiring information.
- Following the manufacturer's high-voltage isolation procedure, test the contactor D control circuit and coil for continuity and compare results with the manufacturer's specification.
- If the circuit and coil pass, use the manufacturer's procedure to determine whether contactor D is switching as commanded or the control module is at fault.
Common fixes
- Repair damaged wiring or loose connections in the positive contactor D circuit.
- Clean or replace corroded connector terminals.
- Replace positive contactor D if it fails the specified circuit or switching tests.
- Repair the control driver or module if testing isolates the fault there.
Can I keep driving?
If charging fails or the vehicle will not enter Ready mode, do not rely on it for a trip; arrange service or recovery as appropriate. A failed high-voltage charging path can leave the vehicle unable to start or replenish its battery.
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.