P0560System Voltage
What it means
The ECU sees a supply voltage outside the expected range or unstable.
Symptoms
- Warning lights, flickering lights
- Hard starting
- Random electrical faults
Common causes
- Weak battery
- Charging system fault
- Poor battery or ground connections
What to check first
- Load-test the battery
- Check charging voltage at idle and 2,000 rpm
- Voltage-drop test the main power and ground cables
Generic OBD-II meaning. Manufacturer-specific meanings and checks can differ; always check the service information for the car.