What it means
The positive contactor D of the battery charging system reports a control circuit range/performance 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 circuit response and feedback, setting this code when they fall outside the expected range or do not match the command. A drifting coil or resistance at the connector can make the response unreliable.
Common causes
Most likely first.
- Coil resistance drifted
- High-resistance contact in connector
- Sensor element aged beyond calibration window
Symptoms
- Hybrid or EV system warning
- Charging may be limited or disabled
- Vehicle may not enter Ready mode
How to diagnose it
- Save freeze-frame data and related codes, then compare live positive contactor D command and feedback to identify when the response is out of range.
- With the vehicle powered down as specified by the manufacturer, inspect contactor D wiring and connector terminals for corrosion, looseness, heat damage, or chafing.
- Check terminal fit and look for intermittent contact that could add resistance to the circuit.
- Following the manufacturer's high-voltage safety and isolation procedures, measure contactor D coil resistance and compare it with the manufacturer's specification.
- If wiring and coil readings meet specification, use the manufacturer's diagnostic procedure to check the feedback circuit and control module.
Common fixes
- Clean or repair corroded or loose positive contactor D connector terminals.
- Repair damaged wiring in the contactor D circuit.
- Replace positive contactor D if its coil or feedback response is outside the manufacturer's specification.
- Repair the control module or driver if testing confirms the circuit response is being misread or miscontrolled.
Can I keep driving?
Avoid relying on the vehicle for routine travel or repeated charging if charging is limited or Ready mode is unavailable. The high-voltage path may stop working, leaving the vehicle unable to start or charge.
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.