What it means
The positive contactor D of the battery charging system reports a control circuit/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 controlled through a low-voltage circuit that operates the high-voltage battery charging switch. The control module sets this code when it detects an open in that circuit, so it cannot reliably command or confirm D. A broken control wire, open coil, or a connector pin pushed out of place can interrupt the circuit.
Common causes
Most likely first.
- Open in coil control wire
- Open contactor coil
- Pin pushed back out of connector body
Symptoms
- Hybrid or EV system warning
- Charging may be disabled
- Vehicle may not start or enter Ready mode
How to diagnose it
- Record freeze-frame data and related codes, then check live command and status for positive contactor D to confirm the circuit is not responding.
- With the vehicle powered down as specified by the manufacturer, inspect the contactor D connector for a pushed-back pin, incomplete seating, corrosion, or wire damage.
- Check the control-circuit fuse and wiring connections using the manufacturer's wiring information.
- Following the manufacturer's high-voltage safety and isolation procedures, test continuity through the control wire and connector to locate an open.
- If the wiring is intact, compare contactor D coil continuity or resistance with the manufacturer's specification, then test the control driver if needed.
Common fixes
- Seat the connector correctly or repair a pushed-back terminal at positive contactor D.
- Repair an open or damaged control wire.
- Replace positive contactor D if its coil is open or outside the manufacturer's specification.
- Repair the control driver or module if the circuit is intact but its output is absent.
Can I keep driving?
Avoid driving if the vehicle cannot enter Ready mode, and do not rely on charging while the open circuit remains. The battery charging path may be unavailable, leaving the vehicle unable to start or recharge.
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.