P0562
P0562 System Voltage Low
P0562 is a generic OBD2 powertrain diagnostic trouble code for system voltage low. The code identifies the system or circuit the engine computer flagged, but diagnosis still depends on vehicle symptoms, freeze-frame data, and related codes.
How urgent is P0562?
Voltage, module, and sensor-reference codes can create many false symptoms. Fix power and ground problems before chasing individual sensors.
Common symptoms
- Check engine light
- No-start or stall
- Multiple unrelated codes
- Battery light
- Intermittent drivability problems
Likely causes
- Weak battery
- Charging-system fault
- Bad ground
- Sensor reference short
- Module power relay or wiring issue
What to check before replacing parts
1
Test battery and charging voltage
2
Check main grounds
3
Inspect fuses and relays
4
Look for shared 5V reference faults
5
Clear and rescan after voltage repair
Use the code with symptoms
A code points at the system, not always the failed part. Add your vehicle, mileage, symptoms, and whether the check engine light is steady or flashing so the AI diagnostic can narrow the next step.